before_filter in Ruby on Rails 4

Add a hook method like before_action or after_action to controllers.

before_render is called when:

• After the action is finished and,
• Before the view is rendered

Usage

• Put before_render.rb to app/controllers/concerns
• Write code like follows in controllers

class UsersController < ApplicationController
  include BeforeRender

  before_render :foo, only: [:show]
  before_render unless: [:destroy] do |controller|
  bar
  end

  def foo
  end

  def bar
  end
end