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-rw-r--r--railties/doc/guides/html/creating_plugins.html398
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diff --git a/railties/doc/guides/html/creating_plugins.html b/railties/doc/guides/html/creating_plugins.html
index 48d5f03687..97e14965a5 100644
--- a/railties/doc/guides/html/creating_plugins.html
+++ b/railties/doc/guides/html/creating_plugins.html
@@ -204,10 +204,12 @@ ul#navMain {
<li><a href="#_create_the_basic_app">Create the basic app</a></li>
- <li><a href="#_create_the_plugin">Create the plugin</a></li>
+ <li><a href="#_generate_the_plugin_skeleton">Generate the plugin skeleton</a></li>
<li><a href="#_setup_the_plugin_for_testing">Setup the plugin for testing</a></li>
+ <li><a href="#_run_the_plugin_tests">Run the plugin tests</a></li>
+
</ul>
</li>
<li>
@@ -265,123 +267,107 @@ ul#navMain {
<h1>The Basics of Creating Rails Plugins</h1>
<div id="preamble">
<div class="sectionbody">
-<div class="para"><p>Pretend for a moment that you are an avid bird watcher. Your favorite bird is the Yaffle, and you want to create a plugin that allows other developers to share in the Yaffle goodness.</p></div>
-<div class="para"><p>In this tutorial you will learn how to create a plugin that includes:</p></div>
+<div class="para"><p>A Rails plugin is either an extension or a modification of the core framework. Plugins provide:</p></div>
<div class="ilist"><ul>
<li>
<p>
-Core Extensions - extending String with a <tt>to_squawk</tt> method:
+a way for developers to share bleeding-edge ideas without hurting the stable code base
</p>
-<div class="listingblock">
-<div class="content"><!-- Generator: GNU source-highlight 2.9
-by Lorenzo Bettini
-http://www.lorenzobettini.it
-http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># Anywhere</span></span>
-<span style="color: #FF0000">"hello!"</span><span style="color: #990000">.</span>to_squawk <span style="font-style: italic"><span style="color: #9A1900"># =&gt; "squawk! hello!"</span></span>
-</tt></pre></div></div>
</li>
<li>
<p>
-An <tt>acts_as_yaffle</tt> method for ActiveRecord models that adds a <tt>squawk</tt> method:
+a segmented architecture so that units of code can be fixed or updated on their own release schedule
</p>
-<div class="listingblock">
-<div class="content"><!-- Generator: GNU source-highlight 2.9
-by Lorenzo Bettini
-http://www.lorenzobettini.it
-http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-weight: bold"><span style="color: #0000FF">class</span></span> Hickwall <span style="color: #990000">&lt;</span> ActiveRecord<span style="color: #990000">::</span>Base
- acts_as_yaffle <span style="color: #990000">:</span>yaffle_text_field <span style="color: #990000">=&gt;</span> <span style="color: #990000">:</span>last_sang_at
-<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
-
-Hickwall<span style="color: #990000">.</span>new<span style="color: #990000">.</span>squawk<span style="color: #990000">(</span><span style="color: #FF0000">"Hello World"</span><span style="color: #990000">)</span>
-</tt></pre></div></div>
</li>
<li>
<p>
-A view helper that will print out squawking info:
+an outlet for the core developers so that they don’t have to include every cool new feature under the sun
</p>
-<div class="listingblock">
-<div class="content"><!-- Generator: GNU source-highlight 2.9
-by Lorenzo Bettini
-http://www.lorenzobettini.it
-http://www.gnu.org/software/src-highlite -->
-<pre><tt>squawk_info_for<span style="color: #990000">(</span><span style="color: #009900">@hickwall</span><span style="color: #990000">)</span>
-</tt></pre></div></div>
</li>
+</ul></div>
+<div class="para"><p>After reading this guide you should be familiar with:</p></div>
+<div class="ilist"><ul>
<li>
<p>
-A generator that creates a migration to add squawk columns to a model:
+Creating a plugin from scratch
</p>
-<div class="listingblock">
-<div class="content">
-<pre><tt>script/generate yaffle hickwall</tt></pre>
-</div></div>
</li>
<li>
<p>
-A custom generator command:
+Writing and running tests for the plugin
</p>
-<div class="listingblock">
-<div class="content"><!-- Generator: GNU source-highlight 2.9
-by Lorenzo Bettini
-http://www.lorenzobettini.it
-http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-weight: bold"><span style="color: #0000FF">class</span></span> YaffleGenerator <span style="color: #990000">&lt;</span> Rails<span style="color: #990000">::</span>Generator<span style="color: #990000">::</span>NamedBase
- <span style="font-weight: bold"><span style="color: #0000FF">def</span></span> manifest
- m<span style="color: #990000">.</span>yaffle_definition
- <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
-<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
-</tt></pre></div></div>
</li>
<li>
<p>
-A custom route method:
+Storing models, views, controllers, helpers and even other plugins in your plugins
+</p>
+</li>
+<li>
+<p>
+Writing generators
+</p>
+</li>
+<li>
+<p>
+Writing custom Rake tasks in your plugin
+</p>
+</li>
+<li>
+<p>
+Generating RDoc documentation for your plugin
+</p>
+</li>
+<li>
+<p>
+Avoiding common pitfalls with <em>init.rb</em>
</p>
-<div class="listingblock">
-<div class="content"><!-- Generator: GNU source-highlight 2.9
-by Lorenzo Bettini
-http://www.lorenzobettini.it
-http://www.gnu.org/software/src-highlite -->
-<pre><tt>ActionController<span style="color: #990000">::</span>Routing<span style="color: #990000">::</span>Routes<span style="color: #990000">.</span>draw <span style="font-weight: bold"><span style="color: #0000FF">do</span></span> <span style="color: #990000">|</span>map<span style="color: #990000">|</span>
- map<span style="color: #990000">.</span>yaffles
-<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
-</tt></pre></div></div>
</li>
</ul></div>
-<div class="para"><p>In addition you'll learn how to:</p></div>
+<div class="para"><p>This guide describes how to build a test-driven plugin that will:</p></div>
<div class="ilist"><ul>
<li>
<p>
-test your plugins.
