Ruby on Rails

Rails Tutorials

2008-08-16T20:25:00.000-07:00

Here are a few beginner tutorial about Ruby on Rails:

has_many :through tutorial by byrnejb: "What I want to do is have three tables: movies, dancers and their join table that I called dancer_movies. The main goal of this exercise is to be able to add dancers directly via a drop down that lists all dancers from the database (and the number of dances they appeared in in that movie) when creating a new movie entry."
Rails 2.1 Tutorial by Tutorials Point.
Ruby on Rails Tutorial on Rails Wiki to get a basic Rails application running.
Tutorial on using the Ruby MySQL Module by Paul Dubois.
Hpricot interface to using Libxml. Hpricot is a user friendly XML parser for Ruby but Libxml is blazing fast. This tutorial shows how you can implement a hpricot like interface to using libxml.
Parsing XML with Ruby: This tutorial by John Nunemaker shows how you can parse XML using Hpricot, libxml and REXML. Example parsing of Twitter and Del.icio.us feeds is shows.
REXML tutorial for parsing XML
Parsing XML using Ruby: A tutorial by Yahoo

Back to Ruby

2008-08-16T20:07:00.000-07:00

My apologies to readers of this blog for not posting on this blog for more than a year. Since June 2006, I was working for the 13th largest website in the world (based on traffic) with more than 4 billion page views a month. There was little to no use of Ruby at my previous employment as it was primarily a Java shop. I gained a lot of scalability experience working for them. In July of this year, I left my job to join a very promising new startup that's working on a disruptive technology (more on this later).

One of the good things about my new job is that we are primarily a Ruby shop, so you can definitely expect more postings :).

Displaying a Textarea field

2006-12-05T17:37:00.000-08:00

Use the following in your views to add a text area control.

text_area 'portal', 'portal_description' , :rows=>4, :cols=>40

Displaying a DATE TIME field

2006-12-05T17:31:00.000-08:00

If your column is defined to be DATETIME, then you can use the datetime_select method to display the date/time control.

datetime_select 'subscription', 'created_at'

The default date and time values for this control can be specified. See setting the default time for datetime_select.

For more information see datetime_select manual page.

2006-10-07T13:43:00.000-07:00

I wanted to allow a user to type in the address for their community and then instantly inform them whether the address they wanted was available.

In my controller:


        def check_portal_url
        end

In my view:


<%@comm = Portal.find_by_portal_url(@params[:search])   %>
<%if @comm%>
                <%=@params[:search]%> is taken, please try a different address.
<%else%>
                <%=@params[:search]%> is available.
<%end%>

and in my form


 

<%= observe_field(:portal_portal_url,
                 :frequency => 0.5,
                 :update => :observe_results,
                 :loading => "Element.show('spinner')",
                 :complete => "Element.hide('spinner')",
                 :url => { :controller=>'ajax',:action => 'check_portal_url'  },
                :with => "'search=' + escape(value)"
                ) %>

<div id="observe_results"></div>
In the above, the

                :with => "'search=' + escape(value)"

part is very important as without it, the value of the field will be very hard to access.

LIKE as a condition to get records.

2006-08-21T13:14:00.000-07:00

Here's a handy tip for Rails beginners: When you need to find records based on a condition that involves the use of LIKE '%value%' (it's going to be very slow since MySQL won't use an index for this query), try something like the following:

 @records = MyModel.find(:all, :conditions => ['col LIKE ? ', '%'+@term+'%'],:limit => 10)

Starting Webrick on a different port

2006-08-21T13:11:00.000-07:00

Often you may need to start webrick on a different port. Luckily, you can do so using the -p options.

[root@srv31 ror]# ruby script/server -p 9191
=> Booting WEBrick...
=> Rails application started on http://0.0.0.0:9191
=> Ctrl-C to shutdown server; call with --help for options
[2006-08-21 13:45:37] INFO  WEBrick 1.3.1
[2006-08-21 13:45:37] INFO  ruby 1.8.4 (2005-12-24) [i686-linux]
[2006-08-21 13:45:37] INFO  WEBrick::HTTPServer#start: pid=4812 port=9191

For more help options use the --help option:

[root@srv31 ror]# ruby script/server --help
=> Booting WEBrick...
Usage: ruby server [options]

    -p, --port=port                  Runs Rails on the specified port.
                                     Default: 3000
    -b, --binding=ip                 Binds Rails to the specified ip.
                                     Default: 0.0.0.0
    -e, --environment=name           Specifies the environment to run this server under (test/development/production).
                                     Default: development
    -m, --mime-types=filename        Specifies an Apache style mime.types configuration file to be used for mime types
                                     Default: none
    -d, --daemon                     Make Rails run as a Daemon (only works if fork is available -- meaning on *nix).
    -c, --charset=charset            Set default charset for output.
                                     Default: UTF-8

    -h, --help                       Show this help message.

ActiveRecord::Subclass Not found

2006-08-06T19:20:00.000-07:00

If you ever get the following error:

The single-table inheritance mechanism failed to locate the subclass: 'link'. This error is raised because the column 'type' is reserved for storing the class in case of inheritance. Please rename this column if you didn't intend it to be used for storing the inheritance class or overwrite Olink.inheritance_column to use another column for that information.

Make sure you don't have a field named type in your table.

Comparison of String with Integer failed

2006-07-29T11:40:00.000-07:00

If you have code like

@category_id=get_id_from_permalink(@params[:permalink_id]);
if @category_id >=1
....
end

then you will get the following error:

comparison of String with 1 failed

To fix the error modify the above code so it is something like:

if @category_id.to_i >=1
....
end

Custom URLs with routes.rb

2006-07-29T10:40:00.000-07:00

Using the routes.rb file, we can create custom URLs. It is important to note that the following is valid :

map.connect ':permalink', :action=>'list', :controller=>'categories'

whereas the following are not valid:

map.connect ':permalink-:id', :action=>'list', :controller=>'categories'
map.connect ':permalink_id.html', :action=>'list', :controller=>'categories'
map.connect ':permalink-:id.html', :action=>'list', :controller=>'categories'

Calling a controller method from a view raises NoMethodError

2006-07-29T10:24:00.000-07:00

If you put a custom function in application.rb or another controller and then try to access it from your view, you'll get the "No Method Error" similar to following:

NoMethodError in Categories#list
Showing app/views/categories/list.rhtml where line #23 raised:
undefined method `create_permalink' for #<#:0xb7931838>

The solution is to place the function as a helper function in the app/helpers/categories_helper.rb or app/helpers/application_helper.rb file.

URL Escape and URL Unescape

2006-07-29T10:17:00.000-07:00

I find these functions really handy when having to escape or unescape URL:

def url_escape(string)
string.gsub(/([^ a-zA-Z0-9_.-]+)/n) do
'%' + $1.unpack('H2' * $1.size).join('%').upcase
end.tr(' ', '+')
end

def url_unescape(string)
string.tr('+', ' ').gsub(/((?:%[0-9a-fA-F]{2})+)/n) do
[$1.delete('%')].pack('H*')
end
end

I usually place them in application.rb.

Calculating time difference

2006-07-29T10:14:00.000-07:00

Here is a Ruby on Rails function I wrote that returns time difference in minutes. It can be easily modified to return time difference in seconds, hours etc.

def time_diff_in_minutes (time)
diff_seconds = (Time.now - time).round
diff_minutes = diff_seconds / 60
return diff_minutes
end

Embedding and extracting primary key in a clean URL

2006-07-29T09:58:00.000-07:00

Clean URLs are very important for search engines and for that reason I always prefer them.

A url of the form http://rubyonrails.blogspot.com/article/55 is better than http://rubyonrails.blogspot.com/?aid=55.

An even better form of the URL is http://rubyonrails.blogspot.com/article-title-55 where article-title represents the important keywords that appear in the title.

When using Ruby on Rails, you can create the permalink from title using the following function:

def create_permalink(string)
string.gsub(/([^ a-zA-Z0-9_.-]+)/n) do
'%' + $1.unpack('H2' * $1.size).join('%').upcase
end.tr(' ', '-').downcase

end

and you can extract the id from this permalink using a function given below:

def get_id_from_permalink(permalink)
@temp_array = permalink.split('-')
id=@temp_array[-1]
return id
end

Ruby on Rails tips

2006-07-16T16:02:00.000-07:00

Call a function before each method in a controller.
Define the function in application.rb and then edit your desired controller file and put the following

before_filter :application_essentials

Rails Optimization

2006-04-12T10:39:00.000-07:00

Today I came across a good article about Ruby on Rails optimization on Text Drive by Julik. She talks about the various steps you can take to optimize your Rails application. While you really should read the article, in a nutshell, she talks about the following:

1. Minimize the amount of FCGI listeners
2. Use caching
3. NEVER run “development” on FastCGI for more than 1-2 hours
4. Observe your memory consumption
5. Rotate your logs
6. Write and run unit tests
7. Check for memory leaks when you are developing
8. Be careful with iterations
9. Watch the Rails TRAC for bug reports
10. Be vigilant when restarting your server

I will add more Rails related optimization resources in the future and post them to my Ruby on Rails favorites so check back soon.

Lite Speed web server: I haven't checked Lite speed web server yet, but plan to do so very soon.

Technorati: Rails Ruby
Adoppt: Rails

To Open Source or Not to Open Source?

2006-03-23T17:28:00.000-08:00

I have been receviving a lot of feedback on Adoppt.com and based on the feedback, I have one question:

Should I open source my project? What are benefits / drawbacks?

Adoppt employs many principles that I have learned over the years. Alongwith my upcoming Pro Rails book, it will be something nice to give back to the community.

So far I think I would like to Open Source the software only for personal use and place a licensing fee for commercial use. Is that possible with Open Source? I know MySQL does something like this.

If I do Open Source it, should I host the code myself or put it on Sourceforge or Rubyforge?

Questions / Ideas / Experiences / Suggestions Welcome

Frank

MVC - Model View Controller Architecture

2006-03-23T12:45:00.000-08:00

Here's a diagram I made to help explain MVC architecture to beginners.

If the Model, View Controller (MVC) terminology bothers you, you may use the alternate vocabulary until you can feel comfortable. For instance, as depicted in the figure above, you may refer to "controller" as "input", "model" as "processor" or "processing" and "view" as "output".

So in other words, controller receives the input, passes it to the model for processing, or to the view for output.

--Frank

What the people want

2006-03-21T21:54:00.000-08:00

These are some questions I have received about what people want to learn about Ruby on Rails, after I asked what people were interested in a post made yesterday to my MySQL blog entitled, Pro Rails and Applied Ruby on Rails: What do you want to learn? Please don't hesitate to send me your own questions and topics about Ruby, Ruby on Rails, and AJAX you would like to see covered in my upcoming book Pro Rails and Applied Ruby on Rails. Send questions to softwareengineer99 at yahoo dot com.

· How to install rails
· How to start an application
· What should I be familiar with before starting?
· How to install plugins (gems)
· How long will it take me to learn
· how to make a blog application
· how to make a forum application
· how to make a messaging system
· how to make a tagging system
· what if I don’t know OO?
· Is ROR different than Ruby?
· How do I connect to databases in Ruby OR
· What databases can I use with ROR?
· How do I paginate documents in ROR
· How do I made a class?
· What is a class?
· What are attributes?
· What are variables?
· What are functions?
· What is MVC
· What are models?
· What are views?
· What are controllers?
· How are they used together?
· How do I validate things in ROR?
· What is HABTM?
· will my application work on multiple browsers
· can I use ROR on a Mac? Windows? Linux?
· Can I scale my application?
· What are normalized tables
· How do I make normalized tables?
· can I use ROR with more than one database?
· how do I use AJAX with ROR
· What is AJAX?
· What is Ajax used for?
· Is there a ROR community to turn to for help?
· What is a Rails Engine?
· How can I use a Rails Engine?
· Do I need special hosting service to have a ROR application on the web?
· What are some tools I can use to learn ROR?
· What are some good websties about ROR?
· What port does ROR run on?
· Can I use ROR with apache?
· Can I use ROR with lighttpd?
· What are relationships?
· What is a many to many relationship?
· What is a one to many relationship?
· Where would I use a JOIN?
· How can I search and retrieve data in ROR?
· How do I insert data into databases with ROR?
· What is tagging?
· What is Web 2.0?
· How can I make text editable without reloading the page?
· How can I use AJAX to make the page not have to reload to login?
· What is JRuby?
· How do I make elements draggable?

Tags: Ruby on Rails, AJAX

Using AJAX and Ruby on Rails to Display Alexa graphs

2006-03-06T20:34:00.000-08:00

I have posted a new tutorial on how to use AJAX and Ruby on Rails to display Alexa traffic graphs and site rank information at Designerz Blog.

Enjoy
Frank

acts_as_taggable pagination

2006-03-05T12:05:00.000-08:00

Recently I needed to paginate the results of find_tagged_with method. I am using the acts_as_taggable plugin.

I did not want to paginate the collection after it has been retrieved since the data set I am working with is huge.

Just for reference, using the paginate_collection function, you'll use something like this to paginate your collection:

q_favorites=Favorite.find_tagged_with(:any => params[:tag], :separator=>',', :order=>'updated_at DESC')
@favorite_pages, @favorites = paginate_collection(:collection=>q_favorites, :page => @params[:page])

So, after looking around (and not finding a solution), I finally decided to go the query way.

Here's my solution based on paginate example in the Wiki. Enjoy:

page = (params[:page] ||= 1).to_i
items_per_page = 3
offset = (page - 1) * items_per_page

@webpage_count = Webpage.count("tags_webpages.tag_id = tags.id AND ( tags.name = 'Accounting' ) AND webpages.id = tags_webpages.webpage_id",
joins = ", tags_webpages, tags")

@webpage_pages = Paginator.new(self, @webpage_count, items_per_page, page)

@webpages=Webpage.find_tagged_with(:any => params[:tag], :limit=>items_per_page, :offset=>offset, :separator=>',', :order=>'updated_at DESC')

If you can think of something better, please post a comment.

Travering Arrays, Hashes and Collections. [Ruby on Rails]

2006-03-03T19:18:00.000-08:00

Traversing a hash's values

myitems.each_value do |item|
# do stuff with item
end

Traversing an array (similarly a collection can be traversed)

myitems.each do |key, value|
# do stuff with key and value
end

Tagging on Rails: acts_as_taggable count DESC

2006-03-03T19:06:00.000-08:00

Today, while working on a project involving acts_as_taggable I noticed something interesting:

I was using something like:

@tagged_blogosphere = Webpage.tags_count(:limit => 100,:order=>' count desc ' )

and this was producing the following SQL statemetn:

SELECT tags.id AS id, tags.name AS name, COUNT(*) AS count FROM tags_webpages, webpages, tags WHERE tags_webpages.tag_id = tags.id
AND tags_webpages.webpage_id = webpages.id GROUP BY tags.name ORDER BY count desc LIMIT 100

However, the records weren't really in order specified.

After a few minutes of researching I found that the order is lost when the hash is being prepared for the tags_count table.

So, following the advice mentioned on Singleton methods for acts_as_taggable page, I modified my call as follows

@tagged_blogosphere = Webpage.tags_count(:limit => 900,:raw=>true, :order=>' count desc ' )

Because of that, I had to change my display also (thanks to Tom Fakes for the tag cloud function.

<ul class="taglistinline">
<% tag_cloud(@tagged_blogosphere, %w(cloud1 cloud2 cloud3 cloud4 cloud5 cloud6 cloud7)) do |tag, cloud_class| %>



<li> <%= link_to(h("#{tag}"), "//#{url_home}/tag/"+ u("#{tag}"), { :class => cloud_class } ) %></li>

<% end %>
</ul>

The default implementation of Tom Fakes' function is (WHEN NOT USING :raw=>true) :

def tag_cloud(tag_cloud, category_list)
max, min = 0, 0
tag_cloud.each_value do |count|
max = count if count > max
min = count if count < min
end

divisor = ((max - min) / category_list.size) + 1

tag_cloud.each do |tag, count|
yield tag, category_list[(count - min) / divisor]
end
end

If you want to use :raw=>true option, you can use the following:

def tag_cloud_raw(tag_cloud, category_list)
max, min = 0, 0
tag_cloud.each do |element|
count = element['count'].to_i
max = count if count > max
min = count if count < min
end

divisor = ((max - min) / category_list.size) + 1

tag_cloud.each do |element|
tag = element['name']
count = element['count'].to_i
yield tag, category_list[(count - min) / divisor]
end
end

Yahoo! User Interface Blog

2006-03-03T15:27:00.000-08:00

earlier I posted about YUI. Here' the blog for it: Yahoo! User Interface Blog

Yahoo! UI Library

2006-03-03T15:10:00.000-08:00

Just came across this library while reading the Ruby on Rails list and wanted to let everyone know. Yahoo! has released a wonderful library consisting of its UI tools:

Yahoo! UI Library: "The Yahoo! User Interface Library is a set of utilities and controls, written in JavaScript, for building richly interactive web applications using techniques such as DOM scripting, HTML and AJAX. The UI Library Utilities facilitate the implementation of rich client-side features by enhancing and normalizing the developer's interface to important elements of the browser infrastructure (such as events, in-page HTTP requests and the DOM). The Yahoo UI Library Controls produce visual, interactive user interface elements on the page with just a few lines of code and an included CSS file. All the components in the Yahoo! User Interface Library have been released as open source under a BSD license and are free for all uses."

