In most cases you will have the same old code in your controllers, this gem allows some very basic assumptions while giving you the option to override the behavior. This allows your controllers to be limited to just the required code.

Assumptions this code makes:

1. The controller is named for the model. e.g. ArticlesController will assume Article model.
2. Standard restful actions: index, show, new, create, edit, update, destroy.
3. A method named permitted_attributes exists for permitted_params.

Here's an example of the bare minimum code required to get started:

ArticlesController < ApplicationController
  include ImplicitResource # Opt in to implicit behavior, or include it in ApplicationController.

  private

  def permitted_attributes(resource)
    params.require(:article).permit(:title, :body)
  end
end

Add this line to your application's Gemfile:

gem "implicit_resource"

Add this line to your controller

include ImplicitResource

ImplicitResource only targets basic controller functionality. Everything that implicit_resource does can be overriden in the controller.

You can override the collection and resource methods to achieve more flexibility in how things are queried.

ArticlesController < ApplicationController
  include ImplicitResource

  private

  def collection # Collection is a placeholder for any collection of objects to be returned
    model_klass.includes(:comments).search(title: params[:title_search_terms])
  end

  def resource # Resource is a placeholder for any single object to be returned
    collection.find_by(token_id: params[:token_id])
  end
end

You can override the model_klass method to allow for controller/model naming mismatch.

ArticlesController < ApplicationController
  include ImplicitResource

  private

  def model_klass
    Story
  end
end

The gem is available as open source under the terms of the MIT License.