Method: ActiveRecord::Base.object_id_attr

Defined in:
lib/active_record_extensions/active_record_extensions.rb

.object_id_attr(symbol, klass) ⇒ Object 



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# File 'lib/active_record_extensions/active_record_extensions.rb', line 12

def self.object_id_attr(symbol, klass)
  module_eval %{
    def #{symbol}
      if @#{symbol}.nil? or (@old_#{symbol}_id != #{symbol}_id)
        @old_#{symbol}_id = #{symbol}_id
        klass = #{klass}.descendants.find { |d| d.#{symbol}_name == #{symbol}_id }
        klass ||= #{klass}
        @#{symbol} = klass.new
      else
        @#{symbol}
      end
    end
  }
end