```ruby
module Spree
  module Api
    module ControllerSetup
      def self.included(klass)
        klass.class_eval do
          include AbstractController::Rendering
          include AbstractController::ViewPaths
          include AbstractController::Callbacks
          include AbstractController::Helpers

          include ActiveSupport::Rescuable

          include ActionController::Rendering
          include ActionController::ImplicitRender
          include ActionController::Rescue
          include ActionController::MimeResponds

          include CanCan::ControllerAdditions
          append_view_path File.expand_path("../../../app/views", File.dirname(__FILE__))

          respond_to :json
        end
      end
    end
  end
end
```

Prepend app's view path to view path lookups so views can be overriden
user
```ruby
module Spree
  module Api
    module ControllerSetup
      def self.included(klass)
        klass.class_eval do
          include AbstractController::Rendering
          include AbstractController::ViewPaths
          include AbstractController::Callbacks
          include AbstractController::Helpers

          include ActiveSupport::Rescuable

          include ActionController::Rendering
          include ActionController::ImplicitRender
          include ActionController::Rescue
          include ActionController::MimeResponds

          include CanCan::ControllerAdditions
          prepend_view_path Rails.root + "app/views"
          append_view_path File.expand_path("../../../app/views", File.dirname(__FILE__))

          respond_to :json
        end
      end
    end
  end
end
```
assistant