Module: AcceptsFlattenedValues::ClassMethods

Defined in:
lib/accepts-flattened-values.rb

Instance Method Summary collapse

Instance Method Details

#accepts_flattened_values_for(*attr_names) ⇒ Object 



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# File 'lib/accepts-flattened-values.rb', line 15

def accepts_flattened_values_for(*attr_names)
  options = { :separator => ",", :attribute => :value }
  options.update(attr_names.extract_options!)
  options.assert_valid_keys(:separator, :attribute)

  attr_names.each do |association_name|
    if reflection = reflect_on_association(association_name)
      reflection.options[:autosave] = true
      add_autosave_association_callbacks(reflection)

      options = options.merge(:klass => reflection.klass)
      self.flattened_values_options = flattened_values_options.merge(association_name.to_sym => options)

      unless reflection.collection?
        raise ArugmentError, "Assocation `#{association_name}' must be a has_many or has_and_belongs_to_many."
      end

      # def pirate_values
      #   retrieve_flattened_values_for_association(:pirate)
      # end
      # def pirate_values=(string)
      #   assign_flattened_values_for_association(:pirate, string)
      # end
      class_eval <<-RUBY, __FILE__, __LINE__ + 1
        if method_defined?(:#{association_name}_values)
          remove_method(:#{association_name}_values)
        end
        def #{association_name}_values
          retrieve_flattened_values_for_association(:#{association_name})
        end
        if method_defined?(:#{association_name}_values=)
          remove_method(:#{association_name}_values=)
        end
        def #{association_name}_values=(string)
          assign_flattened_values_for_association(:#{association_name}, string)
        end
      RUBY
    else
      raise ArgumentError, "No association found for name `#{association_name}'. Has it been defined yet?"
    end
  end
end