"Sequel::Observer" provides an easy (ActiveRecord-like) way to create the Observers for callbacks in the models of Sequel ORM.

For example, imagine a User model where we want to send an email every time a new user is created.

Since sending emails is not directly related to our model's purpose, we could create an observer to delegate that functionality.

  class UserObserver < Sequel::Observer
    def after_create(model_instance_record)
      # code to send confirmation email...
    end
  end

The observer's methods receive the instance of the model that caused the callback to fire as a parameter.

RubyGems is the preferred easy to install method for "Sequel::Observer".

$ sudo gem install sequel_observer

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