title: Unitialized constant but the class exists
body: <p>I'm having an issue making an app that plays music in rails.  I can't seem to actually obtain the properties of the songs from the database.    The model class is named 'Music'.  The error I get is this:</p>
  
  <p><code>uninitialized constant Music::Title</code></p>
  
  <p>When trying to run this code:</p>
  
  <pre><code>&lt;div id="player"&gt;
  
  &lt;% @musics.each do |song| %&gt;
  
  
  &lt;%= song.title %&gt;
  &lt;div&gt;Play sound #1: &lt;a href="#" onclick="play('sound1');"&gt;play&lt;/a&gt;&lt;/div&gt;
  
  
  
  &lt;% end %&gt;
  &lt;%= initialize_sounds(sounds, debug=false) %&gt;
  </code></pre>
  
  <p>      </p>
  
  <p>The properties of the Music Class are </p>
  
  <pre><code>create_table "musics", :force =&gt; true do |t|
  
      t.integer  "song_id"
      t.string   "title"
      t.string   "tracklist"
      t.string   "info"
      t.string   "music_location"
      t.datetime "created_at"
      t.datetime "updated_at"
    end
  </code></pre>
  
  <p>What's interesting is that if I take out the song.title, I will get two entries of the 'play sound #1 div'.  Which means that it recognizes that there are two entries in the database.  What am I doing wrong to obtain the properties from the model?  This is being viewed through a rendered partial.  I was able to do something similar with a posts model in the app and it worked fine.  I created a database query called @musics to find the songs.  I tried changing the variable from @musics to @songs in case the app got confused but no luck.  Also, if I use the standard scaffold to view the index of the songs, they all show up fine.  Any suggestions would be greatly appreciated.</p>
  
  <p>---Update------<br>
  Here is the music.rb file:</p>
  
  <pre><code>class Music &lt; ActiveRecord::Base
    has_one :title
    has_one :music_location
    validates_uniqueness_of :song_id
  
  
    def self.save(upload)
      name = upload['datafile']
      directory = "public/music/"
      # create the file path
      path = File.join(directory, name)
      #write the file
      File.open(path, "wb") { |f| f.write(upload['datafile'])}
  
    end
  
    def self.player
      find(:all, :conditions=&gt; "select == true")
    end
  
  
  end
  </code></pre>
  
  <p>And here is the development log info:  </p>
  
  <pre><code>Started GET "/" for 127.0.0.1 at 2011-12-31 08:28:53 -0600
    Processing by PagesController#_home as HTML
    [1m[35mMusic Load (0.0ms)[0m  SELECT "musics".* FROM "musics" 
    [1m[36mPost Load (0.0ms)[0m  [1mSELECT "posts".* FROM "posts" [0m
  Rendered posts/_news.html.erb (24.0ms)
  Rendered pages/_home.html.erb within layouts/application (28.0ms)
    [1m[35mCACHE (0.0ms)[0m  SELECT "posts".* FROM "posts" 
  Rendered posts/_news.html.erb (1.0ms)
  Rendered pages/_home.html.erb (2.0ms)
  Rendered musics/_player.html.erb (5.0ms)
  Rendered pages/_music.html.erb (11.0ms)
  Completed 500 Internal Server Error in 93ms
  
  ActionView::Template::Error (uninitialized constant Music::Title):
      3:  &lt;% @musics.each do |song| %&gt;
  
      4:  
  
      5:  
  
      6:  &lt;%= song.title %&gt;
  
      7:  &lt;div&gt;Play sound #1: &lt;a href="#" onclick="play('sound1');"&gt;play&lt;/a&gt;&lt;/div&gt;
  
      8:  
  
      9:  
  
    app/views/musics/_player.html.erb:6:in `block in _app_views_musics__player_html_erb__288302969_49298280'
    app/views/musics/_player.html.erb:3:in `each'
    app/views/musics/_player.html.erb:3:in `_app_views_musics__player_html_erb__288302969_49298280'
    app/views/pages/_music.html.erb:12:in `_app_views_pages__music_html_erb___111175075_22835100'
    app/views/layouts/application.html.erb:48:in `_app_views_layouts_application_html_erb__149306977_49748748'
  
  Rendered c:/Ruby192/lib/ruby/gems/1.9.1/gems/actionpack-3.1.1/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.0ms)
  Rendered c:/Ruby192/lib/ruby/gems/1.9.1/gems/actionpack-3.1.1/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.0ms)
  Rendered c:/Ruby192/lib/ruby/gems/1.9.1/gems/actionpack-3.1.1/lib/action_dispatch/middleware/templates/rescues/template_error.erb within rescues/layout (24.0ms)
  </code></pre>
  