Also see Yahoo! Patterns

Rails Chicklets

2006-03-02T21:58:00.000-08:00

Here are the chicklets that I created. Enjoy.

I would appreciate a credit wherever possible.

Thanks
Frank

If you like the chicklets, consider donating any amount:

Ruby on Rails with Apple

2006-03-02T20:46:00.000-08:00

Apple has finally noticed Ruby on Rails and published a tutorial about it: Using Ruby on Rails for Web Development on Mac OS X

"The Ruby on Rails web application framework has built up a tremendous head of steam over the last year. Fueled by some significant benefits and an impressive portfolio of real-world applications already in production, Rails is destined to continue making significant inroads in 2006. Simply put, Ruby on Rails is an open source tool that gives you the advantage of rapidly creating great web applications backed by SQL databases to keep up with the speed of the web. And with the release of Rails 1.0 kicking off the new year, there's never been a better time to climb aboard."

I was going to buy Textmate but it sucks that it is available for only MAC OSX

Lucene "Lock obtain timed out"

2006-02-27T11:08:00.000-08:00

Today I had to interrupt my Java search server while it was indexing. Next time when I ran the server, it kept giving me the following messages:

caught a class java.io.IOException
with message: Lock obtain timed out: Lock@/tmp/lucene-bc34bb2d3ec966220086135e748049c5-write.lock

Solution was to delete the /tmp/lucene-* files.

SQLException: Before start of result set

2006-02-25T19:18:00.000-08:00

Today I was getting this error when making a SELECT query. This error is raised typically because you didn't call resultset.first() or resultset.next() function.

So before using a field from a record in MySQL

if ( Portal != null && Portal.next() ){
url = "//"+Portal.getString("portal_url")+".domain.com/"+ RS.getString("permalink");
}

Lucene Term Vectors

2006-02-25T09:55:00.001-08:00

Using term vectors, we can provide choices to the users of our application that match the current choice. For instance, on a site that I am developing, I plan to use term vectors to offer my site users the ability to see "related articles" when they are reading an article.

Term Vectors are specified by setting an instance of Field.TermVector to true when calling a method similar to the following:

Field(String, String, Field.Store, Field.Index, Field.TermVector)

If you don't want to store the term vector

Field(name, value, Field.Store.YES, Field.Index.TOKENIZED)

If you do want to store the term vector

Field(name, value, Field.Store.YES, Field.Index.TOKENIZED, storeTermVector)

Term vector can also be stored for "Unstored" fields:
Don't store term vector, but tokenize and index the field, without storing the field

Field(name, value, Field.Store.NO, Field.Index.TOKENIZED)

If you do want to store term vector, tokenize and index the field, but not storing it in the index:

Field(name, value, Field.Store.NO, Field.Index.TOKENIZED, storeTermVector)

To find out whether term vector is stored for a field, we can use: isTermVectorStored

public final boolean isTermVectorStored()
IndexReader.getTermFreqVector(int,String)
IndexReader.getTermFreqVector(int, String)

Note from the manual about the above:

These methods do not provide access to the original content of the field, only to terms used to index it. If the original content must be preserved, use the stored attribute instead.

Other related functions:

isStoreOffsetWithTermVector

isStorePositionWithTermVector

Lucene Term Vectors

2006-02-25T09:55:00.000-08:00

Field(String, String, Field.Store, Field.Index, Field.TermVector)

If you don't want to store the term vector

Field(name, value, Field.Store.YES, Field.Index.TOKENIZED)

If you do want to store the term vector

Field(name, value, Field.Store.YES, Field.Index.TOKENIZED, storeTermVector)

Term vector can also be stored for "Unstored" fields:
Don't store term vector, but tokenize and index the field, without storing the field

Field(name, value, Field.Store.NO, Field.Index.TOKENIZED)

If you do want to store term vector, tokenize and index the field, but not storing it in the index:

Field(name, value, Field.Store.NO, Field.Index.TOKENIZED, storeTermVector)

To find out whether term vector is stored for a field, we can use: isTermVectorStored

public final boolean isTermVectorStored()
IndexReader.getTermFreqVector(int,String)
// TermFreqVector myTermFreqVector = myreader.getTermFreqVector(id, "field_name");
IndexReader.getTermFreqVector(int, String)

Note from the manual about the above:

These methods do not provide access to the original content of the field, only to terms used to index it. If the original content must be preserved, use the stored attribute instead.

Other related functions:

isStoreOffsetWithTermVector

isStorePositionWithTermVector

Vectors in Java

2006-02-25T09:17:00.000-08:00

Since I have been working on integrating Lucene, my current posts will talk more about Java than anything else.

What are Vectors?
Vectors defined in java.util package.

import java.util.Vector;

Think of them as arrays that dynamically resize.
Vectors are slower than arrays.

Sample usage

vec = new Vector();
v.addElement(myArticle);
for(int i=0;i<index;i++)
{
myArticle=(Article)vec.elementAt(i);
}

Lucene Field Types

2006-02-25T09:06:00.000-08:00

The following are the field types in Lucene for my (and your) reference

Text: "tokenized and indexed, and is stored in the index" "Term vector will not be stored for this field"

Field.Store.YES, Field.Index.TOKENIZED
Field(name, value)
Field(name, value, storeTermVector)
Field(name, value, Field.Store.YES, Field.Index.TOKENIZED, storeTermVector)
Field(name, value, Field.Store.YES, Field.Index.TOKENIZED)

Unindexed: "not tokenized nor indexed, but is stored in the index"

Field.Index.NO
e.g. Field(name, value, Field.Store.YES, Field.Index.NO)

Unstored: "tokenized and indexed, but that is not stored in the index"

Field(name, value, Field.Store.NO, Field.Index.TOKENIZED)
and
Field(name, value, Field.Store.NO, Field.Index.TOKENIZED, storeTermVector)

Keyword: "not tokenized, but is indexed and stored"

Field(name, value, Field.Store.YES, Field.Index.UN_TOKENIZED)

org.apache.lucene.document.Field has been deprecated

2006-02-25T08:41:00.000-08:00

I have been working on getting Lucene to work with Ruby on Rails. In my SearchServer.java, I kept getting the following messages on compile:

Note: SearchServer.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: SearchServer.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

Then I executed:

javac SearchServer.java -Xlint:deprecation

and got the output:

SearchServer.java:297: warning: [deprecation] Text(java.lang.String,java.lang.String) in org.apache.lucene.document.Field has been deprecated
doc.add(Field.Text("title", RS.getString("title")));
^
SearchServer.java:298: warning: [deprecation] Text(java.lang.String,java.lang.String) in org.apache.lucene.document.Field has been deprecated
doc.add(Field.Text("type", "article"));
^
SearchServer.java:299: warning: [deprecation] Text(java.lang.String,java.lang.String) in org.apache.lucene.document.Field has been deprecated
doc.add(Field.Text("author", RS.getString("author")));
^
SearchServer.java:300: warning: [deprecation] Text(java.lang.String,java.lang.String) in org.apache.lucene.document.Field has been deprecated
doc.add(Field.Text("body", RS.getString("body")));
^
SearchServer.java:301: warning: [deprecation] Text(java.lang.String,java.lang.String) in org.apache.lucene.document.Field has been deprecated
doc.add(Field.Text("extended", RS.getString("extended")));
^
SearchServer.java:302: warning: [deprecation] Text(java.lang.String,java.lang.String) in org.apache.lucene.document.Field has been deprecated
doc.add(Field.Text("tags", RS.getString("tags")));

warning: [deprecation] UnIndexed(java.lang.String,java.lang.String) in org.apache.lucene.document.Field has been deprecated

After researching online I confirmed that the document.Field has infact been deprecated. What this means is that if you were to upgrade Lucene these functions may no longer be available.

The correct functions are mentioned in the Lucene demos that come with 1.9

/**
* Copyright 2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

.................

public class FileDocument {
/** Makes a document for a File.
<p>
The document has three fields:
<ul>
<li><code>path</code>--containing the pathname of the file, as a stored,
untokenized field;
<li><code>modified</code>--containing the last modified date of the file as
a field as created by <a
href="lucene.document.DateTools.html">DateTools</a>; and
<li><code>contents</code>--containing the full contents of the file, as a
Reader field;
*/
public static Document Document(File f)
throws java.io.FileNotFoundException {

// make a new, empty document
Document doc = new Document();

// Add the path of the file as a field named "path". Use a field that is
// indexed (i.e. searchable), but don't tokenize the field into words.
doc.add(new Field("path", f.getPath(), Field.Store.YES, Field.Index.UN_TOKENIZED));

// Add the last modified date of the file a field named "modified". Use
// a field that is indexed (i.e. searchable), but don't tokenize the field
// into words.
doc.add(new Field("modified",
DateTools.timeToString(f.lastModified(), DateTools.Resolution.MINUTE),
Field.Store.YES, Field.Index.UN_TOKENIZED));

// Add the contents of the file to a field named "contents". Specify a Reader,
// so that the text of the file is tokenized and indexed, but not stored.
// Note that FileReader expects the file to be in the system's default encoding.
// If that's not the case searching for special characters will fail.
doc.add(new Field("contents", new FileReader(f)));

// return the document
return doc;
}

XMLRPC::FaultException

2006-02-24T13:32:00.000-08:00

If you are getting this message, check your Ruby on Rails logs.

XMLRPC::FaultException (java.lang.Exception: RPC handler object not found for "test": No default handler registered):
/usr/local/lib/ruby/1.8/xmlrpc/client.rb:403:in `call'

Typically, it means that you do not have a default handler registered.

A default handler is registered using something like (Thanks Erik):

WebServer server = new WebServer(port);
server.addHandler("$default", new SearchServer
(FSDirectory.getDirectory(indexPath, false)));

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/codec/DecoderException

2006-02-24T13:26:00.000-08:00

Do I hate Java or what? I have been trying to compile a searchServer program but was stuck on the following error for quite long:

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/codec/DecoderException

I had placed the commons-codec-1.2.jar in my class path when compiling using -cp and was including the needed classes in my program via import.

The solution was to add the path to commons-codec-1.2.jar in my .bashrc file and then export it.

Frank

Errno::ENOENT when opening URL

2006-02-23T11:22:00.000-08:00

If you are trying to open a URL and are getting the error mesage:

Errno::ENOENT

Make sure you have this statement:

require 'open-uri'

HTTPS open-uri : basic authentication over SSL

2006-02-21T10:29:00.000-08:00

Today I was looking for a way to open HTTPS urls with basic authentication. While looking, I came across this post wheich shows you how to patch open-uri to work with HTTPS.

I ended up using 'net/https' with 'net/http' to implement the basic authentication over SSL. So try it at your own risk and if it works, let me know ;)
Re: Patch that enables https in open-uri.rb

Here is the patch by Tanaka Akira

Index: lib/open-uri.rb
===================================================================
RCS file: /src/ruby/lib/open-uri.rb,v
retrieving revision 1.28
diff -u -p -r1.28 open-uri.rb
--- lib/open-uri.rb 5 Feb 2005 14:13:27 -0000 1.28
+++ lib/open-uri.rb 5 Feb 2005 14:14:25 -0000
@@ -539,9 +539,8 @@ module URI
header['host'] += ":#{uri.port}" if uri.port
end

- require 'net/http'
resp = nil
- Net::HTTP.start(self.host, self.port) {|http|
+ http_start(self.host, self.port) {|http|
http.request_get(uri.to_s, header) {|response|
resp = response
if options[:content_length_proc] && Net::HTTPSuccess === resp
@@ -576,11 +575,32 @@ module URI
end

include OpenURI::OpenRead
+
+ private
+ def http_start(host, port, &block)
+ require 'net/http'
+ Net::HTTP.start(host, port, &block)
+ end
end

class HTTPS
- def proxy_open(buf, uri, options) # :nodoc:
- raise ArgumentError, "open-uri doesn't support https."
+ private
+ def http_start(host, port, &block)
+ require 'net/https'
+ http = Net::HTTP.new(host, port)
+ http.verify_mode = OpenSSL::SSL::VERIFY_PEER
+ setup_ca_certificates(http)
+ http.use_ssl = true
+ http.start(&block)
+ end
+
+ def setup_ca_certificates(http)
+ if File.file? '/etc/ssl/certs/ca-certificates.crt'
+ # Debian ca-certificates package
+ http.ca_file = '/etc/ssl/certs/ca-certificates.crt'
+ else
+ raise SecurityError, 'CA certificates not found'
+ end
end
end

For those interested in how exactly I did Basic Authentication over SSL:

require 'net/http'
require "net/https"
@http=Net::HTTP.new('www.site.com', 443)
@http.use_ssl = true
@http.start() {|http|
req = Net::HTTP::Get.new('/file')
req.basic_auth 'user', 'pass'
response = http.request(req)
print response.body
}

If you want to test the above out, try
Blogger API

Rails SOAP API XML-RPC

2006-02-20T21:16:00.000-08:00

Ryan shows us how we can create a weblogupdates.ping XML-RPC client and server using Ruby on Rails.

Ryan's Scraps - Creating weblogUpdates.ping SOAP web services with Rails

Ruby Encrypt/Encode using digest/sha1

2006-02-20T21:08:00.000-08:00

To encode strings:

Digest::SHA1.hexdigest "frankmash.blogspot.com"
=> "443072b4f12ca8796d901d5dce40924ef3c414fd"

HABTM and attributes: Adding to self referential relations

2006-02-19T22:08:00.000-08:00

One way you can add to a self referential relationship:
self.links << wp unless self.links.include?(wp)

and another way to add with attributes:


 self.links.push_with_attributes(wp, { "link_text" => url[1] } ) unless self.links.include?(wp)

Multiple line regular expressions

2006-02-19T16:54:00.000-08:00

Today I was looking for a way to remove javascript from HTML pages. The main problem was that regular expressions hardly take into account multiple lines. So after thinking quite a bit (and being unable to find a solution), I finally decided to do a little hack to solve my problem.

What was the hack? To convert all newline characters in HTML text to a temporary marker, apply the regular expression, and then convert them back.

originalresponse=originalresponse.gsub(/(\r\n|\n|\r)/,'[[[NEWLINE]]]')

originalresponse=originalresponse.gsub(/<script([^>]+)>.*?<\/script>/,'')

originalresponse=originalresponse.gsub('[[[NEWLINE]]]',"\n")

"No such file to load -- spark.rb"

2006-02-19T14:18:00.000-08:00

If you are getting the following error:

"No such file to load -- spark.rb"

Make sure your app can read the spark.rb file in lib directory.

Frank

Radio Shack Falls for Microsoft - Costs the Company 700 Stores?

2006-02-18T14:54:00.000-08:00

The Seattle Times: Business : "DALLAS — RadioShack's troubles deepened Friday, as the electronics retailer announced it would close up to 10 percent of its 7,000 stores after a report of weak fourth-quarter earnings.

At an investment conference at RadioShack's Fort Worth, Texas, headquarters, where the news was released, President and Chief Executive David Edmondson apologized to investors over 'misstatements' on his résumé."

Yet another reason why Radio Shack chose Windows. Now that they can't afford it, they are closing 700 stores. Smart people: Makes me wonder who else lied on their resume like David Edmondson. And they thought they were saving millions by switching to Windows.

h :: html_escape

2006-02-17T19:55:00.000-08:00

Ruby-Language

Today, I was looking for html_escape function and found it at the above URL:

197: def html_escape(s)
198: s.to_s.gsub(/&/n, '&').gsub(/\"/n, '"').gsub(/>/n, '>').gsub(/</n, '<')
199: end
200: alias h html_escape

HABTM - Self Referential - Checking Whether An Association already exists

2006-02-16T20:39:00.000-08:00

I am loving Rails. Today I found a cool way to check whether an association already exists in a habtm relationship

member1=Member.find(1)
member2=Member.find(2)

member1.friends << member2 unless member1.friends.include?(member2)

Pretty cool, eh?

Ruby Rails - Cool Routes.rb tip

2006-02-14T01:20:00.000-08:00

Just found this cool routes.rb tip for custom routes:

Technoblog: Rails Routes - :controller/:action/:id VS. :controller/:id/:action: "Which allows me to change URLs like:http://somesite.com/person/show/123Into:http://somesite.com/person/123And:http://somesite.com/person/edit/123Into:http://somesite.com/person/123/edit"

Rails - Record Not Inserting - Record Not Updating

2006-02-13T19:53:00.000-08:00

If your ActiveRecord model class is not inserting or updating objects, try making sure that the before_save function is not returning false.

-- Frank

acts_as_taggings : plugin vs gem

2006-02-13T10:47:00.000-08:00

I asked the following question on the Ruby on Rails list:

I have gotten acts_as_taggable to work for a test application as documented on taggable.rubyforge.org

I am following Chad's excellent examples in ROR Recipes Beta book.

I have a few questions and hope that Chad or some other expert can help clarify them.

