如何为可以访问 cookies 和 session 的控制器创建 rails 服务

Question

I want to create a service to DRY my controllers, and make them more readable (and avoid the use of concerns ), but this is not a common service, because it'll be able to get and set cookies and session entries. How can I achieve that?

Thanks!

Answer 1

You could create a services something like:

class FooService

  delegate *%w(
    session
    cookies
  ), to: :controller

  class << self 

    def call(args={})
      new(args).call
    end

  end # Class Methods

  #=====================================================================
  # Instance Methods      
  #=====================================================================

  def initialize(args)
    args.each do |k,v|
      class_eval do 
        attr_accessor k
      end
      send("#{k}=",v)
    end        
  end

  def call

  end

end

And then, from within your controller, call it something like:

FooService.call controller: self, other: :args

When called this way, you'll have the methods controller and other in the instance of FooService that hold the values of controller (the one that called the service) and :args , respectively. You'll also have the methods session and cookies that are the session and cookies held by the controller . Then, you can do with them as you like.