Rails Observer Alternatives for 4.0

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Take a look at Concerns

Create a folder in your models directory called concerns. Add a module there:

module MyConcernModule
  extend ActiveSupport::Concern

  included do
    after_save :do_something
  end

  def do_something
     ...
  end
end

Next, include that in the models you wish to run the after_save in:

class MyModel < ActiveRecord::Base
  include MyConcernModule
end

Depending on what you’re doing, this might get you close without observers.

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