Thoughts on Decorator

controller.rb

class SomeController < AC::Base
  # defines the general view model along with a way to introduce the state and pre-scope models
  view_model = MyGeneralViewModel do |state|
    user = get_user
    state.user = user
    state.scope = Model.where(:user => user)
  end

  # interact with the view model just like an active record  model
  # scopes would be present and things would feel like AR
  # All instances returned would be wrapped in an instance of the decorator with 
  # the declared state introduced. It would be like instantiating a view model with...
  #
  # ViewModel.new(ar_model, user, other_data)

  def index
    items = view_model.where(:field_1 => params[:field_1], :field_2 => params[:field_2])
    render items
  end

  def index
    item = view_model.find(params[:id])
    render item
  end

end