1. Why is the book suggesting to use taggings table instead of tags_contacts, as mentioned on taggable.rubyforge.org?
2. How can I use this taggings table instead of my tags_contacts?
3. How can I store additional fields such as member_id in the tags_contacts table or taggings table?
4. When I follow Chad's example on my Favorite class, (with tags_favorites and taggings table created) I keep getting the NoMethodError for "tag_with"? At first I thought this may be because I am using taggings table but then when I created tags_favorites table the error persisted.
5. I finally used the tag method as described on rubyforge.org and it works. So my question is, is tag_with a typo in the book or am I missing something?
6. Why does the following output say @new_record=false even when the record was created? Is it to prevent further entry of the same record?

The following are the responses by list members:

Michael Yacavone said:

The acts_as_taggable in the ROR Recipes book uses the _plugin_ written by DHH, not the _gem_ on rubyforge. Unfortunately, the plugin is not documented outside the ROR Recipes book right now.

Until DHH documents the plugin we're going to have dozens or hundreds of messages of confusion like this. Even then, the namespace collision will provide months of amusement.

To my surprise, David Heinemeier Hansson (Yes, DHH) replied:

Now here's the truly wonderful part of open source: Creator, maintainer, and documentor needs not all be caps on the same schmoe. Thus, if you find something useful, say a plugin like acts_as_taggable with the creator stamp DHH, you can choose to express your gratitude through one of the other caps.

That may be a patch to extend or it may be a tutorial about its usage or even READMEs and RDocs for the source. So try not to assume that creator equals sole maintainer or documentor. Only try to understand the truth: There is no vendor.

Michael replied back saying

I am actually trying to get a grip on this to help, which happens to be challenging for my skill level.

But when the top dog of Rails creates a namespace clash with a well-known gem, it sure would be nice to have some leadership and not defer to the magic of open-source community to sort it out eventually. Better to just say, "We're up against a new product release, and will get to this someday soon," or somesuch, which is probably pretty close to the truth.

Thought experiment: If someone else had released a plugin with the same name as a well-known gem, would the community have accepted it, or would they encourage the creator to change the name to avoid confusion? I assert that 1) the creator would have been encouraged to change the name, and 2) it is because DHH is the creator this didn't happen.

Of course, let a thousand flowers bloom, just don't expect this question to go away anytime soon.

And then

I have written a weblog entry which hopefully clarifies the situation as I understand it, and will eventually hit the Google index for future queries.
http://www.notio.com/2006/02/rails_acts_as_t.html

David then replied:

>" But when the top dog of Rails creates a namespace clash with a well-known gem, it sure would be nice to have some leadership and not defer to the magic of open-source community to sort it out eventually.

Namespace clashes are problematic for packages that wants to be used concurrently, not for alternatives. How would the situation have improved if I had called it acts_as_polymorphically_taggable (except for making jokes about such a terrible, terrible name)? Would we not have had the same questions as to what does what and why? Of course we would.

In any case, let me summarize the difference quickly. The main difference is not plugin vs gem, but rather that my version of acts_as_taggable is designed to work with multiple classes. So a single tag can be used in the tagging of multiple classes. This requires polymorphic associations and join models, which is why it only works Edge Rails (and will work in the forthcoming 1.1).

So if you need that feature, tagging of multiple classes with the same tags, then use my version. Otherwise, the old version is probably better. It's certainly more feature-rich and better documented.

My thanks to David and Michael for their clarifications.

Frank

Tag expected, got String

2006-02-12T19:29:00.000-08:00

If you are getting this error and you are using acts_as_taggable, the solution is to add/edit the following in _form.rhtml or related file:

< input id="tags" name="tags" size="30" type="text" value="" />

ActiveRecord::Migration

2006-02-12T14:56:00.000-08:00

Documentation on how to use ActiveRecord::Migration

Rails Interesting Posts

2006-02-11T11:14:00.000-08:00

Some very interesting posts on Planet Rails that caught my eye.

Jonathan writes about Time-based Fragment Caching with MemCache.
Lucas Carlson talks about "Debunking strong misconceptions about cross-domain AJAX security issues.
Edge Rails
Option Mode for TinyMCE, a Javascript WYSIWYG editor
DHH interviewed by MySQL using WriteBoard.

P.S. I have submitted a request for this blog to be added and am patiently waiting :).

EdgeRails in Ruby on Rails

2006-02-11T10:57:00.000-08:00

I was looking for a way to move to EdgeRails. A commenter on Ruby on Rails provided me with the following link:

EdgeRails in Ruby on Rails: "Edge Rails is a term that means you are running a local copy of the latest SVN trunk of Rails, instead of using gems. By checking out the trunk into your /vendor dir, Rails will automatically use that instead of the gems installed on your machine."

The above page tells you all about how you can move to EdgeRails whether you are using SVN or gems
--Frank

String in Ruby:Strings Manual

2006-02-09T09:25:00.000-08:00

Lots of Ruby String Goodies:

"A String object holds and manipulates an arbitrary sequence of bytes, typically representing characters. String objects may be created using String::new or as literals (see page 204).Because of aliasing issues, users of strings should be aware of the methods that modify the contents of a String object. Typically, methods with names ending in ``!'' modify their receiver, while those without a ``!'' return a new String. However, there are exceptions, such as String"

mixins: <, <=, ==, >=, >, between?
class methods: new String.new( aString ) -> aNewString
instance methods: % str % arg -> aString
* str * anInteger -> aString
+ str + aString -> aNewString
<<
str << aFixnum -> str
str << anObject -> str
<=> str <=> aString -> -1, 0, +1
== str == anObject -> true or

false

and more

Rails acts_as_threaded plugin

2006-02-08T22:32:00.000-08:00

Bob Silva has a wonderful plugin complete with screencast on his web site. If you are looking to add forum capability to your site, his plugin acts_as_threaded will work great. I implemented it in my application in less than 30 minutes.

Here is a quote from Bob Silva:

6 short of a dozen: "I've included an 11 minute screencast of building an ugly looking Threaded Forum, but the concepts are there. I can still remember spending many man hours with my programming team at Bravenet to design and build the forum product we offered there. If Rails existed back then, we could have built it in a day. (Leave me a comment on how the screencast turned out.)"

Make sure you don't name you model "Thread" as "thread" is a reserved word in ROR.

Frank

Rails Paginate DESC and notes

2006-02-07T12:30:00.000-08:00

One way to specify the order:

@article_pages, @articles = paginate :articles, :order_by=> "created_at DESC", :per_page => 10

Reverse the list

for post in posts.reverse

Take everything within

for article in articles

and put it in _article.rhtml. Then replace the remaining "for" block with this line:

<%= render :partial => "article", :collection => @articles %>

We can place the above line in show.rhtml or whereever we like.

Using partial in views and controllers

2006-02-05T20:20:00.000-08:00

In views/unajax/index.rhtml

<ul id="items"><br /><%= render(:partial => 'item', :collection => @items) %><br /></ul><br />

In controllers/unajax_controller.rb
<br />def<br />item = Item.new(params[:item_body])<br />render(:partial => "item", :object => item, :layout => false)<br />end<br />
And in views/unajax/_item.rhtml

<li><br /><p><br /><%= item.posted_on.strftime("%H:%M:%S") %>:<br /><%= h(item.body) %><br /></p><br /></li><br />
Notes from Agile devel book

Rails: Commuincating between action level layout and global layout

2006-02-05T20:09:00.000-08:00

Today I learned a cool new trick.

Lets say you have a controller named blog_controller.rb that uses "global" layout named default:

layout 'default'

And you have a views/blog/index.rhtml template (action level layout)
then you can communicate between the two using "content_for" variables:

For example, I can create a variable called @content_for_my_javascripts in views/blog/index.rhtml using

<% content_for("my_javascripts") do -%>
# javascript code here
<% end -%>

Now I can place the following in my global template (views/layout/default.rhtml) to put these javascripts there

It seems that "action level layout templates" are rendered before the "global layout templates"

Cool eh

Rails - Paginate a collection or an array

2006-02-05T18:45:00.000-08:00

Yesterday, I was looking for a way to paginate my collection. While searching online I found this wonderful snippet by Canadaduane that does the job very neatly.

def paginate_collection(collection, options = {})
default_options = {:per_page => 10, :page => 1}
options = default_options.merge options

pages = Paginator.new self, collection.size, options[:per_page], options[:page]
first = pages.current.offset
last = [first + options[:per_page], collection.size].min
slice = collection[first...last]
return [pages, slice]
end

The above snippet can be invoked using

@pages, @users = paginate_collection User.find_custom_query, :page => @params[:page]

Access the original post: Paginate an already-fetched result set (i.e. collection or array)
Also check out snippet by toolmantim on the above URL for block.

Rails MySQL Enum Patch

2006-02-05T09:37:00.000-08:00

Andrey Tarantsov posted a patch on the Ruby on Rails list that can help you with adding Enum functionality to Rails. Enum functionality is not added by default.

Hello!

I've modified ActiveRecord a bit to support enum columns. This is
tested
only with MySQL, and maybe needs some changes for other adapters (if
they use another syntax or quoting style).

I believe this patch should be tested well, so I haven't (yet) tried to
post it to the official Trac. It is also not solid-as-a-rock when it
comes to quoting ENUM values.

After applying this thing, rake db_schema_dump properly handles enum
columns, and also it's possible to write migrations like this:

add_column :users, :level, :enum, :limit => ['viewer', 'author',
'admin']

Observe that I'm (over)using the limit field to specify ENUM values.

Here's the patch.

Index:
activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
===================================================================
---
activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
(revision 3486)
+++
activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb
(working copy)
@@ -235,7 +235,15 @@

def type_to_sql(type, limit = nil) #:nodoc:
native = native_database_types[type]
- limit ||= native[:limit]
+ # this is a special case, because data type differs
+ case type
+ when :enum
+ fail ":enum column limit must be specified" if limit.nil?
+ fail ":enum column limit must be an array" unless
limit.is_a? Array
+ limit = limit.collect {|n| "'#{n}'"}.join ","
+ else
+ limit ||= native[:limit]
+ end
column_type_sql = native[:name]
column_type_sql << "(#{limit})" if limit
column_type_sql
Index:
activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
===================================================================
---
activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
(revision 3486)
+++
activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
(working copy)
@@ -18,7 +18,7 @@
@sql_type = sql_type
# have to do this one separately because type_cast depends on
#type
@default = type_cast(default)
- @limit = extract_limit(sql_type) unless sql_type.nil?
+ @limit = extract_limit_or_enum_values(sql_type) unless
sql_type.nil?
@primary = nil
@text = [:string, :text].include? @type
@number = [:float, :integer].include? @type
@@ -44,6 +44,7 @@
when :text, :string then String
when :binary then String
when :boolean then Object
+ when :enum then Symbol
end
end

@@ -61,6 +62,7 @@
when :date then self.class.string_to_date(value)
when :binary then self.class.binary_to_string(value)
when :boolean then self.class.value_to_boolean(value)
+ when :enum then value.intern
else value
end
end
@@ -77,6 +79,7 @@
when :date then
"#{self.class.name}.string_to_date(#{var_name})"
when :binary then
"#{self.class.name}.binary_to_string(#{var_name})"
when :boolean then
"#{self.class.name}.value_to_boolean(#{var_name})"
+ when :enum then "#{var_name}.to_s.intern"
else nil
end
end
@@ -135,6 +138,26 @@
$1.to_i if sql_type =~ /$(.*)$/
end

+ def extract_enum_values(sql_type)
+ paren_string = $1 if sql_type =~ /$(.*)$/
+ return [] if paren_string.nil?
+ values = []
+ paren_string.split(",").each do |item|
+ item.strip!
+ item = item[1..-2] if item[0] == ?' && item[-1] == ?' #
remove quoting
+ values << item
+ end
+ values
+ end
+
+ def extract_limit_or_enum_values(sql_type)
+ if type == :enum
+ extract_enum_values(sql_type)
+ else
+ extract_limit(sql_type)
+ end
+ end
+
def simplified_type(field_type)
case field_type
when /int/i
@@ -157,6 +180,8 @@
:string
when /boolean/i
:boolean
+ when /enum/i
+ :enum
end
end
end
Index:
activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
===================================================================
--- activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
(revision 3486)
+++ activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
(working copy)
@@ -107,7 +107,8 @@
:time => { :name => "time" },
:date => { :name => "date" },
:binary => { :name => "blob" },
- :boolean => { :name => "tinyint", :limit => 1 }
+ :boolean => { :name => "tinyint", :limit => 1 },
+ :enum => { :name => "enum", :limit => [] }
}
end

--

Rails - Generating Documentation

2006-02-04T13:32:00.000-08:00

To generate documentation for your application, simply run

rake appdoc

from within your app's directory.

Render Component

2006-02-04T12:44:00.000-08:00

I was trying to put my login form on the home page and wanted to document the steps:

Put

<%= render_component :controller => "member", :action => "login", :layout => false, :params => { "member[login]" => "" } %>

in show.rhtml and have the layout turned off.

render (:layout=>false)

The above will not show any layout if placed in a function.

Also see:

# Renders the template for the action "goal" within the current controller
render :action => "goal"

# Renders the template for the action "short_goal" within the current controller,
# but without the current active layout
render :action => "short_goal", :layout => false

# Renders the template for the action "long_goal" within the current controller,
# but with a custom layout
render :action => "long_goal", :layout => "spectacular"

from ActionController/Base
Render component infinite loop

Creating relations between two models - Active Records

2006-01-29T11:26:00.000-08:00

This post will show you how you can create relations between two tables / models / Active Records.

For example, I have a resources table and a categories table and I would like to make sure that when adding another resource I can choose / select a category.

Vice versa, I would like to be able to get the resources that belong to a category.

We'll assume all the tables we need exist with the proper field names.

For my application:
A portal has many categories
A category has many resources
A tag has many resources

I will be creating some relations here, but you should get the idea.

Open resource.rb (the model which will have categories) and add

belongs_to :category

Open category.rb, and put

has_many :resources

We just told Rails that a resource belongs to a single category and that a category can have many resources.

So what do these declarations do? After putting these declarations, we can use:

@resource.category.category_name

Assuming we have @category containing a category object, the following will get all resources that belong to that category

@category.resources

In resource_controller.rb, we can now change our edit and new functions and add the following so we can have a collection available when we are adding or editing resources.

@categories = Category.find_all

Then in our edit.rhtml and new.rhtml we can put something like:
<select name="resource[category_id]">\n <% @categories.each do |category| %> \n <option value="<%= category.id %>" \n <%= ' selected' if category.id == resource.category_id %>> \n <%= category.name %> \n </option> <% end %></select>

Finding the records and displaying them

2006-01-29T11:03:00.000-08:00

In *_controller.rb (resource_controller.rb for our example) we can get all the resources from the database in our function using

@resources = Resource.find_all

Then we can traverse through them in .rhtml file using

<% @resources.each do |resource| %>

<%= link_to resource.title, :action => "show", :id => resource.id %>
<%= resource.date %>

<% end %>

Template is missing - Ruby on Rails

2006-01-29T10:56:00.000-08:00

When using scaffolding, if you override a default function such as list, you'll get the message that says something like:

Template is missing

To correct this create the appropriate list.rhtml file in correspoding views directory.

Scaffolding: Using scaffolds in Ruby on Rails

2006-01-29T10:52:00.000-08:00

To use the power of scaffolding (aka scaffold / scaffolds), place the following line in your *_controller.rb (resource_controller.rb) file
scaffold :resouce

or generate scaffolding using
ruby script/generate scaffold resource

Ruby on Rails - Tagging with taggable

2006-01-28T13:05:00.000-08:00

For Ruby on Rails programmers, there is a cool gem named acts_as_taggable that can be used to quickly and easily implement tagging within your applications.

Installing acts_as_taggable

gem install acts_as_taggable
# output follows
Attempting local installation of 'acts_as_taggable'
Local gem file not found: acts_as_taggable*.gem
Attempting remote installation of 'acts_as_taggable'
Updating Gem source index for: http://gems.rubyforge.org
Successfully installed acts_as_taggable-1.0.4
Installing RDoc documentation for acts_as_taggable-1.0.4...

Open config/environment.rb and put the following line:

require_gem ‘acts_as_taggable‘

See taggable on RubyForge.org for more info.

Create a table named tags for holding tag names.

id (primary key)
name (varchar)

CREATE TABLE `tags` (
`id` INT NOT NULL AUTO_INCREMENT ,
`name` VARCHAR( 255 ) NOT NULL ,
PRIMARY KEY ( `id` ) ,
INDEX ( `name` )
) TYPE = MYISAM CHARACTER SET utf8 COLLATE utf8_general_ci COMMENT = 'tags';

Generate an ActiveRecord model class named "Tag"

[frank@srv30 ror]# ruby script/generate model Tag
exists app/models/
exists test/unit/
exists test/fixtures/
create app/models/tag.rb
create test/unit/tag_test.rb
create test/fixtures/tags.yml

Open up models/tag.rb and modify your model as follows:

class Tag < ActiveRecord::Base
acts_as_taggable
end

Now, we need to create join tables. According to the RDoc for acts_as_taggable:

If you´re using the simple has_and_belongs_to_many model, you must NOT have a primary key (usually an ‘id’ column) defined on the join table. If you´re using a full join model, you must add a primary key column to the join table. Please see the RDoc documentation on acts_as_taggable macro and the :join_class_name option for the differences between these two approaches.

