在助手中创建一个“包含”的Rails控制器动作

Question

Is it possible to make an includable controller action within a Rails Helper through an included block? I'm thinking something like this:

module XablauHelper
  included do
    def my_shared_action
      true
    end
  end
end

Already tried doing it through class.eval block and through using like a class method ie self.my_shared_action but no success, I have already found a solution that is making a parent controller with the desired shared actions and inheriting from it, but for the sake of modular design I would like to make it a more "global" approach, so I could gemify my solution and reuse code, any suggestions that doesn't use inheritance?

Answer 1

Adding controller actions in a helper is probably the wrong choice, as these methods are intended for your views .

Consider using controller concerns instead, and including them where required. For example:

# in app/controllers/concerns/useful_functions_concern.rb
module UsefulFunctionsConcern
  extend ActiveSupport::Concern

  included do
    rescue_from SomeException, with: :handle_access_denied
  end

  def useful_method
    # ...
  end

  protected
  def handle_access_denied
    # ...
  end
end

# in your controller
class XyzController < ApplicationController
  include UsefulFunctionsConcern

  def index
    useful_method
  end
end

Where common controller actions can be shared and the controllers have something in common eg they are all API controllers, also consider using inheritance to achieve this. For example:

# parent controller
class ApiController < ApplicationController
  def my_shared_action
  end
end

class SpecificApiController < ApiController
end