+Extend core ruby classes like Hash and String
</p>
</li>
<li>
<p>
-work with <em>init.rb</em>, how to store model, views, controllers, helpers and even other plugins in your plugins.
+Add methods to ActiveRecord::Base in the tradition of the <em>acts_as</em> plugins
</p>
</li>
<li>
<p>
-create documentation for your plugin.
+Add a view helper that can be used in erb templates
</p>
</li>
<li>
<p>
-write custom Rake tasks in your plugin.
+Add a new generator that will generate a migration
+</p>
+</li>
+<li>
+<p>
+Add a custom generator command
+</p>
+</li>
+<li>
+<p>
+A custom route method that can be used in routes.rb
</p>
</li>
</ul></div>
+<div class="para"><p>For the purpose of this guide pretend for a moment that you are an avid bird watcher. Your favorite bird is the Yaffle, and you want to create a plugin that allows other developers to share in the Yaffle goodness. First, you need to get setup for development.</p></div>
</div>
</div>
<h2 id="_preparation">1. Preparation</h2>
<div class="sectionbody">
<h3 id="_create_the_basic_app">1.1. Create the basic app</h3>
-<div class="para"><p>In this tutorial we will create a basic rails application with 1 resource: bird. Start out by building the basic rails app:</p></div>
+<div class="para"><p>The examples in this guide require that you have a working rails application. To create a simple rails app execute:</p></div>
<div class="listingblock">
<div class="content">
-<pre><tt>rails plugin_demo
-cd plugin_demo
+<pre><tt>gem install rails
+rails yaffle_guide
+cd yaffle_guide
script/generate scaffold bird name:string
rake db:migrate
script/server</tt></pre>
@@ -392,22 +378,24 @@ script/server</tt></pre>
<td class="icon">
<img src="./images/icons/note.png" alt="Note" />
</td>
-<td class="content">The aforementioned instructions will work for sqlite3. For more detailed instructions on how to create a rails app for other databases see the API docs.</td>
+<td class="content">
+<div class="title">Editor's note:</div>The aforementioned instructions will work for sqlite3. For more detailed instructions on how to create a rails app for other databases see the API docs.</td>
</tr></table>
</div>
-<h3 id="_create_the_plugin">1.2. Create the plugin</h3>
-<div class="para"><p>The built-in Rails plugin generator stubs out a new plugin. Pass the plugin name, either <em>CamelCased</em> or <em>under_scored</em>, as an argument. Pass <tt>--with-generator</tt> to add an example generator also.</p></div>
+<h3 id="_generate_the_plugin_skeleton">1.2. Generate the plugin skeleton</h3>
+<div class="para"><p>Rails ships with a plugin generator which creates a basic plugin skeleton. Pass the plugin name, either <em>CamelCased</em> or <em>under_scored</em>, as an argument. Pass <tt>--with-generator</tt> to add an example generator also.</p></div>
<div class="para"><p>This creates a plugin in <em>vendor/plugins</em> including an <em>init.rb</em> and <em>README</em> as well as standard <em>lib</em>, <em>task</em>, and <em>test</em> directories.</p></div>
<div class="para"><p>Examples:</p></div>
<div class="listingblock">
<div class="content">
-<pre><tt>./script/generate plugin BrowserFilters
-./script/generate plugin BrowserFilters --with-generator</tt></pre>
+<pre><tt>./script/generate plugin yaffle
+./script/generate plugin yaffle --with-generator</tt></pre>
</div></div>
-<div class="para"><p>Later in the plugin we will create a generator, so go ahead and add the <tt>--with-generator</tt> option now:</p></div>
+<div class="para"><p>To get more detailed help on the plugin generator, type <tt>./script/generate plugin</tt>.</p></div>
+<div class="para"><p>Later on this guide will describe how to work with generators, so go ahead and generate your plugin with the <tt>--with-generator</tt> option now:</p></div>
<div class="listingblock">
<div class="content">
-<pre><tt>script/generate plugin yaffle --with-generator</tt></pre>
+<pre><tt>./script/generate plugin yaffle --with-generator</tt></pre>
</div></div>
<div class="para"><p>You should see the following output:</p></div>
<div class="listingblock">
@@ -430,22 +418,8 @@ create vendor/plugins/yaffle/generators/yaffle/templates
create vendor/plugins/yaffle/generators/yaffle/yaffle_generator.rb
create vendor/plugins/yaffle/generators/yaffle/USAGE</tt></pre>
</div></div>
-<div class="para"><p>For this plugin you won't need the file <em>vendor/plugins/yaffle/lib/yaffle.rb</em> so you can delete that.</p></div>
-<div class="listingblock">
-<div class="content">
-<pre><tt>rm vendor/plugins/yaffle/lib/yaffle.rb</tt></pre>
-</div></div>
-<div class="admonitionblock">
-<table><tr>
-<td class="icon">
-<img src="./images/icons/note.png" alt="Note" />
-</td>
-<td class="content">
-<div class="title">Editor's note:</div>Many plugin authors prefer to keep this file, and add all of the require statements in it. That way, they only line in init.rb would be <tt>require "yaffle"</tt>. If you are developing a plugin that has a lot of files in the lib directory, you may want to create a subdirectory like lib/yaffle and store your files in there. That way your init.rb file stays clean</td>
-</tr></table>
-</div>
<h3 id="_setup_the_plugin_for_testing">1.3. Setup the plugin for testing</h3>
-<div class="para"><p>Testing plugins that use the entire Rails stack can be complex, and the generator doesn't offer any help. In this tutorial you will learn how to test your plugin against multiple different adapters using ActiveRecord. This tutorial will not cover how to use fixtures in plugin tests.</p></div>
+<div class="para"><p>In this guide you will learn how to test your plugin against multiple different adapters using Active Record. This guide will not cover how to use fixtures in plugin tests.</p></div>
<div class="para"><p>To setup your plugin to allow for easy testing you'll need to add 3 files:</p></div>
<div class="ilist"><ul>
<li>
@@ -464,7 +438,6 @@ A test helper that sets up the database before your tests.