Since I am interested in creating a join table for resources, I will call my table tags_resources. This table will have two fields

tag_id
resource_id

HTTP URL validation

2006-01-25T22:41:00.000-08:00

A post by Nathaniel Steven on Ruby on Rails list caught my eye. He was answering a question for someone asking for HTTP URL validation plugin.

He suggests to add the following regular expression "as a define
or even as a helper to AR in the format of "validates_format_of_url
:url" to be a shorthand for the REGEX."

class Company < ActiveRecord::Base
validates_format_of :url, :with =>
/^(http|https):\/\/[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}(([0-9]{1,5})?\/.*)?$/ix
end

Thank you Nathaniel for sharing this.
Frank

Using the place holder syntax to protect against SQL injection attacks in Ruby on Rails.

2006-01-25T22:26:00.000-08:00

Worried about how to protect against SQL injection attacks in Ruby on Rails, I posted a question to Ruby on Rails list. My question (in response to an ongoing discussion) was:

No, I am not using a direct value from the forms.

However, I would appreciate if you can tell me how would one add slashes to the string, or replace the quotes from the input value. I know it can be done in PHP using addslashes and str_replace. What are the appropriate functions in Ruby on Rails?

I am sure many of us starting out on ROR would benefit from your answer.

Thanks for your assistance.

Ezra Zygmuntowicz was quick to come to my rescue. She says

Frank-
You do not need to call any special functions to add slashes or escape things for the database in rails as long as you use the place holder syntax. So if you just get in the habit of always using the ? placeholders like you were shown with the snippet below, you will not have to worry about escaping anything before inserting or querying the db:
def self.home_categories (portal_id)
find(:all, :conditions => [ "portal_id=?", portal_id ] )
end

This is the important syntax:

:conditions => [ "portal_id=?", portal_id ]

Cheers-

-Ezra

Thanks to Ezra for her assistance.

Frank

Using Parameters with a string

2006-01-25T18:54:00.000-08:00

I posted my first question to the Ruby on Rails list and got an answer right away.

My question:

Hello,

I am learning Ruby on Rails and have a very basic question.

def self.home_categories (portal_id)
find(:all,
:conditions => "portal_id=:portal_id"
)
end

How can I put the value of portal_id in the string "portal_id=...". I tried concatenation but I get the error that it cannot convert.

I can figure it out eventually but thought someone may have the answer ready.

Thanks
Frank

The answers I received:

From Justin Bailey

Easy, ruby can embed expressions into strings:

def self.home_categories (portal_id)
find(:all,
:conditions => "portal_id=#{portal_id}"
)
end

The #{..} syntax acts like ruby code inside your string, so the value
of portal_id gets into your conditions.

Now, the fact you are putting this value directly into a SQL statement
might be troubling - it it's from some sort of form submission or URL
you are opening yourself to SQL injection attacks there.

Eric Goodwin said:

Hey, You probably want something like this

def self.home_categories (portal_id)
find(:all, :conditions => [ "portal_id=?", portal_id ] )
end

Using and defining functions in Ruby on Rail

2006-01-25T15:42:00.000-08:00

Simple function definition

def self.home_categories (portal)
end

Calling this function
@categories = Category.home_categories (:current_portal)

Simple find

find(:all, 
       :conditions => "portal_id=1"#, #date_available <= now()
#       :order => "" #date_available desc
  )

Ruby on Rails routing

2006-01-24T22:43:00.000-08:00

To route Ruby on Rails requests, something like the following works for me:

#BEGIN ROR
# General Apache options
#Options +FollowSymLinks +ExecCGI
AddHandler fastcgi-script .fcgi
AddHandler cgi-script .cgi
RewriteCond ${lowercase:%{SERVER_NAME}} domain.com$
RewriteCond ${lowercase:%{REQUEST_FILENAME}} !\.js$
RewriteCond ${lowercase:%{REQUEST_URI}} !\.js$
RewriteRule ^/(.*)$ /var/www/html/hosts/domain.com/docs/ror/public/dispatch.fcgi [QSA,L]
RewriteCond ${lowercase:%{REQUEST_FILENAME}} prototype.js$
RewriteRule ^/(.*)$ /var/www/html/hosts/domain.com/docs/ror/public/javascripts/prototype.js [QSA,L]
# END ROR

AJAX on Rails

2006-01-23T23:42:00.000-08:00

Put in head

<%= javascript_include_tag "prototype" %>

And then in body

<%= link_to_remote("Show the AJAX",
:update => 'mydiv',
:url => { :action => :new }) %>

This text will be changed

Ruby on Rails split / explode a string

2006-01-23T23:32:00.000-08:00

To explode or split a string using Ruby on Rails:

@m=@tag.split('-')
@my=@m[0];

Then the splitted or exploded value of the string can be accessed by using

<%= @my %>
<%= @m[0] %>
<%= @m[-1] %>

Ruby on Rails variables domain

2006-01-23T23:29:00.000-08:00

To get the value of domain names, put the following in .rhtml file

<%= request.domain(2) %>

or render_text request.domain(); in *_controller.rb file

If no argument is supplied, tld_length will default to 1.

Ruby Routes - Custom routes in Ruby

2006-01-23T20:28:00.000-08:00

Example of how you will create Ruby Routes.

map.connect ':primary/:category', :controller => 'site', :action => 'list'
map.connect 'tag/:tag', :controller => 'site', :action => 'list'
map.connect ':category', :controller => 'site', :action => 'list'

Put in routes.rb

rake stats

2006-01-20T22:10:00.000-08:00

[root@srv30 layouts]# rake stats
(in /var/www/html/hosts/socialbookmarking.org/docs/ror)
+----------------------+-------+-------+---------+---------+-----+-------+
| Name | Lines | LOC | Classes | Methods | M/C | LOC/M |
+----------------------+-------+-------+---------+---------+-----+-------+
| Helpers | 7 | 6 | 0 | 0 | 0 | 0 |
| Controllers | 50 | 36 | 3 | 5 | 1 | 5 |
| Components | 0 | 0 | 0 | 0 | 0 | 0 |
| Functional tests | 36 | 26 | 4 | 6 | 1 | 2 |
| Models | 6 | 6 | 2 | 0 | 0 | 0 |
| Unit tests | 20 | 14 | 2 | 2 | 1 | 5 |
| Libraries | 0 | 0 | 0 | 0 | 0 | 0 |
+----------------------+-------+-------+---------+---------+-----+-------+
| Total | 119 | 88 | 11 | 13 | 1 | 4 |
+----------------------+-------+-------+---------+---------+-----+-------+
Code LOC: 48 Test LOC: 40 Code to Test Ratio: 1:0.8

To find by tag

2006-01-20T21:06:00.000-08:00

To find by tag:

Modify list method

        def list
                # new to help find by tags
                @tag = @params['tag']
                # original before search
                @sites = Site.find_all
        end

and edit list.rhtml in views/site directory


<% @sites.each do |site| %>

<% if (@tag == nil) || (@tag == site.tag.tag)%>

and add


<%= link_to site.tag.tag,
    :action => "list",
    :tag => "#{site.tag.tag}" %>

Note that because of
:tag => "#{site.tag.tag}"
the following gets added to the URL
http://socialbookmarking.org/site/list?tag=encyclopaedia

Creating Layouts

2006-01-20T20:58:00.000-08:00

first open the *_controller.rb you want to edit. In my case, its site_controller.rb

and add the custom layout

class SiteController < ApplicationController
        # creating the layout
        layout "my-layout"

then create your template in views/layout/my-layout.rhtml and whereever you want the content of the page to appear, insert the following line
<%= @content_for_layout %>

Redirect to an action

2006-01-20T20:46:00.000-08:00

To redirect to an action after processing a request

redirect_to :action => 'list'

Find a record with the id from the link

2006-01-20T20:44:00.000-08:00

To find a record (site) from the id in the link,
Site.find(@params['id'])

To delete this record
Site.find(@params['id']).destroy

Deleting a row using delete

2006-01-20T20:42:00.000-08:00

When we add a delete link



 
        <%= link_to "(delete)",
                    {:action => "delete", :id => site.id},
                    :confirm => "Really delete #{site.title}?" %>

We get the error

“Unknown action”

However, when we create a destroy link, it works.

If we want to keep the delete link, we must add the action.


        def delete
                Site.find(@params['id']).destroy
                redirect_to :action => 'list'
        end

ActiveRecord::StatementInvalid in Site#create

2006-01-20T20:20:00.000-08:00

So I was getting the following error in my Ruby on Rails application.

Mysql::Error: Column 'added' cannot be null: INSERT INTO mytable (`added`, `highlight`, `modified`, `title`, `tags`, `tag_id`, `username`, `border`, `paid`, `desc`, `site_type`, `link`, `usersubmitted`) VALUES(NULL, '0', NULL, 'testing', '', 1, '', '0', '0', '  testing', '', 'testing', '0')

As is obvious, the column 'added' cannot be null. We can fix this by overriding the method create (this is the method where the "new" form is submitted to )

       def create
                @site = Site.new(@params['site'])
                #we were getting "added cannot be null"
                @site.added = Date.today
                @site.modified = Date.today
                if @site.save
                        redirect_to :action => 'list'
                else
                        render_action 'new'
                end
        end

Add the delete link


 
        <%= link_to "(delete)",
                    {:action => "delete", :id => site.id},
                    :confirm => "Really delete #{site.title}?" %>

Scaffold: The two in one command

2006-01-20T19:54:00.000-08:00

Instead of

ruby script/generate model Site
ruby script/generate controller Site

we can now use
ruby script/generate scaffold Site

WARNING: If the above command is run after you have created custom MVC (models, views and controller), they will be overwritten.

Ruby on Rails Update

2006-01-20T19:21:00.000-08:00

View what version of RubyGems you have installed.

[root@srv30 ror]# gem list --local

*** LOCAL GEMS ***

actionmailer (1.1.5)
    Service layer for easy email delivery and testing.

actionpack (1.11.2)
    Web-flow and rendering framework putting the VC in MVC.

actionwebservice (1.0.0)
    Web service support for Action Pack.

activerecord (1.13.2)
    Implements the ActiveRecord pattern for ORM.

activesupport (1.2.5)
    Support and utility classes used by the Rails framework.

fcgi (0.8.6.1)
    FastCGI ruby binding.

mysql (2.7)
    MySQL/Ruby provides the same functions for Ruby programs that the
    MySQL C API provides for C programs.

rails (1.0.0)
    Web-application framework with template engine, control-flow layer,
    and ORM.

rake (0.6.2)
    Ruby based make-like utility.

sources (0.0.1)
    This package provides download sources for remote gem installation

To view the version of ALL RubyGems available remotely on the rubyforge.org server

gem list --remote

The available versions are


*** REMOTE GEMS ***

action_profiler (1.0.0)
    A profiler for Rails controllers

actionmailer (1.1.5, 1.1.4, 1.1.3, 1.1.2, 1.1.1, 1.0.1, 1.0.0, 0.9.1, 0.9.0, 0.8.1, 0.8.0, 0.7.1, 0.7.0, 0.6.1, 0.6.0, 0.5.0, 0.4.0, 0.3.0)
    Service layer for easy email delivery and testing.

actionpack (1.11.2, 1.11.1, 1.11.0, 1.10.2, 1.10.1, 1.9.1, 1.9.0, 1.8.1, 1.8.0, 1.7.0, 1.6.0, 1.5.1, 1.5.0, 1.4.0, 1.3.1, 1.3.0, 1.2.0, 1.1.0, 1.0.1, 1.0.0, 0.9.5, 0.9.0, 0.8.5, 0.8.0, 0.7.9, 0.7.8, 0.7.7, 0.7.6, 0.7.5)
    Web-flow and rendering framework putting the VC in MVC.

actionservice (0.3.0, 0.2.102, 0.2.100, 0.2.99)
    Web service support for Action Pack.

actionwebservice (1.0.0, 0.9.4, 0.9.3, 0.9.2, 0.9.1, 0.8.1, 0.8.0, 0.7.1, 0.7.0, 0.6.2, 0.6.1, 0.6.0, 0.5.0)
    Web service support for Action Pack.

activerecord (1.13.2, 1.13.1, 1.13.0, 1.12.2, 1.12.1, 1.11.1, 1.11.0, 1.10.1, 1.10.0, 1.9.1, 1.9.0, 1.8.0, 1.7.0, 1.6.0, 1.5.1, 1.5.0, 1.4.0, 1.3.0, 1.2.0, 1.1.0, 1.0.0, 0.9.5, 0.9.4, 0.9.3, 0.9.2, 0.9.1, 0.9.0, 0.8.4, 0.8.3, 0.8.2, 0.8.1, 0.8.0, 0.7.6, 0.7.5)
    Implements the ActiveRecord pattern for ORM.

activesalesforce (0.0.3, 0.0.2)
    ActiveSalesforce is an extension to the Rails Framework that allows
    for the dynamic creation and management of ActiveRecord objects
    through the use of Salesforce meta-data and uses a Salesforce.com
    organization as the backing store.

activesupport (1.2.5, 1.2.4, 1.2.3, 1.2.2, 1.2.1, 1.1.1, 1.1.0, 1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0.0)
    Support and utility classes used by the Rails framework.

acts_as_paranoid (0.3.1, 0.2, 0.1.7, 0.1.6, 0.1.5, 0.1.4, 0.1.3)
    acts_as_paranoid keeps models from actually being deleted by setting
    a deleted_at field.

acts_as_shellable (0.1.0)
    An acts-as mixin providing aliases and shorthand sql generation to
    make ActiveRecord objects more usable in a shell.

acts_as_taggable (1.0.4)
    An acts-as Mixin for easy applying and searching tags/folksnomies on
    Active Record objects

acts_as_versioned (0.2.3, 0.2.1, 0.2, 0.1.3, 0.1.2)
    Simple versioning with active record models

ajax_scaffold (1.0.0)
    [Rails] Ajax scaffold.

ajax_scaffold_generator (1.0.0)
    [Rails] Ajax scaffold.

algorithm-diff (0.1)
    Computes the differences between two arrays of elements

alib (0.3.1)
    alib

allinoneruby (0.2.7, 0.2.6, 0.2.5, 0.2.4, 0.2.3, 0.2.2, 0.2.1)
    A "Just-in-Time and Temporary Installation of Ruby"

amatch (0.2.2, 0.2.1, 0.2.0, 0.1.5, 0.1.4, 0.1.3)
    Approximate String Matching library

ambient (0.1.0)
    Control an Ambient Orb or Beacon from a Ruby app.

amrita2 (1.9.6)
    Amrita2 is a a xml/xhtml template library for Ruby

an-app (0.0.3)
    This gem demonstrates executable scripts

archive-tar-minitar (0.5.1, 0.5.0)
    Provides POSIX tarchive management from Ruby programs.

archive-tarsimple (1.0.0)
    A simple way to create tar archives

arrayfields (3.5.0, 3.4.0, 3.3.0)
    arrayfields


Asami (0.04)
    Asami is a Gnome2 based Direct Connect client.

audioscrobbler (0.0.1)
    Library to submit music playlists to Last.fm

autobuild (0.5, 0.4, 0.3, 0.2, 0.1)
    Rake-based utility to build and install multiple packages with
    dependencies

aversa (0.3, 0.2, 0.1)
    Aversa is a little utility for creating and viewing BitTorrent
    metainfo files.