  <p>and the full trace  </p>
  
  <pre><code>activerecord (3.1.1) lib/active_record/base.rb:1341:in `compute_type'
  activerecord (3.1.1) lib/active_record/reflection.rb:173:in `klass'
  activerecord (3.1.1) lib/active_record/associations/association.rb:118:in `klass'
  activerecord (3.1.1) lib/active_record/associations/association.rb:166:in `find_target?'
  activerecord (3.1.1) lib/active_record/associations/association.rb:138:in `load_target'
  activerecord (3.1.1) lib/active_record/associations/association.rb:56:in `reload'
  activerecord (3.1.1) lib/active_record/associations/singular_association.rb:9:in `reader'
  activerecord (3.1.1) lib/active_record/associations/builder/association.rb:41:in `block in define_readers'
  app/views/musics/_player.html.erb:6:in `block in _app_views_musics__player_html_erb__288302969_39714996'
  app/views/musics/_player.html.erb:3:in `each'
  app/views/musics/_player.html.erb:3:in `_app_views_musics__player_html_erb__288302969_39714996'
  actionpack (3.1.1) lib/action_view/template.rb:144:in `block in render'
  activesupport (3.1.1) lib/active_support/notifications.rb:55:in `instrument'
  actionpack (3.1.1) lib/action_view/template.rb:142:in `render'
  actionpack (3.1.1) lib/action_view/renderer/partial_renderer.rb:256:in `render_partial'
  actionpack (3.1.1) lib/action_view/renderer/partial_renderer.rb:228:in `block (2 levels) in render'
  actionpack (3.1.1) lib/action_view/renderer/abstract_renderer.rb:33:in `block in instrument'
  activesupport (3.1.1) lib/active_support/notifications.rb:53:in `block in instrument'
  activesupport (3.1.1) lib/active_support/notifications/instrumenter.rb:21:in `instrument'
  activesupport (3.1.1) lib/active_support/notifications.rb:53:in `instrument'
  actionpack (3.1.1) lib/action_view/renderer/abstract_renderer.rb:33:in `instrument'
  actionpack (3.1.1) lib/action_view/renderer/partial_renderer.rb:227:in `block in render'
  actionpack (3.1.1) lib/action_view/renderer/abstract_renderer.rb:22:in `wrap_formats'
  actionpack (3.1.1) lib/action_view/renderer/partial_renderer.rb:219:in `render'
  actionpack (3.1.1) lib/action_view/renderer/renderer.rb:41:in `render_partial'
  actionpack (3.1.1) lib/action_view/helpers/rendering_helper.rb:27:in `render'
  app/views/pages/_music.html.erb:12:in `_app_views_pages__music_html_erb___111175075_22835100'
  actionpack (3.1.1) lib/action_view/template.rb:144:in `block in render'
  activesupport (3.1.1) lib/active_support/notifications.rb:55:in `instrument'
  actionpack (3.1.1) lib/action_view/template.rb:142:in `render'
  actionpack (3.1.1) lib/action_view/renderer/partial_renderer.rb:256:in `render_partial'
  actionpack (3.1.1) lib/action_view/renderer/partial_renderer.rb:228:in `block (2 levels) in render'
  actionpack (3.1.1) lib/action_view/renderer/abstract_renderer.rb:33:in `block in instrument'
  activesupport (3.1.1) lib/active_support/notifications.rb:53:in `block in instrument'
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  actionpack (3.1.1) lib/action_view/renderer/abstract_renderer.rb:22:in `wrap_formats'
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  actionpack (3.1.1) lib/action_view/helpers/rendering_helper.rb:27:in `render'
  app/views/layouts/application.html.erb:48:in `_app_views_layouts_application_html_erb__149306977_49748748'
  actionpack (3.1.1) lib/action_view/template.rb:144:in `block in render'
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  actionpack (3.1.1) lib/action_view/renderer/template_renderer.rb:12:in `block in render'
  actionpack (3.1.1) lib/action_view/renderer/abstract_renderer.rb:22:in `wrap_formats'
  actionpack (3.1.1) lib/action_view/renderer/template_renderer.rb:9:in `render'
  actionpack (3.1.1) lib/action_view/renderer/renderer.rb:36:in `render_template'
  actionpack (3.1.1) lib/action_view/renderer/renderer.rb:17:in `render'
  actionpack (3.1.1) lib/abstract_controller/rendering.rb:120:in `_render_template'
  actionpack (3.1.1) lib/action_controller/metal/streaming.rb:250:in `_render_template'
  actionpack (3.1.1) lib/abstract_controller/rendering.rb:114:in `render_to_body'
  actionpack (3.1.1) lib/action_controller/metal/renderers.rb:30:in `render_to_body'
  actionpack (3.1.1) lib/action_controller/metal/compatibility.rb:43:in `render_to_body'
  actionpack (3.1.1) lib/abstract_controller/rendering.rb:99:in `render'
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  actionpack (3.1.1) lib/action_controller/metal/instrumentation.rb:40:in `block (2 levels) in render'
  activesupport (3.1.1) lib/active_support/core_ext/benchmark.rb:5:in `block in ms'
  c:/Ruby192/lib/ruby/1.9.1/benchmark.rb:310:in `realtime'
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  activesupport (3.1.1) lib/active_support/callbacks.rb:386:in `_run_process_action_callbacks'
  activesupport (3.1.1) lib/active_support/callbacks.rb:81:in `run_callbacks'
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  actionpack (3.1.1) lib/action_dispatch/middleware/remote_ip.rb:48:in `call'
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  rack (1.3.5) lib/rack/runtime.rb:17:in `call'
  activesupport (3.1.1) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
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  railties (3.1.1) lib/rails/engine.rb:456:in `call'
  railties (3.1.1) lib/rails/rack/content_length.rb:16:in `call'
  railties (3.1.1) lib/rails/rack/log_tailer.rb:14:in `call'
  rack (1.3.5) lib/rack/handler/webrick.rb:59:in `service'
  c:/Ruby192/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service'
  c:/Ruby192/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run'
  c:/Ruby192/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread'
  </code></pre>