</p>
</li>
</ul></div>
-<div class="para"><p>For this plugin you'll need 2 tables/models, Hickwalls and Wickwalls, so add the following files:</p></div>
<div class="para"><p><strong>vendor/plugins/yaffle/test/database.yml:</strong></p></div>
<div class="listingblock">
<div class="content">
@@ -490,7 +463,8 @@ mysql:
:password:
:database: yaffle_plugin_test</tt></pre>
</div></div>
-<div class="para"><p><strong>vendor/plugins/yaffle/test/test_helper.rb:</strong></p></div>
+<div class="para"><p>For this guide you'll need 2 tables/models, Hickwalls and Wickwalls, so add the following:</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/test/schema.rb:</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
@@ -508,10 +482,14 @@ http://www.gnu.org/software/src-highlite -->
t<span style="color: #990000">.</span>datetime <span style="color: #990000">:</span>last_tweeted_at
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
-
-<span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/test/test_helper.rb</span></span>
-
-ENV<span style="color: #990000">[</span><span style="color: #FF0000">'RAILS_ENV'</span><span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="color: #FF0000">'test'</span>
+</tt></pre></div></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/test/test_helper.rb:</strong></p></div>
+<div class="listingblock">
+<div class="content"><!-- Generator: GNU source-highlight 2.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>ENV<span style="color: #990000">[</span><span style="color: #FF0000">'RAILS_ENV'</span><span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="color: #FF0000">'test'</span>
ENV<span style="color: #990000">[</span><span style="color: #FF0000">'RAILS_ROOT'</span><span style="color: #990000">]</span> <span style="color: #990000">||=</span> File<span style="color: #990000">.</span>dirname<span style="color: #990000">(</span><span style="font-weight: bold"><span style="color: #0000FF">__FILE__</span></span><span style="color: #990000">)</span> <span style="color: #990000">+</span> <span style="color: #FF0000">'/../../../..'</span>
<span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">'test/unit'</span>
@@ -522,7 +500,6 @@ ActiveRecord<span style="color: #990000">::</span>Base<span style="color: #99000
db_adapter <span style="color: #990000">=</span> ENV<span style="color: #990000">[</span><span style="color: #FF0000">'DB'</span><span style="color: #990000">]</span>
-<span style="font-style: italic"><span style="color: #9A1900"># no db passed, try one of these fine config-free DBs before bombing.</span></span>
db_adapter <span style="color: #990000">||=</span>
<span style="font-weight: bold"><span style="color: #0000FF">begin</span></span>
<span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">'rubygems'</span>
@@ -547,13 +524,64 @@ ActiveRecord<span style="color: #990000">::</span>Base<span style="color: #99000
<span style="font-weight: bold"><span style="color: #000080">require</span></span> File<span style="color: #990000">.</span>dirname<span style="color: #990000">(</span><span style="font-weight: bold"><span style="color: #0000FF">__FILE__</span></span><span style="color: #990000">)</span> <span style="color: #990000">+</span> <span style="color: #FF0000">'/../init.rb'</span>
<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> Hickwall <span style="color: #990000">&lt;</span> ActiveRecord<span style="color: #990000">::</span>Base
- acts_as_yaffle
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> Wickwall <span style="color: #990000">&lt;</span> ActiveRecord<span style="color: #990000">::</span>Base
- acts_as_yaffle <span style="color: #990000">:</span>yaffle_text_field <span style="color: #990000">=&gt;</span> <span style="color: #990000">:</span>last_tweet<span style="color: #990000">,</span> <span style="color: #990000">:</span>yaffle_date_field <span style="color: #990000">=&gt;</span> <span style="color: #990000">:</span>last_tweeted_at
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
+<h3 id="_run_the_plugin_tests">1.4. Run the plugin tests</h3>
+<div class="para"><p>Once you have these files in place, you can write your first test to ensure that your plugin-testing setup is correct. By default rails generates a file in <em>vendor/plugins/yaffle/test/yaffle_test.rb</em> with a sample test. Replace the contents of that file with:</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/test/yaffle_test.rb:</strong></p></div>
+<div class="listingblock">
+<div class="content"><!-- Generator: GNU source-highlight 2.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><span style="font-weight: bold"><span style="color: #000080">require</span></span> File<span style="color: #990000">.</span>dirname<span style="color: #990000">(</span><span style="font-weight: bold"><span style="color: #0000FF">__FILE__</span></span><span style="color: #990000">)</span> <span style="color: #990000">+</span> <span style="color: #FF0000">'/test_helper.rb'</span>
+
+<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> YaffleTest <span style="color: #990000">&lt;</span> Test<span style="color: #990000">::</span>Unit<span style="color: #990000">::</span>TestCase
+
+ <span style="font-weight: bold"><span style="color: #0000FF">def</span></span> test_active_record_classes_from_test_helper
+ assert_kind_of Hickwall<span style="color: #990000">,</span> Hickwall<span style="color: #990000">.</span>new
+ assert_kind_of Wickwall<span style="color: #990000">,</span> Wickwall<span style="color: #990000">.</span>new
+ <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
+
+<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
+</tt></pre></div></div>
+<div class="para"><p>To run this, go to the plugin directory and run <tt>rake</tt>:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><tt>cd vendor/plugins/yaffle
+rake</tt></pre>
+</div></div>
+<div class="para"><p>You should see output like:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><tt>/opt/local/bin/ruby -Ilib:lib "/opt/local/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake/rake_test_loader.rb" "test/yaffle_test.rb"
+-- create_table(:hickwalls, {:force=&gt;true})
+ -&gt; 0.0220s
+-- create_table(:wickwalls, {:force=&gt;true})
+ -&gt; 0.0077s
+-- initialize_schema_migrations_table()
+ -&gt; 0.0007s
+-- assume_migrated_upto_version(0)
+ -&gt; 0.0007s
+Loaded suite /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake/rake_test_loader
+Started
+.