Bangkok (0.1.0)
    Chess game file reader and player; can turn games into MIDI files

bangkok (0.1.2, 0.1.1, 0.1.0)
    Chess game file reader and player; can turn games into MIDI files

barcode (0.2)
    Barcode classes.

bigtinker (0.93)
    bigtinker application is a many pre-loaded applets for the tinker
    framework using RubyWebDialogs.

bio (0.7.1, 0.7.0)
    BioRuby is a library for bioinformatics (biology + information
    science).

bioruby (0.6.4, 0.6.3, 0.6.2)
    BioRuby is a library for bioinformatics (biology + information
    science).

bishop (0.3.0)
    A port of the Reverend Bayesian classification library.

bits (0.1.1)
    A ruby interface for the Background Intelligent Transfer Service
    (BITS)

blinkenlights (0.0.2, 0.0.1)
    Control the Blinkenlights on your keyboard from Ruby

Bloglines4R (0.1.0)
    A library to access the Bloglines API from Ruby

BlueCloth (1.0.0, 0.0.4, 0.0.3, 0.0.2)
    BlueCloth is a Ruby implementation of Markdown, a text-to-HTML
    conversion tool for web writers. Markdown allows you to write using
    an easy-to-read, easy-to-write plain text format, then convert it to
    structurally valid XHTML (or HTML).

builder (1.2.4, 1.2.3, 1.2.2, 1.2.1, 1.2.0, 1.1.0, 1.0.0, 0.1.1, 0.1.0)
    Builders for MarkUp.

cacheAR (0.9.1, 0.9.0)
    cacheAR is a tiny Rails add-on to enable ActiveRecord caching.

cached_model (1.0.0)
    An ActiveRecord::Base model that caches records

calendar_grid (1.0.2, 1.0.1, 1.0)
    A utility to build calendars

calibre (1.1.0, 1.0.0, 0.2.0)
    A large collection of classes, modules and light-weight frameworks.

calibre-annotation (1.2.1)
    Complete Annotation Framework

calibre-ansicode (1.0.0)
    Module for working with ANSI codes.

calibre-association (1.0.0)
    Create Free Associations

calibre-basicobject (1.0.0)
    BasicObject class is essentially a Kernelless Object.

calibre-bbcode (1.0.0)
    BBCode markup tool
calibre-binaryreader (1.0.0)
    Mixin for working with Binary data.

calibre-bitmask (1.0.0)
    Provides bitmask methods.

calibre-classinherit (2.1.0)
    Provides class-level inheritance for mixin modules.

calibre-classmethods (2.0.0, 1.0.0)
    Provides class-level inheritance for included modules.

calibre-cloneable (1.0.0)
    Mixin for making a class clonable

calibre-consoleapp (0.2.0)
    Commandline to Object Mapping makes quick work of nice Console
    interfaces.

calibre-coroutine (1.0.0)
    Coroutine is a more flexible and generic type of subroutine.

calibre-crypt (0.2.0)
    Pure Ruby crypt(3) implementation.

calibre-dictionary (1.1.0, 1.0.0)
    The Dictionary class is an ordered subclass of Hash.

calibre-downloader (0.2.1)
    Download files with progress indication.

calibre-enumerablepass (2.0.0)
    Enumerable with parameter passing.

calibre-expirable (0.9.0)
    Generic expirability mixin.

calibre-floatstring (0.4.0)
    FloatString is a String with accessable character gaps.

calibre-functor (2.0.0)
    Remasterable Meta-Function as Object

calibre-heap (1.0.0)
    Simple Heap structure and sort.

calibre-inheritor (0.7.1)
    Create flexible class inheritable variables.

calibre-interval (1.0.0)
    Similar to Range but a true Interval class.

calibre-lisp (0.3.0)
    Lisp and Lisp::Format modules give Ruby a wonderfully Lisp flavor.

calibre-lrucache (1.0.0)
    Least Recently Used Cache

calibre-mathconstants (2.0.0)
    Rather complete collection of scientific constants.

calibre-methodprobe (1.0.0)
    Runtime method explorer can report the signiture of a method.

calibre-mock (0.8.0)
    Quickly create object immitations and arbitrary behavior mockups.

calibre-multiton (2.0.0, 1.1.0)
    Implementation of the Multiton design pattern.

calibre-nackclass (0.5.1)
    Nack, which stands for Not-ACKnowledged, is a more efficient tool
    for deferable errors.

calibre-nilcomparable (1.0.0)
    Has NilClass include Comparable, such that nil is always least.

calibre-nullclass (1.0.0)
    Null is a alternate to Nil that's doesn't raise NoMethodError.
                                                                                                           
calibre-one (0.3.1)
    Helper library for creating tight one-liners.

calibre-openobject (1.0.0)
    OpenObject is an improved variation of OpenStruct

calibre-paramix (1.0.0)
    Utilize mixin modules with include-time options.

calibre-pool (0.3.0)
    Gerneral implementation of a thread-safe object pool.

calibre-progressbar (1.0.0)
    Console-based Progressbar.

calibre-reference (1.0.0)
    Reference is a kind of proxy where the underlying object can be
    changed.

calibre-semaphore (1.0.0)
    Basic implementation of a counting semaphore.

calibre-stateparser (3.0.0)
    State machine based parser.

calibre-statichash (1.0.0)
    Hash with "write-once" entries.

calibre-system (1.0.0)
    System module is a central facility for platform information.

calibre-tagiterator (1.3.0)
    Iterate over tagged markup like HTML and XML.

calibre-timer (1.0.0)
    Versitile timer class which has both "alarm" and "stop-watch" modes.

calibre-tracepoint (0.9.0)
    TracePoint class ecapsulates a runtime "moment".

calibre-tuple (2.0.0)
    Fairly Standard implementation N-Tuple.

calibre-uninheritable (1.0.0)
    Uninheritable classes throws error if subclassed.

calibre-units (1.0.0)
    Complete Units System

calibre-yamlstruct (0.3.0)
    Like OpenStruct but the object is instantiated from a YAML document.

camping (1.1, 1.0)
    miniature rails for stay-at-home moms

captcha (0.1.2)
    Ruby/CAPTCHA is an implementation of the 'Completely Automated
    Public Turing Test to Tell Computers and Humans Apart'.

cardinal (0.1.0, 0.0.4)
    Ruby to Parrot compiler.

caseconverter (0.1.1, 0.1.0)
    Operations that change the casing of a string.

cast (0.0.1)
    C parser and AST constructor.

cfruby (0.9.6, 0.9.4, 0.9.3, 0.9.2, 0.9.1, 0.9.0)
    A collection of modules, classes, and tools for system maintenance
    and configuration

cgikit (1.1.0)
    CGIKit is a componented-oriented web application framework like
    Apple Computers WebObjects.  This framework services
    Model-View-Controller architecture programming by components based
    on a HTML file, a definition file and a Ruby source.

classifier (1.3.0, 1.2.0, 1.1.1, 1.1, 1.0)
    A general classifier module to allow Bayesian and other types of
    classifications.

cliblog (0.1.6, 0.1.5)
    cliblog is a command-line blog client.

cmd (0.7.2, 0.7.1, 0.7.0)
    A generic class to build line-oriented command interpreters.

cmdparse (2.0.0, 1.0.5, 1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0.0)
    Advanced command line parser supporting commands

coderay (0.5.0.100, 0.4.5.73, 0.4.3.48)
    CodeRay is a fast syntax highlighter engine for many languages.

color-tools (1.3.0, 1.2.0, 1.1.0, 1.0.0)
    color-tools provides colour space definition and manpiulation as
    well as commonly named RGB colours.

commandline (0.7.10, 0.7.9)
    Tools to facilitate creation of command line applications and
    flexible parsing of command line options.

CommandLine (0.7.1, 0.7.0, 0.6.0)
    Tools to facilitate creation of command line applications and
    flexible parsing of command line options.

complearn (0.6.2)
    The CompLearn Toolkit enables you to do data mining using data
    compression. It also allows you to do Quartet Tree Reconstruction as
    well as Support Vector Machine experiments with these techniques.

Console (0.1)
    Pure-ruby SDL-based quake-like console.

constraint (0.2, 0.1)
    Ensure that objects comply with some constraints

contxtlservice (0.1.1)
    The ContextualService library makes it easy to manage and set
    services to a single, global resource such as a database or file
    system.

copland (1.0.0, 0.8.0, 0.7.1, 0.7.0, 0.6.0, 0.4.0, 0.3.0, 0.2.0, 0.1.0)
    Copland is an "Inversion of Control" (IoC, also called "Dependency
    Injection") container for Ruby, based heavily on the HiveMind
    container for Java. It supports both type-2 (setter) and type-3
    (constructor) injection.

copland-lib (0.1.0)
    A collection of various non-core Copland services and interceptors.

copland-remote (0.1.0)
    A collection of Copland service definitions and implementations for
    dealing with remote object manipulation (i.e., via SOAP, DRb, and
    XML-RPC).

copland-webrick (0.1.0)
    A collection of various Copland services for dealing with WEBrick
    servers and servlets.

core_ex (0.4.0, 0.3.1, 0.2.0, 0.1.3, 0.1.2, 0.1.1, 0.1.0)
    CoreEx is a proposal for a standard library extension.

coverage (0.3, 0.2, 0.1)
    identifies inactive code

creditcard (1.0)
    These functions tell you whether a credit card number is
    self-consistent using known algorithms for credit card numbers.

crosscase (0.0.1)
    A mixin for auto-generating under_barred aliases for camelCased
    methods, and vice-versa.

crypt-fog (1.0.0, 0.1.0)
    crypt-fog is a simple encryption mechanism, but slightly better than
    Rot13.  It's primary goal is to provide a reasonable amount of
    obfuscation without having to resort to public/private key
    exchanges, etc.

crypt-rot13 (1.0.1)
    Character rotation encryption, i.e. Caesar Cipher

Crypt::ISAAC (0.9.1)
    Ruby implementation of the ISAAC PRNG
csinterface (0.6.2, 0.6.1)
    cs/Interface provides interface (like typing) support for Ruby
    classes and objects.

cstemplate (0.5.1, 0.4.1, 0.3.1, 0.1.2, 0.1.1)
    cs/Template is a fast, generic text templating engine for Ruby,
    written in C.

ctapi (0.2.2)
    Ruby extension for Chipcard Cardterminal-API (CTAPI)

ctype (0.2.0)
    ctype provides Ruby-style methods known from ctype.h.

cursor (0.9, 0.8, 0.6, 0.5)
    external iterator API

daapclient (0.1.0, 0.0.2)
    Net::DAAP::Client is an iTunes share client.

daedalus (2.0.1)
    A daemon for monitoring and reacting to various system and program
    conditions

daemons (0.4.2, 0.4.1, 0.4.0, 0.3.0, 0.2.1, 0.2.0, 0.0.1)
    A toolkit to create and control daemons in different ways

damagecontrol (0.5.0.1404, 0.5.0.1393, 0.5.0.1392, 0.5.0.1391, 0.5.0)
    DamageControl

darcs-ruby (0.0.1)
    Interface to Darcs change control system

dataview (0.3.1, 0.3.0, 0.2.0, 0.1.1, 0.1.0)
    Data View is a library that creates a view of a data model. The view
    can transform the data of the data model without changing the data.
    Supports ActiveRecord models and other data models that have a
    similar interface.


db_structure (1.0.2, 1.0.1, 1.0.0)
    [Rails] Database utilities.

dbc (2.0.0, 1.3.0, 1.2.3, 1.2.2, 1.2.1, 1.2.0, 1.1.2, 1.1.1, 1.1.0)
    Design by Contract (DBC) for C

dbdbd (0.2.2)
    dbdbd (David Black's Database Definer) -- for ad hoc flat-file
    database formats

dbi-dbrc (1.1.0, 1.0.1, 1.0.0)
    A simple way to avoid hard-coding passwords with DBI

dbmodel (0.1.0)
    A program that generates Rails files from a data model

dbus (0.1.10, 0.1.9, 0.1.8, 0.1.7, 0.1.5)
    Ruby bindings for D-BUS.

dctl (1.0.3, 1.0.2, 1.0.1, 1.0.0)
    dctl - a daemon controller written in Ruby

De.linque.nt (0.0.1)
    Twisted script for ad-hoc Del.icio.us meta-posts.

debugprint (1.0.0)
    Easy debug() and info() methods for Kernel that use $VERBOSE and
    $INFO

deplate (0.7.3)
    Convert wiki-like markup to latex, docbook, html, or html-slides

dev-utils (1.0.1, 1.0)
    Debugging utilities: breakpoints, debugging, and tracing.

diakonos (0.7.0)
    Diakonos is a customizable, usable console-based text editor.

diff-lcs (1.1.2, 1.1.1, 1.1.0.1, 1.1.0, 1.0.4.1, 1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0.0)
    Provides a list of changes that represent the difference between two
    sequenced collections.


digest-bubblebabble (1.1.0)
    A Ruby package for creating BubbleBabble fingerprints.

dnssd (0.6.0)
    DNS Service Discovery (aka Rendezvous) API for Ruby

ducktypechecker (0.1.1, 0.1.0)
    Check to see if an object "walks like a duck".

dynaload (0.2.0, 0.1.1, 0.1.0)
    dynaload

easyprompt (0.1.3, 0.1.2, 0.1.1, 0.1.0)
    EasyPrompt is a utility for command-line scripts.

ebay (0.5.2, 0.5.1)
    eBay4R is a Ruby wrapper for eBay's Web Services SOAP API. Emphasis
    is on ease of use and small footprint.

EliteJournal (1.9.492, 1.9.480, 1.9.403, 1.9.401, 1.9.400)
    Easy to install, multi-user blog software

englishext (0.1.0)
    EnglishExtensions contains a few convenience methods for String.

eteos-client (0.3.0, 0.2.0)
    Eteos Client for Rails allows cross-website authentication via the
    Eteos authentication service (www.eteos.com) in two lines of code
    for Rails applications. Even integrates with ActiveRecord user
    models simply and easily.

extensions (0.6.0, 0.5.0, 0.4.0)
    'extensions' is a set of extensions to Ruby's built-in classes.  It
    gathers common idioms, useful additions, and aliases, complete with
    unit testing and documentation, so they are suitable for production
    code.

extract-curves (0.1.1)
    GUI digitizer of a raster trace of the geometric curve corresponding
    to the characteristics of motion of a process.


extract_curves (0.0.1)
    GUI digitizer of a raster trace of the geometric curve corresponding
    to the characteristics of motion of a process.

extractsbmtags (0.1.0)
    Extract social bookmark service's tags from RSS

ezcrypto (0.2.1, 0.2, 0.1.1, 0.1)
    Simplified encryption library.

facade (1.0.1)
    An easy way to implement the facade pattern in your class

FaceToFace (0.1.0)
    Standardize object conversion and messaging, e.g. '5.to( String )'
    instead 'of 5.to_s'

facets (2005.10.30, 2005.10.15, 2005.10.11, 1.0.0, 0.7.2, 0.7.1, 0.7.0, 0.6.3)
    The proverbial Zoo-of-More for Ruby

facter (1.0.1)
    Facter collects Operating system facts.

FAM-Ruby (0.1.4)
    FAM (SGI's File Alteration Monitor) bindings for Ruby.

fastercsv (0.1.4, 0.1.3, 0.1.2)
    FasterCSV is CSV, but faster, smaller, and cleaner.

fcgi (0.8.6.1, 0.8.6, 0.8.5)
    FastCGI ruby binding.

fckeditor (0.1.0)
    A class for generating the HTML needed for the FCKEditor

feedreader (0.2.3)
    Example rails project for use with the FeedTools library.



feedtools (0.2.18, 0.2.17, 0.2.16, 0.2.15, 0.2.14, 0.2.13, 0.2.12, 0.2.11, 0.2.10, 0.2.9, 0.2.8, 0.2.7, 0.2.6, 0.2.5, 0.2.4, 0.2.3, 0.2.2, 0.2.1, 0.2.0, 0.1.0)
    Parsing, generation, and caching system for xml news feeds.

ferret (0.3.2, 0.3.1, 0.3.0, 0.2.2, 0.2.1, 0.2.0, 0.1.4, 0.1.3, 0.1.2, 0.1.1, 0.1.0)
    Ruby indexing library.

file-tail (0.1.3, 0.1.2)
    File::Tail for Ruby

filesystem (0.1.0)
    FileSystem is a test-obsessed library for mocking out the entire
    file system.

fingerserver (0.4.0)
    Exposes hash-style objects via the finger protocol.

fireruby (0.4.1, 0.4.0, 0.3.2, 0.3.1, 0.3.0, 0.2.2, 0.2.1, 0.2.0, 0.1.0)
    Ruby interface library for the Firebird database.

FixedPt (0.0.1)
    Fixed point class

fixrbconfig (1.2, 1.0)
    Fixes the rbconfig.rb that ships with Mac OS X 10.4 (Tiger), which
    makes it impossible to compile C extensions

flexmock (0.1.7, 0.1.6, 0.1.5, 0.1.4, 0.1.3, 0.1.2, 0.1.1, 0.0.3)
    Simple and Flexible Mock Objects for Testing

flickr (1.0.0)
    An insanely easy interface to the Flickr photo-sharing service. By
    Scott Raymond.

formvalidator (0.1.3)
    FormValidator is a Ruby port of Perl's Data::FormValidator library.

