How does Rails find models and controllers? How can I get it to load more models?

Posted by David on Stack Overflow See other posts from Stack Overflow or by David
Published on 2010-12-26T09:43:40Z Indexed on 2010/12/26 9:54 UTC
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Filed under:

ruby-on-rails

|

ruby

|

activerecord

I'm trying to create a non-ActiveRecord model in app/models/gamestate.rb. Then inside my controller (PlayController) I should be able to do GameState.new, right? No go:

NameError (uninitialized constant PlayController::GameState):
  app/controllers/play_controller.rb:23:in `play'

(at least in the development environment)

But! If I do have a model called app/models/play.rb, then it's automatically loaded and I can do Play.new.

So my question is: how does Rails know which classes to load? What sort of name mangling does it do to get from play#action to PlayController to app/controllers/play_controller.rb to app/models/play.rb?

It seems awfully fragile, but maybe a better understanding of how this works would help.

And finally, how can I get it to load app/models/gamestate.rb?

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