+Finished in 0.002236 seconds.
+
+1 test, 1 assertion, 0 failures, 0 errors</tt></pre>
+</div></div>
+<div class="para"><p>By default the setup above runs your tests with sqlite or sqlite3. To run tests with one of the other connection strings specified in database.yml, pass the DB environment variable to rake:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><tt>rake DB=sqlite
+rake DB=sqlite3
+rake DB=mysql
+rake DB=postgresql</tt></pre>
+</div></div>
+<div class="para"><p>Now you are ready to test-drive your plugin!</p></div>
</div>
<h2 id="_add_a_tt_to_squawk_tt_method_to_string">2. Add a <tt>to_squawk</tt> method to String</h2>
<div class="sectionbody">
@@ -577,14 +605,13 @@ Require that file from your <em>init.rb</em>.
</ul></div>
<div class="para"><p>Most plugins store their code classes in the plugin's lib directory. When you add a file to the lib directory, you must also require that file from <em>init.rb</em>. The file you are going to add for this tutorial is <em>lib/core_ext.rb</em>.</p></div>
<div class="para"><p>First, you need to write the tests. Testing plugins is very similar to testing rails apps. The generated test file should look something like this:</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/test/core_ext_test.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/test/core_ext_test.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">'test/unit'</span>
+<pre><tt><span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">'test/unit'</span>
<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> CoreExtTest <span style="color: #990000">&lt;</span> Test<span style="color: #990000">::</span>Unit<span style="color: #990000">::</span>TestCase
<span style="font-style: italic"><span style="color: #9A1900"># Replace this with your real tests.</span></span>
@@ -594,15 +621,13 @@ http://www.gnu.org/software/src-highlite -->
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
<div class="para"><p>Start off by removing the default test, and adding a require statement for your test helper.</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/test/core_ext_test.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/test/core_ext_test.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">'test/unit'</span>
-<span style="font-weight: bold"><span style="color: #000080">require</span></span> File<span style="color: #990000">.</span>dirname<span style="color: #990000">(</span><span style="font-weight: bold"><span style="color: #0000FF">__FILE__</span></span><span style="color: #990000">)</span> <span style="color: #990000">+</span> <span style="color: #FF0000">'/test_helper.rb'</span>
+<pre><tt><span style="font-weight: bold"><span style="color: #000080">require</span></span> File<span style="color: #990000">.</span>dirname<span style="color: #990000">(</span><span style="font-weight: bold"><span style="color: #0000FF">__FILE__</span></span><span style="color: #990000">)</span> <span style="color: #990000">+</span> <span style="color: #FF0000">'/test_helper.rb'</span>
<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> CoreExtTest <span style="color: #990000">&lt;</span> Test<span style="color: #990000">::</span>Unit<span style="color: #990000">::</span>TestCase
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
@@ -620,14 +645,13 @@ rake test</tt></pre>
No tests were specified</tt></pre>
</div></div>
<div class="para"><p>Great - now you are ready to start development. The first thing we'll do is to add a method to String called <tt>to_squawk</tt> which will prefix the string with the word &#8220;squawk!&#8221;. The test will look something like this:</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/init.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/init.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> CoreExtTest <span style="color: #990000">&lt;</span> Test<span style="color: #990000">::</span>Unit<span style="color: #990000">::</span>TestCase
+<pre><tt><span style="font-weight: bold"><span style="color: #0000FF">class</span></span> CoreExtTest <span style="color: #990000">&lt;</span> Test<span style="color: #990000">::</span>Unit<span style="color: #990000">::</span>TestCase
<span style="font-weight: bold"><span style="color: #0000FF">def</span></span> test_string_should_respond_to_squawk
assert_equal <span style="font-weight: bold"><span style="color: #0000FF">true</span></span><span style="color: #990000">,</span> <span style="color: #FF0000">""</span><span style="color: #990000">.</span>respond_to?<span style="color: #990000">(:</span>to_squawk<span style="color: #990000">)</span>
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
@@ -641,23 +665,21 @@ http://www.gnu.org/software/src-highlite -->
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/init.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/init.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">"core_ext"</span>
+<pre><tt><span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">"core_ext"</span>
</tt></pre></div></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/lib/core_ext.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/lib/core_ext.rb</span></span>
-
-String<span style="color: #990000">.</span>class_eval <span style="font-weight: bold"><span style="color: #0000FF">do</span></span>
+<pre><tt>String<span style="color: #990000">.</span>class_eval <span style="font-weight: bold"><span style="color: #0000FF">do</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">def</span></span> to_squawk
<span style="color: #FF0000">"squawk! #{self}"</span><span style="color: #990000">.</span>strip
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
@@ -677,14 +699,13 @@ String<span style="color: #990000">.</span>class_eval <span style="font-weight:
<div class="sectionbody">
<div class="para"><p>A common pattern in plugins is to add a method called <tt>acts_as_something</tt> to models. In this case, you want to write a method called <tt>acts_as_yaffle</tt> that adds a <tt>squawk</tt> method to your models.</p></div>
<div class="para"><p>To keep things clean, create a new test file called <em>acts_as_yaffle_test.rb</em> in your plugin's test directory and require your test helper.</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/test/acts_as_yaffle_test.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/test/acts_as_yaffle_test.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #000080">require</span></span> File<span style="color: #990000">.</span>dirname<span style="color: #990000">(</span><span style="font-weight: bold"><span style="color: #0000FF">__FILE__</span></span><span style="color: #990000">)</span> <span style="color: #990000">+</span> <span style="color: #FF0000">'/test_helper.rb'</span>
+<pre><tt><span style="font-weight: bold"><span style="color: #000080">require</span></span> File<span style="color: #990000">.</span>dirname<span style="color: #990000">(</span><span style="font-weight: bold"><span style="color: #0000FF">__FILE__</span></span><span style="color: #990000">)</span> <span style="color: #990000">+</span> <span style="color: #FF0000">'/test_helper.rb'</span>