Freshmeat-Ruby (0.1.0)
    Freshmeat (http://freshmeat.net/) bindings for Ruby.

fxri (0.3.2, 0.3.1, 0.3.0, 0.2.0, 0.1.0)
    Graphical interface to the RI documentation, with search engine.

fxruby (1.4.3, 1.4.2, 1.4.1, 1.4.0, 1.2.6, 1.2.5, 1.2.4, 1.2.3, 1.2.2, 1.2.1)
    FXRuby is the Ruby binding to the FOX GUI toolkit.

gambit (0.1.1, 0.1.0)
    Gambit is a pure Ruby framework for building Web games.

gd2 (1.0)
    Ruby interface to gd 2 library.

gdiff (0.0.1)
    An implementation of the gdiff protocol

gen (0.27.0, 0.26.0, 0.25.0, 0.24.0)
    A simple code generation system.

genie (0.1)
    No summary: please specify a summary in metainfo/properties.rb

genx4r (0.05, 0.04)
    GenX4r is a Ruby wrapper around the GenX library, which allows you
    to programatically generate correct, cannonical XML output.

geoip (0.2.0, 0.1.0)
    GeoIP looks up a GeoIP database to provide geographical data for an
    IP address or Internet hostname. The free version of the GeoIP
    database available from www.maxmind.com only contains country
    information. This library supports that and the GeoIPCity file (both
    revisions). The data is much more reliable than using the country
    codes at the end of the hosts' domain names.

getopt (1.3.1, 1.3.0, 1.2.0, 1.1.0, 1.0.0)
    Getopt::Std for Ruby

getopt-declare (1.12, 1.09.7)
    Getopt-Declare is a command-line argument parser.


gettext (1.1.1, 1.1.0, 1.0.0)
    Ruby-GetText-Package is Native Language Support Library and Tools
    which modeled after GNU gettext package.

ggenv (0.5)
    Environment variable manipulation using ruby arrays.

glue (0.27.0, 0.26.0, 0.25.0, 0.24.0, 0.23.0, 0.22.0, 0.21.2, 0.21.0, 0.20.0, 0.19.0, 0.18.1, 0.18.0, 0.17.0, 0.16.0, 0.15.0, 0.14.0, 0.13.0)
    Utility methods and classes for Nitro.

gmailer (0.1.0, 0.0.9, 0.0.8, 0.0.7, 0.0.6, 0.0.5)
    An class interface of the Google's webmail service

gnuplot (2.2, 2.1, 2.0, 1.0)
    Utility library to aid in interacting with gnuplot

GongFox (0.2.3, 0.2.2, 0.2.1, 0.2.0, 0.1.0)
    GUI & alternative for 'net send'

grammar (0.5)
    BNF-like grammar specified directly in ruby

gruff (0.0.9, 0.0.8, 0.0.7, 0.0.6, 0.0.5, 0.0.4, 0.0.3, 0.0.2, 0.0.1)
    Beautiful graphs for one or multiple datasets.

hatenabm (0.1.2, 0.1.1, 0.1.0)
    Hatena Bookmark AtomAPI Binding for Ruby

hessian (0.5.0)
    A Ruby Hessian client.

highline (1.0.1, 1.0.0, 0.6.1, 0.6.0, 0.5.0, 0.4.0, 0.3.0, 0.2.0)
    HighLine is a high-level line oriented console interface.

hprevalence (0.2.0, 0.1.1, 0.1.0)
    Ruby based prevalence engine.

html-table (1.2.2)
    A Ruby interface for generating HTML tables

htmlclipping (0.1.5, 0.1.4, 0.1.3, 0.1.2, 0.1.1, 0.1.0)
    HtmlClipping generates excerpts from an HTML page that has a link
    pointing to a particular URI.

htmltokenizer (1.0)
    A class to tokenize HTML.

htmltools (1.09, 1.0.8)
    This is a Ruby library for building trees representing HTML
    structure.

icalendar (0.96.4, 0.96.3, 0.96.2, 0.96.1, 0.96, 0.95)
    A ruby implementation of the iCalendar specification (RFC-2445).

idn (0.0.1)
    LibIDN Ruby Bindings

ifmapper (0.9.7, 0.9.6, 0.9.5, 0.9, 0.8.5, 0.8.1, 0.8, 0.7, 0.6, 0.5)
    Interactive Fiction Mapping Tool.

ikko (0.1)
    A simple templating engine

Imlib2-Ruby (0.5.1, 0.4.3)
    Imlib2 bindings for Ruby.

instiki (0.10.2, 0.10.1, 0.10.0, 0.9.2)
    Easy to install WikiClone running on WEBrick and Madeleine

insurance (0.2, 0.1)
    Code coverage analysis package.

interface (1.0.0)
    Java style interfaces for ruby

io-reactor (0.05)
    An implementation of the Reactor design pattern for multiplexed
    asynchronous single-thread IO.

IO-Reactor (0.0.6)
    An implementation of the Reactor design pattern for multiplexed
    asynchronous single-thread IO.


iotaz (0.1.0)
    Object-relational mapping library.

ip (0.0.3, 0.0.2, 0.0.1)
    Ruby classes to work with IP address, ranges, and netmasks

ipadmin (0.1.0)
    A package for manipulating IPv4/IPv6 address space.

iphoto2 (1.0.1, 1.0.0)
    iphoto contains methods to parse and access the contents of the
    iPhoto pictures.

irb-history (1.0.0)
    Persistent, shared IRB Readline history

iterator (0.8, 0.6, 0.5)
    bidirectional external iterators

jabber4r (0.8.0, 0.7.0)
    Jabber4r is a pure-Ruby Jabber client library

jobserver (0.1.4)
    Jobserver serves to run programs on multiple machines in a network
    using ssh.

Joystick-Ruby (0.1.0)
    Linux joystick support for Ruby.

jpeg2pdf (0.12)
    jpeg2pdf is a free program that converts a directory of JPEG files
    to a PDF file.

json (0.4.0)
    A JSON implementation in Ruby

keyedlist (0.4.0)
    A Hash which automatically computes keys.

khammurabi (0.2)
    An inference engine.


KirbyBase (2.5.2, 2.5.1, 2.5)
    KirbyBase is a simple, pure-Ruby, plain-text, flat-file database
    management system.

kitchen (0.0.3)
    kitchen provides an easy way to destructively test your code.

kodekopelli (0.8.0)
    Making code generation rock since 2003. Do it well. Do it once. Let
    Kodekopelli do the rest.

kreed (0.0.2, 0.0.1)
    Kyle's Ruby Extendable Editor For Doom

kwaff (1.0.0)
    a friendly formatter to generate XHML

kwalify (0.5.1, 0.5.0, 0.3.0, 0.2.0, 0.1.0)
    a tiny schema validator for YAML document.

kwartz-ruby (2.0.4, 2.0.3, 2.0.2, 2.0.1, 2.0.0)
    a template system for Ruby, PHP, and Java

kwatable (0.0.1)
    SQL and DTO generator from table definition

ladspar (0.1)
    Interface to LADSPA plugins

lafcadio (0.9.1, 0.9.0, 0.8.2, 0.8.1, 0.8.0, 0.7.5, 0.7.4, 0.7.3, 0.7.2, 0.7.1, 0.7.0, 0.6.6, 0.6.5, 0.6.4, 0.6.3, 0.6.2, 0.6.1, 0.6.0, 0.5.2, 0.5.1, 0.5.0, 0.4.3, 0.4.2, 0.4.1, 0.4.0, 0.3.6, 0.3.5, 0.3.4)
    Lafcadio is an object-relational mapping layer

latex (0.1.3, 0.1.2, 0.1.1)
    Latex is a LaTeX text generation library for Ruby.

lazylist (0.2.2, 0.2.1, 0.2.0, 0.1.3, 0.1.2)
    Implementation of lazy lists for Ruby

libbz2 (0.4)
    Ruby-BZ2 is a Ruby extension to use libbz2.



libgnucap-ruby (0.1)
    gnucap-ruby is a ruby binding to gnucap

libinject (0.1.0)
    LibInject is a developer tool for injecting external dependencies
    into a Ruby file.

libxosd-ruby (0.4)
    libxosd-ruby is a ruby interface to libxosd

libxosd2-ruby (0.4)
    libxosd-ruby is a ruby interface to libxosd

Linguistics (1.0.3, 1.0.2)
    A generic, language-neutral framework for extending Ruby objects
    with linguistic methods.

localization_generator (1.0.8, 1.0.7, 1.0.6, 1.0.5, 1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0.0)
    [Rails] Localization generator.

lockfile (1.4.0, 1.3.0, 1.1.0)
    lockfile

log4r (1.0.5)
    Log4r is a comprehensive and flexible logging library for Ruby.

login_generator (1.1.0)
    [Rails] Login generator.

logmerge (1.0.0)
    Resolves IP addresses and merges Apache access logs.

lxl (0.4.3, 0.4.2, 0.4.1, 0.4.0, 0.3.8, 0.3.4, 0.3.1, 0.3.0, 0.2.4, 0.2.3, 0.2.2, 0.2.0, 0.1.1, 0.1.0)
    LXL (Like Excel) is a mini-language that mimics Microsoft Excel
    formulas. Easily extended with new constants and functions.

madeleine (0.7.1, 0.6.1, 0.6)
    Madeleine is a Ruby implementation of Object Prevalence

mailfactory (1.2.1, 1.0.2, 1.0.1, 1.0.0, 0.5.3, 0.5.2, 0.5.1, 0.5.0)
    MailFactory is a pure-ruby MIME mail generator

marc (0.0.8, 0.0.7, 0.0.6, 0.0.5, 0.0.4, 0.0.3, 0.0.2, 0.0.1)
    A ruby library for working with Machine Readable Cataloging

markaby (0.2)
    Markup as Ruby, write HTML in your native Ruby tongue

MB-Ruby (0.2.1, 0.1.0)
    MusicBrainz bindings for Ruby.

mechanize (0.3.1, 0.3.0, 0.2.3, 0.2.2, 0.2.1, 0.2.0, 0.1.3, 0.1.2, 0.1.1, 0.1.0)
    Automated web-browsing.

memcache-client (1.0.3)
    A Ruby memcached client

memoize (1.2.0, 1.1.0, 1.0.0)
    Speeds up methods at the cost of memory (or disk space)

merge3 (0.8)
    This gem demonstrates executable scripts

meta_project (0.4.13, 0.4.12, 0.4.11, 0.4.10, 0.4.9, 0.4.8, 0.4.7, 0.4.6, 0.4.5, 0.4.4, 0.4.3, 0.4.2, 0.4.1)
    Ruby library for interacting with project hosting servers, scms and
    issue trackers.

metaid (1.0)
    slight metaprogramming helpers

midilib (0.8.5, 0.8.4, 0.8.3, 0.8.2, 0.8.1, 0.8.0)
    MIDI file and event manipulation library

mime-types (1.13.1)
    Manages a MIME Content-Type that will return the Content-Type for a
    given filename.

mockery (0.4.1)
    Dynamic mock objects

mockfs (0.1.2, 0.1.1)
    MockFS is a test-obsessed library for mocking out the entire file
    system.

model_security_generator (0.0.9, 0.0.8, 0.0.7, 0.0.6, 0.0.5, 0.0.3, 0.0.2, 0.0.1)
    [Rails] Model security and authentication generator.

money (1.5.9, 1.5.8, 1.5.6, 1.5, 1.4, 1.3.2)
    Class aiding in the handling of Money.

month (0.1.0)
    Month is a utility class for representing months in Ruby.

multi (0.1)
    Multiple Dispatch/Pattern Matching for Ruby

multiblocks (0.1.0)
    multiblocks is a framework for emulating Smalltalk-like method calls
    which can take more than one block parameter

MultipartAlternativeLite (0.0.1)
    Lib for creating multipart/alternative HTML messages.

mw-template (0.9.1)
    MuraveyWeb::Template is a decent template library,  part of
    MuraveyWeb framework.

mysql (2.7, 2.6, 2.5.1)
    MySQL/Ruby provides the same functions for Ruby programs that the
    MySQL C API provides for C programs.

namecase (1.0.0)
    NameCase is a Ruby implementation of Lingua::EN::NameCase, a library
    for converting strings to be properly cased.

narf (0.7.3, 0.7.2, 0.7.1, 0.6.3, 0.6.2, 0.6.1, 0.5.1)
    NARF is a replacement for and derivative of the Ruby CGI library. It
    exists to trivialize web development .

ncurses (0.9.1)
    This wrapper provides access to the functions, macros, global
    variables and constants of the ncurses library.  These are mapped to
    a Ruby Module named "Ncurses":  Functions and external variables are
    implemented as singleton functions of the Module Ncurses.


needle (1.3.0, 1.2.1, 1.2.0, 1.1.0, 1.0.0, 0.9.0, 0.6.0, 0.5.0)
    Needle is a Dependency Injection/Inversion of Control container for
    Ruby. It supports both type-2 (setter) and type-3 (constructor)
    injection. It takes advantage of the dynamic nature of Ruby to
    provide a rich and flexible approach to injecting dependencies.

needle-extras (1.0.0)
    Needle-Extras is a collection of additional services that can be
    used with Needle. This is basically a test-bed of services that may
    eventually find their way into Needle itself.

neelix (0.0.3)
    Recipe management system

nemo (0.1.3, 0.1.2, 0.1.0)
    Ruby port of Mewa for Wee

net-netrc (0.2.0, 0.1.0)
    Net::Netrc provides ftp(1)-style .netrc parsing

net-ping (1.1.0, 1.0.1, 1.0.0)
    A ping interface for Ruby

net-sftp (1.1.0, 1.0.1, 1.0.0, 0.9.0, 0.5.0)
    Net::SFTP is a pure-Ruby implementation of the SFTP client protocol.

net-ssh (1.0.6, 1.0.5, 1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0.0, 0.9.0, 0.6.0, 0.5.0, 0.1.0, 0.0.5, 0.0.4, 0.0.3, 0.0.2, 0.0.1)
    Net::SSH is a pure-Ruby implementation of the SSH2 client protocol.

net-tftp (0.1.0)
    Net::TFTP is a pure Ruby implementation of the Trivial File Transfer
    Protocol (RFC 1350)

net-tnsping (1.1.0, 1.0.0)
    A package for pinging Oracle listeners and databases

neuro (0.4.0)
    Neural Network Extension for Ruby


nitro (0.27.0, 0.26.0, 0.25.0, 0.24.0, 0.23.0, 0.22.0, 0.21.2, 0.21.0, 0.20.0, 0.19.0, 0.18.1, 0.18.0, 0.17.0, 0.16.0, 0.15.0, 0.14.0, 0.13.0, 0.12.0, 0.11.0, 0.10.0, 0.9.5, 0.9.3, 0.8.0, 0.7.0, 0.6.0, 0.5.0, 0.4.1, 0.3.0, 0.2.0, 0.1.2)
    Everything you need to create Web 2.0 applications with Ruby and
    Javascript

nitro-auth (0.2.0)
    Provides configurable, extensible authentication and authorization
    for Nitro.

ObjectGraph (1.0.1, 1.0)
    A simple script that generates a graph of the ruby class
    hierarchies. Uses GraphViz (separate install).

og (0.27.0, 0.26.0, 0.25.0, 0.24.0, 0.23.0, 0.22.0, 0.21.2, 0.21.0, 0.20.0, 0.19.0, 0.18.1, 0.18.0, 0.17.0, 0.16.0, 0.15.0, 0.14.0, 0.13.0, 0.12.0, 0.11.0, 0.10.0, 0.9.5, 0.9.3, 0.8.0, 0.7.0, 0.6.0, 0.5.0)
    State of the art object-relational mapping system.

Ook (1.0.2)
    A Ruby interpreter for the Ook!
    (www.dangermouse.net/esoteric/ook.html) and BrainF*ck
    (www.catseye.mb.ca/esoteric/bf/index.html) programming languages.

openid (0.0.1)
    OpenID support for Ruby

opensearch (0.0.1)
    Search A9 OpenSearch compatible engines

OptionParser (0.5.1, 0.5.0)
    A flexible command line option parser.

Orbjson (0.0.4, 0.0.3, 0.0.2, 0.0.1)
    Lib for creating JSON-RPC server applications.

packrat (0.1.0)
    A package documentation extractor/generator for Copland.

PageTemplate (2.1.6, 2.1.5, 2.1.3, 2.1.2, 2.1.1, 2.1.0, 2.0.0, 1.2.0, 1.1.2, 1.1.1)
    A simple templating system for Web sites.


parseinput (0.0.1)
    Parse Input is a chain-saw tool for data mining.

ParseTree (1.3.7, 1.3.6, 1.3.5, 1.3.4, 1.3.3, 1.3.2, 1.3.0, 1.2.0, 1.1.1, 1.1.0)
    Extract and enumerate ruby parse trees.

pathname2 (1.4.0, 1.3.1, 1.3.0, 1.2.1, 1.2.0, 1.1.0, 1.0.0)
    An alternate implementation of the Pathname class

payment (1.0.1, 0.9)
    Payment is used to process credit cards and electronic cash through
    merchant accounts.

paymentonline (0.1)
    Ruby interface for the Payment Online Direct Connect API

paypal (1.0.1, 1.0.0, 0.9.0, 0.5.1, 0.5.0)
    Paypal IPN integration library for rails and other web applications

pdf-writer (1.1.3, 1.1.2, 1.1.1, 1.1.0, 1.0.1, 1.0.0)
    A pure Ruby PDF document creation library.

permutation (0.1.3, 0.1.2, 0.1.1)
    Permutation library in pure Ruby

pidify (0.1.1, 0.1.0)
    This allows a script to check if there is currently another running
    instance of itself, and give it the ability to kill that instance
    based on PID.

Pimki (1.8.092, 1.7.092, 1.6.092, 1.5.092, 1.4.092, 1.3.092, 1.2.092, 1.1.092, 1.0.092)
    A Personal Information Manager (PIM) based on Instiki's Wiki
    technology.

pippin (0.1)
    High level XML marshalling/unmarshalling framework.

Platform (0.4.0, 0.3.0, 0.2.0)
    Hopefully robust platform sensing

plist (1.0.0)
    plist parses Mac OS X plist files into ruby data types.

podcast (0.0.4, 0.0.3, 0.0.2)
    Create podcasts from MP3 files

posixlock (0.0.1)
    Methods to add posix (fcntl based and nfs safe) locking to the
    builtin File class

postgres (0.7.1)
    The extension library to access a PostgreSQL database from Ruby.

postgres-pr (0.4.0, 0.3.6, 0.3.5, 0.3.4, 0.3.3, 0.3.2, 0.3.1, 0.3.0, 0.2.2, 0.2.1, 0.2.0, 0.1.1, 0.1.0, 0.0.1)
    A pure Ruby interface to the PostgreSQL (>= 7.4) database

pqa (0.7, 0.6, 0.5)
    SQL query analyzer

precedence (0.8.0, 0.6.0)
    A library for the creation manipulation and analysis of precedence
    networks.

