Module: DelegateAttributes::ActiveRecordExtension::ClassMethods

Defined in:
lib/delegate_attributes/models/active_record_extension.rb

Instance Method Summary collapse

Instance Method Details

#delegate_attributes(*args) ⇒ Object 



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# File 'lib/delegate_attributes/models/active_record_extension.rb', line 12

def delegate_attributes(*args)
  options = args.extract_options!
  errors_option = options.delete(:errors)
				writer_option = options.delete(:writer)
				
  writer_regexp = /=\z/
  readers = args.select {|a| a.to_s !=~ writer_regexp}
  writers = args.select {|a| a.to_s =~ writer_regexp}
  if writer_option == true
    writers += readers.map {|a| "#{a}="}
  end

  class_eval do
    delegate *(readers + writers), options.dup
  end          
  
  unless errors_option == false
    class_eval <<-EOV
      validate do
        object = #{options[:to]}
        #{"object.instance_variable_set(:@errors, DelegateAttributes::FakeErrors.new(object))" if errors_option.to_s == "fit"}
        if !object.valid?
          object.errors.messages.each do |attribute, suberrors|
            if attribute.to_s.in? %w{#{readers.join(" ")}}
              suberrors.each do |suberror|
                errors.add(attribute, suberror)
              end
            end
          end
        end
      end
    EOV
  end
end