<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> Hickwall <span style="color: #990000">&lt;</span> ActiveRecord<span style="color: #990000">::</span>Base
acts_as_yaffle
@@ -693,17 +714,17 @@ http://www.gnu.org/software/src-highlite -->
<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> ActsAsYaffleTest <span style="color: #990000">&lt;</span> Test<span style="color: #990000">::</span>Unit<span style="color: #990000">::</span>TestCase
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
+<div class="para"><p><strong>vendor/plugins/lib/acts_as_yaffle.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/lib/acts_as_yaffle.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #0000FF">module</span></span> Yaffle
+<pre><tt><span style="font-weight: bold"><span style="color: #0000FF">module</span></span> Yaffle
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
<div class="para"><p>One of the most common plugin patterns for <tt>acts_as_yaffle</tt> plugins is to structure your file like so:</p></div>
+<div class="para"><p><strong>vendor/plugins/lib/acts_as_yaffle.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
@@ -741,14 +762,13 @@ http://www.gnu.org/software/src-highlite -->
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
<div class="para"><p>Now that test should pass. Since your plugin is going to work with field names, you need to allow people to define the field names, in case there is a naming conflict. You can write a few simple tests for this:</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/test/acts_as_yaffle_test.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/test/acts_as_yaffle_test.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #000080">require</span></span> File<span style="color: #990000">.</span>dirname<span style="color: #990000">(</span><span style="font-weight: bold"><span style="color: #0000FF">__FILE__</span></span><span style="color: #990000">)</span> <span style="color: #990000">+</span> <span style="color: #FF0000">'/test_helper.rb'</span>
+<pre><tt><span style="font-weight: bold"><span style="color: #000080">require</span></span> File<span style="color: #990000">.</span>dirname<span style="color: #990000">(</span><span style="font-weight: bold"><span style="color: #0000FF">__FILE__</span></span><span style="color: #990000">)</span> <span style="color: #990000">+</span> <span style="color: #FF0000">'/test_helper.rb'</span>
<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> ActsAsYaffleTest <span style="color: #990000">&lt;</span> Test<span style="color: #990000">::</span>Unit<span style="color: #990000">::</span>TestCase
<span style="font-weight: bold"><span style="color: #0000FF">def</span></span> test_a_hickwalls_yaffle_text_field_should_be_last_squawk
@@ -769,14 +789,13 @@ http://www.gnu.org/software/src-highlite -->
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
<div class="para"><p>To make these tests pass, you could modify your <tt>acts_as_yaffle</tt> file like so:</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/lib/acts_as_yaffle.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/lib/acts_as_yaffle.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #0000FF">module</span></span> Yaffle
+<pre><tt><span style="font-weight: bold"><span style="color: #0000FF">module</span></span> Yaffle
<span style="font-weight: bold"><span style="color: #0000FF">def</span></span> <span style="font-weight: bold"><span style="color: #0000FF">self</span></span><span style="color: #990000">.</span>included<span style="color: #990000">(</span>base<span style="color: #990000">)</span>
base<span style="color: #990000">.</span>send <span style="color: #990000">:</span>extend<span style="color: #990000">,</span> ClassMethods
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
@@ -795,14 +814,13 @@ http://www.gnu.org/software/src-highlite -->
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
<div class="para"><p>Now you can add tests for the instance methods, and the instance method itself:</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/test/acts_as_yaffle_test.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/test/acts_as_yaffle_test.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #000080">require</span></span> File<span style="color: #990000">.</span>dirname<span style="color: #990000">(</span><span style="font-weight: bold"><span style="color: #0000FF">__FILE__</span></span><span style="color: #990000">)</span> <span style="color: #990000">+</span> <span style="color: #FF0000">'/test_helper.rb'</span>
+<pre><tt><span style="font-weight: bold"><span style="color: #000080">require</span></span> File<span style="color: #990000">.</span>dirname<span style="color: #990000">(</span><span style="font-weight: bold"><span style="color: #0000FF">__FILE__</span></span><span style="color: #990000">)</span> <span style="color: #990000">+</span> <span style="color: #FF0000">'/test_helper.rb'</span>
<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> ActsAsYaffleTest <span style="color: #990000">&lt;</span> Test<span style="color: #990000">::</span>Unit<span style="color: #990000">::</span>TestCase
@@ -843,14 +861,13 @@ http://www.gnu.org/software/src-highlite -->
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/lib/acts_as_yaffle.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/lib/acts_as_yaffle.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #0000FF">module</span></span> Yaffle
+<pre><tt><span style="font-weight: bold"><span style="color: #0000FF">module</span></span> Yaffle
<span style="font-weight: bold"><span style="color: #0000FF">def</span></span> <span style="font-weight: bold"><span style="color: #0000FF">self</span></span><span style="color: #990000">.</span>included<span style="color: #990000">(</span>base<span style="color: #990000">)</span>
base<span style="color: #990000">.</span>send <span style="color: #990000">:</span>extend<span style="color: #990000">,</span> ClassMethods
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
@@ -872,7 +889,15 @@ http://www.gnu.org/software/src-highlite -->
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
-<div class="para"><p>Note the use of <tt>write_attribute</tt> to write to the field in model.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<img src="./images/icons/note.png" alt="Note" />
+</td>
+<td class="content">
+<div class="title">Editor's note:</div>The use of <tt>write_attribute</tt> to write to the field in model is just one example of how a plugin can interact with the model, and will not always be the right method to use. For example, you could also use <tt>send("#{self.class.yaffle_text_field}=", string.to_squawk)</tt>.</td>
+</tr></table>
+</div>
</div>
<h2 id="_create_a_tt_squawk_info_for_tt_view_helper">4. Create a <tt>squawk_info_for</tt> view helper</h2>
<div class="sectionbody">
@@ -895,14 +920,13 @@ Write the tests.
