Access the except part of before_action in the controller itself

Question

So I have a controller, say

class RandomActionController < ApplicationController

and I have a method check_authorization in ApplicationController that I use in RandomActionController as

before_action :check_authorization, except: [:create, :get_actions, ..]

Now in another action inside RandomActionController, I might be building an array of actions excluding ones in the except section of check_authorization, or whatever. My problem is, how do I get those actions as a hash/array or any other form?

Answer 1

What you are passing to the except part is a literal array, string or symbol. Rails does not let you (afaik) introspect a controller callback to extract the arguments it was declared with.

If you want to be able to a re-use list of actions it you need to link it to an identifier.

For example this a pattern I often use:

class ApplicationController

  private

  def self.member_actions
    [:show, :edit, :destroy, :update]
  end

  def self.collection_actions
    [:new, :index, :create]
  end
end

class FooController < ApplicationController
  before_action :set_foo, only: member_actions

  def self.member_actions
    super + [:fuzzle, :wuzzle]
  end 
end

But you can just as well use constants or anything else that is available in the class context.