Module: DataMapper::CallbacksHelper

Defined in:
lib/data_mapper/callbacks.rb

Overview

CallbacksHelper adds a class-method ClassMethods#callbacks when included in a class, and defines short-cut class-methods to add delegates to callbacks for the built-in Callbacks::EVENTS.

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Class Method Details

.included(base) ⇒ Object

The ::included callback extends the included class with a ::callbacks method, and sets up helper methods for the standard events declared in Callbacks::EVENTS.



11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
# File 'lib/data_mapper/callbacks.rb', line 11

def self.included(base)
  base.extend(ClassMethods)
  
  # Declare helpers for the standard EVENTS
  Callbacks::EVENTS.each do |name|
    base.class_eval <<-EOS
      def self.#{name}(string = nil, &block)
        if string.nil?
          callbacks.add(:#{name}, block)
        else
          callbacks.add(:#{name}, string)
        end
      end
    EOS
  end
end