</li>
</ul></div>
<div class="para"><p>First, create the test to define the functionality you want:</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/test/view_helpers_test.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/test/view_helpers_test.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #000080">require</span></span> File<span style="color: #990000">.</span>dirname<span style="color: #990000">(</span><span style="font-weight: bold"><span style="color: #0000FF">__FILE__</span></span><span style="color: #990000">)</span> <span style="color: #990000">+</span> <span style="color: #FF0000">'/test_helper.rb'</span>
+<pre><tt><span style="font-weight: bold"><span style="color: #000080">require</span></span> File<span style="color: #990000">.</span>dirname<span style="color: #990000">(</span><span style="font-weight: bold"><span style="color: #0000FF">__FILE__</span></span><span style="color: #990000">)</span> <span style="color: #990000">+</span> <span style="color: #FF0000">'/test_helper.rb'</span>
<span style="font-weight: bold"><span style="color: #0000FF">include</span></span> YaffleViewHelper
<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> ViewHelpersTest <span style="color: #990000">&lt;</span> Test<span style="color: #990000">::</span>Unit<span style="color: #990000">::</span>TestCase
@@ -916,25 +940,23 @@ http://www.gnu.org/software/src-highlite -->
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
<div class="para"><p>Then add the following statements to init.rb:</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/init.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/init.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">"view_helpers"</span>
+<pre><tt><span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">"view_helpers"</span>
ActionView<span style="color: #990000">::</span>Base<span style="color: #990000">.</span>send <span style="color: #990000">:</span><span style="font-weight: bold"><span style="color: #0000FF">include</span></span><span style="color: #990000">,</span> YaffleViewHelper
</tt></pre></div></div>
<div class="para"><p>Then add the view helpers file and</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/lib/view_helpers.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/lib/view_helpers.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #0000FF">module</span></span> YaffleViewHelper
+<pre><tt><span style="font-weight: bold"><span style="color: #0000FF">module</span></span> YaffleViewHelper
<span style="font-weight: bold"><span style="color: #0000FF">def</span></span> squawk_info_for<span style="color: #990000">(</span>yaffle<span style="color: #990000">)</span>
returning <span style="color: #FF0000">""</span> <span style="font-weight: bold"><span style="color: #0000FF">do</span></span> <span style="color: #990000">|</span>result<span style="color: #990000">|</span>
result <span style="color: #990000">&lt;&lt;</span> yaffle<span style="color: #990000">.</span>read_attribute<span style="color: #990000">(</span>yaffle<span style="color: #990000">.</span><span style="font-weight: bold"><span style="color: #0000FF">class</span></span><span style="color: #990000">.</span>yaffle_text_field<span style="color: #990000">)</span>
@@ -956,12 +978,12 @@ http://www.gnu.org/software/src-highlite -->
<div class="para"><p>When you created the plugin above, you specified the &#8212;with-generator option, so you already have the generator stubs in your plugin.</p></div>
<div class="para"><p>We'll be relying on the built-in rails generate template for this tutorial. Going into the details of generators is beyond the scope of this tutorial.</p></div>
<div class="para"><p>Type:</p></div>
-<div class="literalblock">
+<div class="listingblock">
<div class="content">
<pre><tt>script/generate</tt></pre>
</div></div>
<div class="para"><p>You should see the line:</p></div>
-<div class="literalblock">
+<div class="listingblock">
<div class="content">
<pre><tt>Plugins (vendor/plugins): yaffle</tt></pre>
</div></div>
@@ -978,14 +1000,13 @@ Example:
db/migrate/TIMESTAMP_add_yaffle_fields_to_hickwall</tt></pre>
</div></div>
<div class="para"><p>Now you can add code to your generator:</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/generators/yaffle/yaffle_generator.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/generators/yaffle/yaffle_generator.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> YaffleGenerator <span style="color: #990000">&lt;</span> Rails<span style="color: #990000">::</span>Generator<span style="color: #990000">::</span>NamedBase
+<pre><tt><span style="font-weight: bold"><span style="color: #0000FF">class</span></span> YaffleGenerator <span style="color: #990000">&lt;</span> Rails<span style="color: #990000">::</span>Generator<span style="color: #990000">::</span>NamedBase
<span style="font-weight: bold"><span style="color: #0000FF">def</span></span> manifest
record <span style="font-weight: bold"><span style="color: #0000FF">do</span></span> <span style="color: #990000">|</span>m<span style="color: #990000">|</span>
m<span style="color: #990000">.</span>migration_template <span style="color: #FF0000">'migration:migration.rb'</span><span style="color: #990000">,</span> <span style="color: #FF0000">"db/migrate"</span><span style="color: #990000">,</span> <span style="color: #FF0000">{</span><span style="color: #990000">:</span>assigns <span style="color: #990000">=&gt;</span> yaffle_local_assigns<span style="color: #990000">,</span>
@@ -1026,19 +1047,18 @@ Reuses the built-in rails migration template.
