stephanschubert/concerned_with

ActiveRecord extension for splitting up a model's concerns into separate files

= ConcernedWith, an ActiveRecord extension

ConcernedWith allows you to split up a model's several concerns into
separate files to keep your code clear and modularized.

This version is a bit more sophisticated as it uses the include-mechanism
instead of re-opening the model's class. It required a bit more setup
but provides more flexibility on the other hand.

Inspired by Rick Olson's original code.


== Installation

In your application root do:

$ git submodule add git://github.com/jazen/concerned_with.git vendor/plugins/concerned_with


== How to use

# app/models/user.rb

class User < ActiveRecord::Base
  concerned_with :authentication, :validations
end


# app/models/user/authentication.rb

module User::Authentication

  def self.included(base)
    base.extend ClassMethods
  end

  module ClassMethods
  
    def authenticate(name, password)
      ...
    end

  end

end


# app/models/user/validations.rb

module User::Validations

  def self.included(base)
    base.validates_presence_of :name, :email
  end

end


== Template code for your convenience

module Model::Concern

  def self.included(base)
    base.extend ClassMethods
    base.send :include, InstanceMethods

    # You can use base.alias_method_chain and other cool things here!
    ...
  end

  module ClassMethods
    ...
  end

  module InstanceMethods
    ...
  end

end



Copyright (c) 2009 Stephan Schubert, released under the MIT license