PrettyException (0.9.5, 0.9.3, 0.9.2, 0.9.1)
    PrettyException is a library to output pretty html output for raised
    exceptions.

PriorityQueue (0.1.2, 0.1.0)
    This is a fibonacci-heap priority-queue implementation

production_log_analyzer (1.3.0, 1.2.1, 1.2.0, 1.1.0)
    Extracts statistics from Rails production logs

progressbar (0.0.3)
    Ruby/ProgressBar is a text progress bar library for Ruby.  It can
    indicate progress with percentage, a progress bar, and estimated
    remaining time.

ptools (1.0.0)
    Extra methods for the File class

puppet (0.9.2)
    Puppet is a server configuration management tool.

purplepkg (0.0.6, 0.0.5, 0.0.4, 0.0.3)
    A simple pre-packaging tool with meta-package plugin support.

queuehash (0.1.0)
    A QueueHash is an ordered hash: Keys are ordered according to when
    they were inserted.

r43 (0.3.0, 0.2.0)
    A Ruby wrapper for the 43 Things web services API

ragi (1.0.1, 1.0.0)
    RAGI allows you to create useful telephony applications using
    Asterisk and Ruby [on Rails].

rail_stat_generator (0.1.3, 0.1.1, 0.1.0)
    RailStat is a real-time web site statistics package which uses Ruby
    on Rails web application framework.

rails (1.0.0, 0.14.4, 0.14.3, 0.14.2, 0.14.1, 0.13.1, 0.13.0, 0.12.1, 0.12.0, 0.11.1, 0.11.0, 0.10.1, 0.10.0, 0.9.5, 0.9.4.1, 0.9.4, 0.9.3, 0.9.2, 0.9.1, 0.9.0, 0.8.5, 0.8.0, 0.7.0, 0.6.5, 0.6.0)
    Web-application framework with template engine, control-flow layer,
    and ORM.

rails_analyzer_tools (1.1.0, 1.0.0)
    Tools for analyzing the performance of web sites.

rails_product (0.6, 0.5)
    Creates a ready-to-go productized Ruby on Rails application from a
    single command ('rails_product').

RailsEditor (0.0.21)
    A screen + vim IDE setup for editing a Rails tree

rake (0.7.0, 0.6.2, 0.6.0, 0.5.4, 0.5.3, 0.5.0, 0.4.15, 0.4.14, 0.4.13, 0.4.12, 0.4.11, 0.4.10, 0.4.9, 0.4.8, 0.4.7, 0.4.6, 0.4.4, 0.4.3, 0.4.2, 0.4.0, 0.3.2)
    Ruby based make-like utility.

rakepp (0.0.1)
    Cpp Support for Rake.

rami (0.4, 0.3, 0.2, 0.1)
    A proxy server/client api for the Asterisk Manager Interface

rant (0.5.4, 0.5.2, 0.5.0, 0.4.8, 0.4.6, 0.4.4, 0.4.2, 0.4.0, 0.3.8, 0.3.6, 0.3.4, 0.3.2, 0.3.0)
    Rant is a Ruby based build tool.

rb_cdio (0.2.0, 0.1.1, 0.1.0)
    Bindings for libcdio and libcddb: Cross-platform CD-ROM reading and
    control

rbeai (1.0.1, 0.0.1)
    Simple EAI Engine.

rbibtex (0.1.0, 0.0.2, 0.0.1)
    A bibtex parsing library written in pure ruby

rbot (0.9.9)
    A modular ruby IRC bot.

rbpm (0.0.3, 0.0.2, 0.0.1)
    lightweight (jbpm-like) workflow framework

rcss (0.3.1)
    Rcss - CSS Server-side Constants for Ruby/Rails

rdf (0.3)
    RubyRDF is a wrapper over the Redland RDF framework

rdf-redland (0.5.1.3, 0.5.1.2, 0.5.1, 0.5)
    rdf-redland is a wrapper over the Redland RDF framework

realrand (1.0.2)
    Generate real random numbers with Ruby.

reap (2005.10.17, 2005.10.10, 5.10.10, 4.0, 3.01, 0.6.1, 0.5.0, 0.4.0)
    Tools for Ruby project testing, management and assistance.

RedCloth (3.0.4, 3.0.3, 3.0.2, 3.0.1, 3.0.0, 2.0.11, 2.0.10, 2.0.9, 2.0.8, 2.0.7, 2.0.6, 2.0.5, 2.0.4, 2.0.3, 2.0.2)
    RedCloth is a module for using Textile and Markdown in Ruby. Textile
    and Markdown are text formats.  A very simple text format. Another
    stab at making readable text that can be converted to HTML.



refe (0.8.0.2, 0.8.0.1, 0.8.0.0)
    ReFe is yet another command line Ruby Reference Manual browser. It
    supports only Japanese.

reference (0.5)
    provides reference/pointer functionality of other languages

reg (0.4.6)
    The reg pattern matching/replacement language

regexp-engine (0.9, 0.8)
    regular expression engine

reliable-msg (1.1.0)
    Reliable messaging and persistent queues for building asynchronous
    applications in Ruby

revolution (0.5, 0.4, 0.3, 0.2, 0.1)
    Revolution is a binding for the Evolution email client

rfs (0.3, 0.2, 0.1)
    A utility that allows you to use regular expressions to rename large
    sets of files or folders. Fxruby and cmd-line interfaces.

rgl (0.2.3, 0.2.2)
    Ruby Graph Library

RGnuchess (0.1.0)
    An interface for working with gnuchess, providing some basic chess
    tools.

rhizmail (0.1.4, 0.1.3, 0.1.2, 0.1.1, 0.1.0)
    RhizMail is a test-friendly library for sending out customized
    emails.

ri18n (0.0.3, 0.0.2)
    Ruby application internationalization and localization library

ribit (0.3.0)
    Ribit - Wiki for Mobiles

rio (0.3.4, 0.3.3, 0.3.2, 0.3.1)
    Rio - Ruby I/O Comfort Class

ritex (0.1)
    WebTeX to MathML conversion library.

rlirc (0.3.1, 0.3, 0.2, 0.1)
    a replacement for irexec and irxevent from lirc

rmagick (1.9.3, 1.9.2, 1.9.1, 1.9.0, 1.8.3, 1.8.2, 1.8.1, 1.8.0, 1.7.4, 1.7.3, 1.7.2, 1.7.1)
    RMagick is an interface between the Ruby programming language and
    the ImageMagick and GraphicsMagick image processing libraries.

rmail (0.17)
    This is RubyMail, a lightweight mail library containing various
    utility classes and modules that allow Ruby scripts to parse,
    modify, and generate MIME mail messages.

rmarc (0.2.0, 0.1.1)
    RMARC is a library for working with MARC and MARC XML data in Ruby

Rodo (1.1)
    Rodo attempts to help user organizes his ToDo files.

rook (0.0.2, 0.0.1)
    a SCM tool like Make, Rake, Ant, and so on.

rools (0.1.4)
    A Rules Engine written in Ruby

ropenlaszlo (0.4.0, 0.3.0, 0.2.0)
    Ruby interface to OpenLaszlo.

rote (0.3.2.2, 0.3.2, 0.3.0.2, 0.3.0, 0.2.4.1, 0.2.4, 0.2.2, 0.2.0, 0.1.6)
    Adds template-based doc support to Rake.

rq (0.1.7)
    rq is an __experimental__ tool used to manage nfs mounted work
    queues

rrename (0.3.0, 0.2.0)
    A GNOME2 based tool for interactively renameing files  with regular
    expressions.


rrt_ruby (0.3.1, 0.3.0, 0.2.1)
    rrt_ruby is a Ruby library providing access to Rose RealTime models
    through RRTEI

rscm (0.4.0, 0.3.16, 0.3.15, 0.3.14, 0.3.13, 0.3.12, 0.3.11, 0.3.10, 0.3.9, 0.3.8, 0.3.7, 0.3.6, 0.3.5, 0.3.4, 0.3.3, 0.3.2, 0.3.1, 0.3.0, 0.2.1.1404, 0.2.0, 0.1.0.1338, 0.1.0.1337, 0.1.0.999, 0.1.0)
    RSCM - Ruby Source Control Management

rscm-accurev (0.0.7, 0.0.6, 0.0.4, 0.0.3, 0.0.2, 0.0.1, 0.0)
    RSCM::Accurev - RSCM API for Accurev

rsi (0.4)
    RSI (Ruby Simple Indexer) is a simple full text index

rspec (0.3.2, 0.3.1, 0.3.0, 0.2.0, 0.1.7, 0.1.6, 0.1.5, 0.1.4, 0.1.3, 0.1.2, 0.1.1, 0.1.0)
    Behaviour Specification Framework for Ruby

rstyx (0.2.0)
    RStyx is an implementation of the Styx/9P2000 distributed filesystem
    protocol for Ruby.

rsyncmanager (1.1)
    RsyncManager is a daemon for controlling and monitoring rsync
    transfers

rtaglib (0.1.1, 0.1.0)
    Bindings for taglib

rtf (0.1.0)
    Ruby library to create rich text format documents.

Rubilicious (0.1.5, 0.1.4, 0.1.2, 0.1.0)
    Delicious (http://del.icio.us/) bindings for Ruby.

rubinium (0.1.1)
    Code generator for Selenium with test validation

rublog (0.8.0)
    RubLog is a simple web log, based around the idea of displaying a
    set of regular files in a log-format.

ruby-activeldap (0.6.0, 0.5.9, 0.5.8, 0.5.7, 0.5.5, 0.5.4, 0.5.3, 0.5.2, 0.5.1, 0.5.0, 0.4.4, 0.4.3, 0.4.2, 0.4.1)
    Ruby/ActiveLDAP is a object-oriented API to LDAP

ruby-activeldap-debug (0.6.0, 0.5.9, 0.5.8, 0.5.7, 0.5.6, 0.5.5)
    Ruby/ActiveLDAP is a object-oriented API to LDAP

ruby-agi (1.1.0, 1.0.2)
    Ruby Language API for Asterisk

ruby-ajp (0.1.5)
    An implementation of Apache Jserv Protocol 1.3 in Ruby

ruby-breakpoint (0.5.0)
    ruby-breakpoint lets you inspect and modify state at run time.

ruby-cache (0.3.0)
    Ruby/Cache is a library for caching objects based on the LRU
    algorithm for Ruby.

ruby-contract (0.1.1)
    ruby-contract provides support for describing and using types via
    unit-tests.

ruby-doom (0.8)
    Ruby-DOOM provides a scripting API for creating DOOM maps. It also
    provides higher-level APIs to make map creation easier.

ruby-gdchart (1.0.0)
    A Ruby wrapper around Bruce Verderaime's GDChart chart-drawing
    utility. (Note: The C library that this gem wraps is included, but
    requires the installation of gd-2.0.28 or higher.)

ruby-growl (1.0.1, 1.0.0)
    Pure-Ruby Growl Notifier

ruby-json (1.1.1)
    ruby-json is a library for using the JavaScript Object Notation

    (JSON) under Ruby.

ruby-managesieve (0.2.0, 0.1.0)
    A Ruby library for the MANAGESIEVE protocol

Ruby-MemCache (0.0.1)
    This is a client library for memcached, a high-performance
    distributed memory cache.

ruby-mp3info (0.4)
    ruby-mp3info is a pure-ruby library that gives low level
    informations on mp3 files

ruby-postgres (0.7.1.2005.12.21, 0.7.1.2005.12.20, 0.7.1.2005.11.27, 0.7.1.2005.11.24)
    Ruby extension library providing an API to PostgreSQL

ruby-web (1.1.1)
    Web libraries for ruby

ruby_ex (0.3.0, 0.2.0, 0.1.2, 0.1.1)
    RubyEx contains general purpose Ruby extensions.

ruby_odeum (0.2.1)
    Ruby/Odeum is a simple full text reverse indexer that lets you index
    a set of files and then search through them very quickly.

rubyacl (1.0)
    Library for handling ACL's

rubyforge (0.0.1, 0.0.0)
    rubyforge

rubyful_soup (1.0.3, 1.0.2, 1.0.1)
    An HTML/XML parser that handles bad markup and provides tree
    traversal methods.

rubygems-update (0.8.11, 0.8.10, 0.8.8, 0.8.6, 0.8.5, 0.8.4, 0.8.3, 0.8.1, 0.8.0)
    RubyGems Update GEM


RubyInline (3.4.0, 3.3.2, 3.3.1, 3.3.0, 3.2.1, 3.2.0, 3.1.0)
    Multi-language extension coding within ruby.

RubyJDWP (0.0.1)
    Ruby implementation of the Java Debug Wire Protocol. This version is
    pre-alpha.

rubylexer (0.6.2)
    lexer of ruby in ruby

rubypants (0.2.0)
    RubyPants is a Ruby port of the smart-quotes library SmartyPants.

rubyscript2exe (0.4.0, 0.3.6, 0.3.5, 0.3.4, 0.3.3)
    A Ruby Compiler

rubySelenium (0.0.8)
    rubySelenium is a wrapper around Selenium that generates the
    FitRunner style HTML on the fly so you can write selenium scripts
    programmatically.

rubyslippers (1.03, 1.02, 1.01, 1.00, 0.99, 0.98, 0.97, 0.96, 0.95, 0.94, 0.93, 0.92)
    RubySlippers is a GUI wrapper for RubyGems using RubyWebDialogs.

rubystats (0.1.1, 0.1.0)
    Classes for statistical calculations, e.g., binomial, beta, and
    normal distributions with PDF, CDF and inverse CDF (all ported from
    PHPMath) as well as Fisher's Exact Test

RubyToC (1.0.0.4)
    Ruby (subset) to C translator.

rubytree (0.2.2)
    Ruby implementation of the Tree data structure.

rubywebdialogs (0.2.0)
    The Web Browser as a Graphical User Interface for Ruby Applications

rubyzip (0.5.12, 0.5.11, 0.5.9, 0.5.8, 0.5.7, 0.5.5)
    rubyzip is a ruby module for reading and writing zip files

RuCodeGen (0.1.0)
    Simple code generation tool

runt (0.3.0, 0.2.0)
    Ruby Temporal Expressions.

ruport (0.2.9, 0.2.5, 0.2.4, 0.2.2, 0.2.0, 0.1.0)
    A generalized Ruby report generation and templating engine.

rutils (0.1.4, 0.1.3, 0.1.2, 0.1.1, 0.1.0, 0.0.4, 0.0.3)
    Simple processing of russian strings

ruvi (0.4.12, 0.4.11, 0.4.10, 0.4.9, 0.4.8, 0.4.7)
    Pure Ruby Vim-wannabe

ruwiki (0.9.3, 0.9.2, 0.9.1, 0.9.0)
    A simple, extensible, and fast Wiki-clone.

rvsh (0.4.5)
    VIM clone

rwb (0.2.1)
    Ruby Web Bench, a web performance and load testing framework

rwdaddresses (1.03, 1.02, 1.01, 0.99, 0.98, 0.97, 0.95, 0.94, 0.93, 0.92, 0.91, 0.9, 0.8)
    rwdaddresses is contact book application using rwdtinker and
    RubyWebDialogs.

rwddemo (0.92, 0.91, 0.90, 0.8, 0.7, 0.6)
    rwddemo application shows rwdtinker and RubyWebDialogs features.

rwdgutenberg (0.07, 0.06, 0.05, 0.04, 0.03)
    rwdgutenberg application is a text file reader for RubyWebDialogs.

rwdhypernote (0.10, 0.09, 0.08, 0.07, 0.06, 0.05, 0.04, 0.03)
    rwdhypernote application is a hierarchical note taker for
    RubyWebDialogs.


rwdmovies (0.95, 0.94, 0.93, 0.92, 0.91, 0.90, 0.7, 0.6)
    rwdmovies application is a movie database using RubyWebDialogs.

rwdschedule (1.02, 1.01, 1.00, 0.99, 0.98, 0.97, 0.96, 0.95, 0.94, 0.93, 0.92, 0.91, 0.9, 0.8, 0.6, 0.5)
    rwdschedule is an calendar application using rwdtinker and
    RubyWebDialogs.

rwdshell (1.00, 0.99, 0.98, 0.97, 0.96, 0.95, 0.94, 0.93, 0.92, 0.9)
    rwdshell is a GUI front end for operating system commands with
    rwdtinker and RubyWebDialogs features.

rwdtinker (1.67, 1.66, 1.65, 1.64, 1.63, 1.62, 1.61, 1.60, 1.59, 1.58, 1.57, 1.56, 1.55, 1.54, 1.53, 1.52, 1.51, 1.48, 1.47, 1.46, 1.45, 1.44, 1.43, 1.42, 1.41, 1.24, 1.23, 1.4, 1.3, 1.2)
    rwdtinker application is a framework to program for RubyWebDialogs.

rwdtorrent (0.04, 0.03, 0.02, 0.01)
    rwdtorrent is a GUI front end for BitTorrent with rwdtinker and
    RubyWebDialogs features.

rwdziparubyslippers (0.99)
    rubyslippers is frontend for the RubyGems system using rwdtinker and
    RubyWebDialogs. Requires rwdtinker >1.51

rwdziprwdanimatedgifs (0.70)
    rwdziprwdanimatedgifs is a animated gifs viewer using rwdtinker and
    RubyWebDialogs. Requires rwdtinker >1.51

rwdziprwdaschedule (1.02, 1.00, 0.97, 0.93)
    rwdziprwdwschedule is a event schedule application using rwdtinker
    and RubyWebDialogs. Requires rwdtinker >1.51

rwdziprwdmp3 (0.02)
    rwdziprwdmp3 is a Mp3 Player Control application using rwdtinker and
    RubyWebDialogs. Requires rwdtinker >1.51

rwdziprwdwaddresses (1.04, 1.00, 0.99, 0.97)
    rwdaddresses is a Contact Book using rwdtinker and RubyWebDialogs.
    Requires rwdtinker >1.56

rwdziprwdwcalc (0.50)
    rwdcalc is calculator using rwdtinker and RubyWebDialogs.


rwdziprwdwgutenberg (0.03)
    rwdgutenberg application is a text file reader for RubyWebDialogs.

rwdziprwdwhypernote (0.07, 0.04)
    rwdziprwdwhypernote is a hierarchical note editor using rwdtinker
    and RubyWebDialogs. Requires rwdtinker >1.51

rwdziprwdwmovies (0.90)
    rwdziprwdwmovies is a DVD and Video database application using
    rwdtinker and RubyWebDialogs. Requires rwdtinker >1.51

rwdziprwdwrefreshacpi (0.5)
    rwdziprwdwrefreshacpi is a Linux log reading application using
    rwdtinker and RubyWebDialogs. Requires rwdtinker >1.51

rwdziprwdwshell (0.96, 0.95)
    rwdziprwdaschedule is a event schedule application using rwdtinker
    and RubyWebDialogs. Requires rwdtinker >1.51

rwdziprwdwwords (0.02)
    rwdwords is a Dictonary lookup tool using rwdtinker and
    RubyWebDialogs. Requires rwdtinker >1.56

salted_login_generator (1.1.1, 1.1.0, 1.0.9, 1.0.8, 1.0.7, 1.0.6, 1.0.5, 1.0.4, 1.0.3, 1.0.2, 1.0.1)
    [Rails] Login generator with salted passwords.

schema_generator (1.0.2, 1.0.1, 1.0.0, 0.9.0, 0.2.0, 0.1.0)
    The rails schema generator generates complete SQL schemas from a
    collection of rails migrations.  It currently produces one schema
    file each for MySQL, PostgreSQL, and SQLite.

