gist: 126017


  
    
      Ruby
    
    
      
      
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              class AbstractTopLevelController < ApplicationController
  class_inheritable_accessor :model
 
  def index
    model.classify.constantize.all
  end
end
 
class AbstractNestedController < ApplicationController
  class_inheritable_accessor :model
  class_inheritable_accessor :parent
 
  def index
    parent.classify.constantize.find(params["#{parent}_id".to_sym].send(model).all
  end
end
 
class FooController < AbstractTopLevelController
  self.model = "foo"
end
 
class NestedFooController < AbstractNestedController
  self.model = "foo"
  self.parent = "bar"
end