</li>
</ul></div>
<div class="para"><p>When you run the generator like</p></div>
-<div class="literalblock">
+<div class="listingblock">
<div class="content">
<pre><tt>script/generate yaffle bird</tt></pre>
</div></div>
<div class="para"><p>You will see a new file:</p></div>
+<div class="para"><p><strong>db/migrate/20080529225649_add_yaffle_fields_to_birds.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: db/migrate/20080529225649_add_yaffle_fields_to_birds.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> AddYaffleFieldsToBirds <span style="color: #990000">&lt;</span> ActiveRecord<span style="color: #990000">::</span>Migration
+<pre><tt><span style="font-weight: bold"><span style="color: #0000FF">class</span></span> AddYaffleFieldsToBirds <span style="color: #990000">&lt;</span> ActiveRecord<span style="color: #990000">::</span>Migration
<span style="font-weight: bold"><span style="color: #0000FF">def</span></span> <span style="font-weight: bold"><span style="color: #0000FF">self</span></span><span style="color: #990000">.</span>up
add_column <span style="color: #990000">:</span>birds<span style="color: #990000">,</span> <span style="color: #990000">:</span>last_squawk<span style="color: #990000">,</span> <span style="color: #990000">:</span>string
add_column <span style="color: #990000">:</span>birds<span style="color: #990000">,</span> <span style="color: #990000">:</span>last_squawked_at<span style="color: #990000">,</span> <span style="color: #990000">:</span>datetime
@@ -1072,25 +1092,24 @@ Add the method to your generator.
</li>
</ol></div>
<div class="para"><p>Working with the internals of generators is beyond the scope of this tutorial, but here is a basic example:</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/init.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/init.rb</span></span>
-<span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">"commands"</span>
+<pre><tt><span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">"commands"</span>
Rails<span style="color: #990000">::</span>Generator<span style="color: #990000">::</span>Commands<span style="color: #990000">::</span>Create<span style="color: #990000">.</span>send <span style="color: #990000">:</span><span style="font-weight: bold"><span style="color: #0000FF">include</span></span><span style="color: #990000">,</span> Yaffle<span style="color: #990000">::</span>Generator<span style="color: #990000">::</span>Commands<span style="color: #990000">::</span>Create
Rails<span style="color: #990000">::</span>Generator<span style="color: #990000">::</span>Commands<span style="color: #990000">::</span>Destroy<span style="color: #990000">.</span>send <span style="color: #990000">:</span><span style="font-weight: bold"><span style="color: #0000FF">include</span></span><span style="color: #990000">,</span> Yaffle<span style="color: #990000">::</span>Generator<span style="color: #990000">::</span>Commands<span style="color: #990000">::</span>Destroy
Rails<span style="color: #990000">::</span>Generator<span style="color: #990000">::</span>Commands<span style="color: #990000">::</span>List<span style="color: #990000">.</span>send <span style="color: #990000">:</span><span style="font-weight: bold"><span style="color: #0000FF">include</span></span><span style="color: #990000">,</span> Yaffle<span style="color: #990000">::</span>Generator<span style="color: #990000">::</span>Commands<span style="color: #990000">::</span>List
</tt></pre></div></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/lib/commands.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/lib/commands.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">'rails_generator'</span>
+<pre><tt><span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">'rails_generator'</span>
<span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">'rails_generator/commands'</span>
<span style="font-weight: bold"><span style="color: #0000FF">module</span></span> Yaffle <span style="font-style: italic"><span style="color: #9A1900">#:nodoc:</span></span>
@@ -1117,20 +1136,18 @@ http://www.gnu.org/software/src-highlite -->
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/generators/yaffle/templates/definition.txt</strong></p></div>
<div class="listingblock">
<div class="content">
-<pre><tt># File: vendor/plugins/yaffle/generators/yaffle/templates/definition.txt
-
-Yaffle is a bird</tt></pre>
+<pre><tt>Yaffle is a bird</tt></pre>
</div></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/generators/yaffle/yaffle_generator.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/generators/yaffle/yaffle_generator.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> YaffleGenerator <span style="color: #990000">&lt;</span> Rails<span style="color: #990000">::</span>Generator<span style="color: #990000">::</span>NamedBase
+<pre><tt><span style="font-weight: bold"><span style="color: #0000FF">class</span></span> YaffleGenerator <span style="color: #990000">&lt;</span> Rails<span style="color: #990000">::</span>Generator<span style="color: #990000">::</span>NamedBase
<span style="font-weight: bold"><span style="color: #0000FF">def</span></span> manifest
m<span style="color: #990000">.</span>yaffle_definition
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
@@ -1141,14 +1158,13 @@ http://www.gnu.org/software/src-highlite -->
<h2 id="_add_a_custom_route">7. Add a Custom Route</h2>
<div class="sectionbody">
<div class="para"><p>Testing routes in plugins can be complex, especially if the controllers are also in the plugin itself. Jamis Buck showed a great example of this in <a href="http://weblog.jamisbuck.org/2006/10/26/monkey-patching-rails-extending-routes-2">http://weblog.jamisbuck.org/2006/10/26/monkey-patching-rails-extending-routes-2</a>.</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/test/routing_test.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/test/routing_test.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">"#{File.dirname(__FILE__)}/test_helper"</span>
+<pre><tt><span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">"#{File.dirname(__FILE__)}/test_helper"</span>
<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> RoutingTest <span style="color: #990000">&lt;</span> Test<span style="color: #990000">::</span>Unit<span style="color: #990000">::</span>TestCase
@@ -1174,24 +1190,22 @@ http://www.gnu.org/software/src-highlite -->
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/init.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/init.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">"routing"</span>
+<pre><tt><span style="font-weight: bold"><span style="color: #000080">require</span></span> <span style="color: #FF0000">"routing"</span>