Schmock (0.9)
    Simple mock objects

Scratch (1.1, 1.0)
    Excessively minimalist weblog.

sds (0.3, 0.2)
    SDS is a database access and O/R mapping library

search_generator (0.5.1, 0.5, 0.4)
    [Rails] Search generator.

selenium (0.2.468)
    Selenium is a test tool for web applications. Note that this is an
    unofficial build of Selenium based on changeset 468 from the
    Selenium subversion repository.

sentry (0.3.1, 0.3, 0.2.9, 0.2.8)
    Sentry provides painless encryption services with a wrapper around
    some OpenSSL classes

session (2.4.0, 2.1.9)
    session

shipping (1.3.0, 1.2.1, 1.2.0, 1.1.0, 1.0.0)
    A general shipping module to find out the shipping prices via UPS or
    FedEx.

shorturl (0.8.2, 0.8.1, 0.8.0, 0.7.0, 0.6.0, 0.5.0, 0.4.0, 0.3.0, 0.2.1, 0.2.0, 0.1.0, 0.0.1)
    Shortens URLs using services such as TinyURL and RubyURL

silhouette (1.0.0)
    A 2 stage profiler

simple-rss (1.0.0)
    A simple, flexible, extensible, and liberal RSS and Atom reader for
    Ruby. It is designed to be backwards compatible with the standard
    RSS parser, but will never do RSS generation.

SimpleSearch (0.5.0)
    SimpleSearch is a simple vector space text search engine.

SimpleTrace (0.0.1)
    This module implements a simple tracing/logging scheme

site_generator (0.6, 0.5)
    Generates a Rails site in conjunction with the rails_product gem.

smagacor (0.0.1)
    A collection of small games in ruby


snmp (0.6.0, 0.5.1, 0.5.0, 0.4.1, 0.4.0, 0.3.0, 0.2.0, 0.1.0)
    A Ruby implementation of SNMP (the Simple Network Management
    Protocol).

Soks (1.0.3, 1.0.2, 1.0.1, 1.0.0, 0.0.7, 0.0.6, 0.0.5, 0.0.4, 0.0.3, 0.0.2)
    Yet another wiki.

sparklines (0.2.6, 0.2.5, 0.2.4, 0.2.3, 0.2.2, 0.2.1)
    Tiny graphs for concise data.

sparklines_generator (0.2.2, 0.2.1)
    Sparklines generator makes a Rails controller and helper for making
    small graphs in your web pages. See examples at
    http://nubyonrails.topfunky.com

sql_dep_graph (1.0.0)
    Graphs table dependencies based on usage from SQL logs

SQLDependencyGrapher (1.0.0)
    Graphs table dependencies based on usage from SQL logs

sqliki (0.0.4, 0.0.3)
    [Rails] SQL-based wiki generator.

sqliki_generator (0.0.4, 0.0.2, 0.0.1)
    [Rails] SQL-based wiki generator.

sqlite (2.0.1, 2.0.0, 1.3.1, 1.3.0, 1.2.9.1, 1.2.0, 1.1.3, 1.1.2, 1.1.1, 1.1)
    SQLite/Ruby is a module to allow Ruby scripts to interface with a
    SQLite database. VERSIONS >=2.0.0 ARE BETA RELEASES. THEY ARE
    INTENDED FOR TESTING ONLY, AND SHOULD NOT BE CONSIDERED
    PRODUCTION-WORTHY YET.

sqlite-ruby (2.2.3, 2.2.2, 2.2.1, 2.2.0, 2.1.0, 2.0.3, 2.0.2)
    SQLite/Ruby is a module to allow Ruby scripts to interface with a
    SQLite database.

sqlite3-ruby (1.1.0, 1.0.1, 1.0.0, 0.9.0, 0.6.0, 0.5.0)
    SQLite3/Ruby is a module to allow Ruby scripts to interface with a
    SQLite database.



sstruct (1.0.1)
    SuperStruct class: Best of Struct, OpenStruct, Array, Hash, etc.

staticweb (0.2.0)
    Staticweb is a command line static webpage generation tool

statistics (2001.2.28)
    module Math::Statistics provides common statistical functions

stemmer (1.0.1, 1.0.0)
    Word stemming algorithm(s)

stemmer4r (0.6, 0.5, 0.4, 0.3, 0.2, 0.1)
    Stemmer4r is a Ruby extension that wraps the snowball stemmer
    library (libstemmer).

stomp (1.0.1, 1.0.0)
    Ruby client for the Stomp messaging protocol

stream (0.5)
    Stream - Extended External Iterators

substitution_solver (0.5.1, 0.5.0)
    Program for solving mono-alphabetic simple substitution ciphers, (as
    in cryptoquotes), without word lengths.

SwedishTV (0.0.3, 0.0.2)
    Shows Swedish TV channel schedules in web browser.

sweph4ruby (0.0.1)
    An astrology library

swin (2004.03.14)
    Swin is a Ruby native extension that interfaces to the Win32
    graphics API

switchtower (0.10.0, 0.9.0)
    SwitchTower is a framework and utility for executing commands in
    parallel     on multiple remote machines, via SSH. The primary goal
    is to simplify and     automate the deployment of web applications.


sws (0.3, 0.2.1)
    SWS is a sophisticated web development library in spirit of Apple
    WebObjects

Syndic8-Ruby (0.2.0)
    Syndic8 (http://www.syndic8.com/) bindings for Ruby.

syndication (0.5.0, 0.4.0)
    A web syndication parser for Atom and RSS with a uniform API

syntax (1.0.0, 0.7.0, 0.5.0)
    Syntax is Ruby library for performing simple syntax highlighting.

syntaxi (0.5.0)
    Syntaxi formats code blocks in text (line number, line wrap, syntax
    color)

table (0.1.1)
    Rails Table Generator

table_generator (0.1.2, 0.1.1)
    Rails Table Generator

tagtools (0.0.3, 0.0.2, 0.0.1)
    Folksonomy system for Rails.

tar2rubyscript (0.4.7, 0.4.6, 0.4.5)
    A Tool for Distributing Ruby Applications

Technorati-Ruby (0.1.0)
    Technorati(http://technorati.com/) bindings for Ruby.

TeleAuth (0.5)
    Ruby library for the TeleAuth authentication system. Requires a
    TeleAuth API key.

term-ansicolor (1.0.2, 1.0.1, 1.0.0, 0.0.4)
    Ruby library that colors strings using ANSI escape sequences

termios (0.9.4)
    Termios module are simple wrapper for termios(3). It can be included
                                                                                                          into IO-family classes and can extend IO-family objects. In
    addition, the methods can use as module function.

test-unit-mock (0.30)
    Test::Unit::Mock is a class for conveniently building mock objects
    in Test::Unit test cases.

testunitxml (0.1.3)
    Unit test suite for XML documents

tex-hyphen (0.5.0, 0.4.0)
    Hyphenates a word according to a TeX pattern file.

text-format (1.0.0)
    Text::Format formats fixed-width text nicely.

text-highlight (1.0.2)
    A Ruby module for highlighting text, using ANSI escape sequences or
    HTML.

text-hyphen (1.0.0)
    Multilingual word hyphenation according to modified TeX hyphenation
    pattern files.

text-reform (0.2.0)
    Text::Reform reformats text according to formatting pictures.

textamerica (0.1)
    A Ruby API for interacting with TextAmerica.com

theme_generator (1.3.0, 1.2.2, 1.2.1, 1.2.0, 1.1.1, 1.1.0)
    [Rails] Theme generator adds support for themes into Rails
    applications

tidy (1.1.2, 1.1.1, 1.1.0, 1.0.1, 1.0.0)
    Ruby interface to HTML Tidy Library Project

tkregreplace (0.1.1, 0.1.0)
    TK program which visualizes and caries out regular expression
    matches and or replacements on text files

traits (0.9.0, 0.8.1, 0.8.0)
    traits

transaction-simple (1.3.0, 1.2.0)
    Simple object transaction support for Ruby.

tree (0.2.1)
    Ruby implementation of the Tree data structure.

trestle_generator (1.0.1, 1.0.0)
    [Rails] A drop-in replacement for the scaffold generator that
    produces production-ready controllers that are safe from
    state-changing HTTP GET requests and that have streamlined URLs.

trie (0.0.1)
    Implemention of a trie data structure

trimurti (0.1)
    Applications that assemble themselves, plugins

tRuTag (0.5.0)
    A tag aggregator (taggregator) for personal or web use.

tsql_shparser (0.0.1)
    tsql_shparser is a Shallow Parser for t-SQL (which is the procedural
    language for  MS SQL Server 2000).

ttk (0.2.1, 0.2.0, 0.1.580, 0.1.579, 0.1.576)
    TTK is an extensible framework for dynamic testing.

turing (0.0.9)
    Another implementation of captcha (http://captcha.net/)

tzinfo (0.1.1, 0.1.0, 0.0.4, 0.0.3, 0.0.2, 0.0.1)
    Daylight-savings aware timezone library

uformatparser (1.0.1, 1.0.0)
    Microformat parser for extracting microcontent from (X)HTML

unicode (0.1)
    Unicode normalization library.

units (1.0.1, 1.0.0)
    A general way to add units and conversion ability to numbers in
    Ruby.

urirequire (0.1.0)
    urirequire hijacks Kernel.require to download and eval Ruby code
    somewhere else on the internets.

usage (0.0.4, 0.0.3)
    This module implements a simple no thought command line option
    parser

Usage (0.0.2, 0.0.1)
    This module implements a simple no thought command line option
    parser

uscommerce (0.1.0)
    UsCommerce contains a few handy methods for handling business
    functions specific to the United States.

use (1.1.0, 1.0.0)
    Selectively mixin methods from a given module

uuid (1.0.0)
    UUID generator

uuidtools (0.1.4, 0.1.3, 0.1.2, 0.1.1, 0.1.0)
    Generation of UUIDs.

vcs (0.4.1, 0.4.0, 0.3.0, 0.2.148, 0.1)
    A wrapper over Version Control Systems

vim-ruby (2005.10.07, 2005.10.05, 2005.09.15, 2004.09.20)
    Ruby configuration files for Vim.  Run 'vim-ruby-install.rb' to
    complete installation.


VRTools (0.0.1)
    This module implements extensions to the VRuby/Swin libraries

vruby (2004.08.07)
    VRuby is a set of vr* series of ruby scripts which wrap swin.

w3mrefe (1.0.0)
    an interface to the on-line ruby reference manuals by w3m and refe.

watir (1.4.1)
    Automated testing tool for web applications.

webgen (0.3.8, 0.3.6, 0.3.5, 0.3.4, 0.3.3, 0.3.2, 0.3.1, 0.3.0, 0.2.0, 0.1.0)
    Webgen is a templated based static website generator.

webrick-webdav (1.0)
    WebDAV handler for WEBrick, Ruby's HTTP toolkit.

wee (0.10.0, 0.9.1, 0.9.0, 0.8.0, 0.7.0, 0.6.0, 0.5.0, 0.4.0, 0.3.1, 0.1.0)
    Wee is a framework for building highly dynamic web applications.

weft-qda (0.9.8, 0.9.6)
    GUI Qualitative Data Analysis Tool.

wet-winobj (0.1)
    Ruby library for Win32 objects

Wiki2Go (1.17.1, 1.17.0, 1.16.1, 1.16.0, 1.15.1, 1.15.0, 1.14.4, 1.14.3, 1.14.1, 1.14.0)
    Wiki2Go is a Ruby Wiki

win32-sapi (0.1.3, 0.1.2)
    An interface to the MS SAPI (Sound API) library.

wxrubylayouts (0.0.3, 0.0.2, 0.0.1)
    wxrubylayouts is a library of layout managers for wxRuby

x10-cm17a (1.0.1, 1.0.0, 0.9.0)
    Ruby based X10 CM17A Firecracker Controller

xampl (0.1.0)
    xampl

xampl-generator (0.1.0)
    xampl code generator

XDCC-Fetch (1.409, 1.386)
    XDCC-Fetch, written entirely in Ruby, is an intuitive, no-nonsense
    tool for searching, collecting and downloading XDCC  announcements
    within IRC  channels. XDCC-Fetch is released under the BSD license
    and available for free.

xforge (0.4.0, 0.3.5, 0.3.4, 0.3.3, 0.3.2, 0.3.1, 0.2.1, 0.2.0, 0.1.9, 0.1.8, 0.1.7, 0.1.6, 0.1.5, 0.1.4, 0.1.3, 0.1.2, 0.1.1, 0.1)
    Ruby based make-like utility.

xhtmldiff (1.0.0)
    XHTMLDiff is a tool and library for taking valid XHTML documents as
    input, and generating redlined valid XHTML text highlighting the
    changes between them as output.

xiacc (0.1)
    A Compiler-Compiler

xml-mapping (0.8.1, 0.8)
    An easy to use, extensible library for mapping Ruby objects to XML
    and back. Includes an XPath interpreter.

xml-simple (1.0.7)
    A very simple API for XML processing.

xmlelements (0.1.2, 0.1.1)
    Strange Xml-Api.

xmlresume2x (0.2.1, 0.2.0)
    Converts an xml resume to various output formats

xmltv2html (0.5.5, 0.5.4, 0.5.3)
    xmltv2html generates a HTML page from the output of XMLTV.

XMMS-Ruby (0.1.2)
    XMMS bindings for Ruby.

yax (0.1)
    YAX: Yet Another eXpect (chock-full of Ruby goodness)

yip (0.8.2)
    Adds interpolation to YAML; primarily for use in configuration files

ZenHacks (1.0.1, 1.0.0)
    Tools and toys of mine that don't have a better home.

To install rails


gem install rails

How to get a collection?

2006-01-20T18:55:00.000-08:00

The following code will get a collection from the database.

def edit
                @site = Site.find(@params["id"])
                @tags = Tag.find_all
        end

Cannot instantiate constant

2006-01-19T22:41:00.000-08:00

If you get this error then most likely the reason is that you don't have the model class created.

Create it with a command like:
ruby script/generate model Site

The single-table inheritance mechanism failed to locate the subclass

2006-01-19T22:19:00.000-08:00

Today I was working on creating my first Ruby on Rails application when I ran into this error:

The single-table inheritance mechanism failed to locate the subclass:
'Community Blog'. This error is raised because the column 'type' is reserved for storing the class in case of inheritance. Please rename this column if you didn't intend it to be used for storing the inheritance class or overwrite Site.inheritance_column to use another column for that information.

Apparently the reason for the error is specified within the error. The error is being caused because one of my columns in the table was named type. Now I had two options, either to rename the column or to "overwrite Site.inheritance_column to use another column for that information"

You can guess what I did. That's right, I simply renamed my column.

Frank