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  1. PO
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    <p>I just ran into this as well. There are (at least?) 2 possible problems:</p> <ul> <li><strong>Your module is not in the autoload path</strong></li> </ul> <p>Look in <code>config/application.rb</code> for this line:</p> <pre><code>config.autoload_paths += %W(#{config.root}/extras) </code></pre> <p>If it's commented, uncomment it. This line will turn on autoloading for all files inside <code>extras</code>, and all files in subdirectories of <code>extras</code>, too. It's probably safest to move your modules into <code>extras</code>, but if you really want to leave them in <code>lib</code>, change the line to be:</p> <pre><code>config.autoload_paths += %W(#{config.root}/extras #{config.root}/lib) </code></pre> <ul> <li><strong>Your module is in the autoload path, but not named the way Rails expects</strong></li> </ul> <p>(see this: <a href="https://stackoverflow.com/questions/2796027/rails-2-3-5-how-does-one-access-code-inside-of-lib-directory-file-rb">Rails 2.3.5: How does one access code inside of lib/directory/file.rb?</a>)</p> <p>By convention, Rails wants the name of your module to match the directory hierarchy and the filename. So the file <code>extras/mylib.rb</code> would be expected to contain</p> <pre><code>module Mylib # not MyLib or My_lib ... end </code></pre> <p>This works for subdirectories as well, so a file <code>extras/mydir/mylib.rb</code> should contain:</p> <pre><code>module Mydir module Mylib # or class Mylib ... end end </code></pre> <p>This naming convention is the same as what Rails expects for controllers and models. Underscores in the filename turn into a camelcase class/module name. A file called <code>my_lib.rb</code> would be expected to have a <code>module MyLib</code> in it (but not <code>Mylib</code>).</p> <p><strong>NOTE</strong> that <em>autoload</em> does not mean that the module is automatically loaded at startup; rather, it's automatically loaded when it's first used. So even if you have some code like <code>puts "hi from mylib"</code> at the top of your <code>mylib.rb</code> file, you won't see that print until your code uses <code>Mylib</code> somewhere.</p> <p>Finally, if you really want your modules to load <em>at startup</em>, go create a file called <code>config/initializers/force_load_libraries.rb</code> and put this in there:</p> <pre><code>Dir.glob("#{Rails.root}/extras/force_load/*.rb").each { |f| require f } </code></pre> <p>Now go put your libs in <code>extras/force_load</code> and they should load when Rails starts up.</p>
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    1. POwritting tests for modules in lib folder
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    1. USCommunity
    1. USDave
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    1. CODave I was doing all that and it did not work
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      1. USserengeti12
 

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