Module: MongoMapper::Plugins::Associations::NestedAttributes::ClassMethods

Defined in:
lib/mongo_mapper/plugins/associations/nested_attributes.rb

Instance Method Summary collapse

Instance Method Details

#accepts_nested_attributes_for(*attr_names) ⇒ Object 



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# File 'lib/mongo_mapper/plugins/associations/nested_attributes.rb', line 20

def accepts_nested_attributes_for(*attr_names)
  options = { :allow_destroy => false, :update_only => false }
  options.update(attr_names.extract_options!)
  options.assert_valid_keys(:allow_destroy, :reject_if, :limit, :update_only)
  options[:reject_if] = REJECT_ALL_BLANK_PROC if options[:reject_if] == :all_blank

  attr_names.each do |association_name|
    if association = associations[association_name]
      type = (association.many? ? :collection : :one_to_one)
      nested_attributes_options[association_name.to_sym] = options

      class_eval %{
        if method_defined?(:#{association_name}_attributes=)
          remove_method(:#{association_name}_attributes=)
        end
        def #{association_name}_attributes=(attributes)
          assign_nested_attributes_for_#{type}_association(:#{association_name}, attributes)
        end
      }, __FILE__, __LINE__
    else
      raise ArgumentError, "No association found for name '#{association_name}'. Has it been defined yet?"
    end
  end
end