ActionController<span style="color: #990000">::</span>Routing<span style="color: #990000">::</span>RouteSet<span style="color: #990000">::</span>Mapper<span style="color: #990000">.</span>send <span style="color: #990000">:</span><span style="font-weight: bold"><span style="color: #0000FF">include</span></span><span style="color: #990000">,</span> Yaffle<span style="color: #990000">::</span>Routing<span style="color: #990000">::</span>MapperExtensions
</tt></pre></div></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/lib/routing.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/lib/routing.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #0000FF">module</span></span> Yaffle <span style="font-style: italic"><span style="color: #9A1900">#:nodoc:</span></span>
+<pre><tt><span style="font-weight: bold"><span style="color: #0000FF">module</span></span> Yaffle <span style="font-style: italic"><span style="color: #9A1900">#:nodoc:</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">module</span></span> Routing <span style="font-style: italic"><span style="color: #9A1900">#:nodoc:</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">module</span></span> MapperExtensions
<span style="font-weight: bold"><span style="color: #0000FF">def</span></span> yaffles
@@ -1201,14 +1215,13 @@ http://www.gnu.org/software/src-highlite -->
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
+<div class="para"><p><strong>config/routes.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: config/routes.rb</span></span>
-
-ActionController<span style="color: #990000">::</span>Routing<span style="color: #990000">::</span>Routes<span style="color: #990000">.</span>draw <span style="font-weight: bold"><span style="color: #0000FF">do</span></span> <span style="color: #990000">|</span>map<span style="color: #990000">|</span>
+<pre><tt>ActionController<span style="color: #990000">::</span>Routing<span style="color: #990000">::</span>Routes<span style="color: #990000">.</span>draw <span style="font-weight: bold"><span style="color: #0000FF">do</span></span> <span style="color: #990000">|</span>map<span style="color: #990000">|</span>
<span style="color: #990000">...</span>
map<span style="color: #990000">.</span>yaffles
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
@@ -1219,32 +1232,34 @@ ActionController<span style="color: #990000">::</span>Routing<span style="color:
<div class="sectionbody">
<h3 id="_work_with_init_rb">8.1. Work with init.rb</h3>
<div class="para"><p>The plugin initializer script <em>init.rb</em> is invoked via <tt>eval</tt> (not <tt>require</tt>) so it has slightly different behavior.</p></div>
-<div class="para"><p>If you reopen any classes in init.rb itself your changes will potentially be made to the wrong module. There are 2 ways around this:</p></div>
-<div class="para"><p>The first way is to explicitly define the top-level module space for all modules and classes, like <tt>::Hash</tt>:</p></div>
+<div class="para"><p>If you reopen any classes in init.rb itself your changes will potentially be made to the wrong module. As a rule, it's better not to open any classes in <tt>init.rb</tt>, and it makes the plugin more difficult to turn into a gem.</p></div>
+<div class="para"><p>A better alternative is to reopen the class in a different file, and require that file from <tt>init.rb</tt>.</p></div>
+<div class="para"><p>If you must reopen a class in <tt>init.rb</tt>, there are various techniques. One way is to use <tt>module_eval</tt> or <tt>class_eval</tt>:</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/init.rb</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/init.rb</span></span>
-
-<span style="font-weight: bold"><span style="color: #0000FF">class</span></span> <span style="color: #990000">::</span>Hash
+<pre><tt>Hash<span style="color: #990000">.</span>class_eval <span style="font-weight: bold"><span style="color: #0000FF">do</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">def</span></span> is_a_special_hash?
<span style="font-weight: bold"><span style="color: #0000FF">true</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
</tt></pre></div></div>
-<div class="para"><p>OR you can use <tt>module_eval</tt> or <tt>class_eval</tt>:</p></div>
+<div class="para"><p>Another way is to explicitly define the top-level module space for all modules and classes, like <tt>::Hash</tt>:</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/init.rb</strong></p></div>
<div class="listingblock">
-<div class="content">
-<pre><tt># File: vendor/plugins/yaffle/init.rb
-
-Hash.class_eval do
- def is_a_special_hash?
- true
- end
-end</tt></pre>
-</div></div>
+<div class="content"><!-- Generator: GNU source-highlight 2.9
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><span style="font-weight: bold"><span style="color: #0000FF">class</span></span> <span style="color: #990000">::</span>Hash
+ <span style="font-weight: bold"><span style="color: #0000FF">def</span></span> is_a_special_hash?
+ <span style="font-weight: bold"><span style="color: #0000FF">true</span></span>
+ <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
+<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
+</tt></pre></div></div>
<h3 id="_generate_rdoc_documentation">8.2. Generate RDoc Documentation</h3>
<div class="para"><p>Once your plugin is stable, the tests pass on all database and you are ready to deploy do everyone else a favor and document it! Luckily, writing documentation for your plugin is easy.</p></div>
<div class="para"><p>The first step is to update the README file with detailed information about how to use your plugin. A few key things to include are:</p></div>
@@ -1298,14 +1313,13 @@ http://www.gnu.org/software/src-highlite -->
<h3 id="_write_custom_rake_tasks_in_your_plugin">8.4. Write custom Rake tasks in your plugin</h3>
<div class="para"><p>When you created the plugin with the built-in rails generator, it generated a rake file for you in <em>vendor/plugins/yaffle/tasks/yaffle.rake</em>. Any rake task you add here will be available to the app.</p></div>
<div class="para"><p>Many plugin authors put all of their rake tasks into a common namespace that is the same as the plugin, like so:</p></div>
+<div class="para"><p><strong>vendor/plugins/yaffle/tasks/yaffle.rake</strong></p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
-<pre><tt><span style="font-style: italic"><span style="color: #9A1900"># File: vendor/plugins/yaffle/tasks/yaffle.rake</span></span>
-
-namespace <span style="color: #990000">:</span>yaffle <span style="font-weight: bold"><span style="color: #0000FF">do</span></span>
+<pre><tt>namespace <span style="color: #990000">:</span>yaffle <span style="font-weight: bold"><span style="color: #0000FF">do</span></span>
desc <span style="color: #FF0000">"Prints out the word 'Yaffle'"</span>
task <span style="color: #990000">:</span>squawk <span style="color: #990000">=&gt;</span> <span style="color: #990000">:</span>environment <span style="font-weight: bold"><span style="color: #0000FF">do</span></span>
puts <span style="color: #FF0000">"squawk!"</span>
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-30 14:56:59 +0000