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 reflection = reflect_on_association(association_name)
reflection.options[:autosave] = true
add_autosave_association_callbacks(reflection)
nested_attributes_options = self.nested_attributes_options.dup
nested_attributes_options[association_name.to_sym] = options
self.nested_attributes_options = nested_attributes_options
type = (reflection.collection? ? :collection : :one_to_one)
generated_feature_methods.module_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, mass_assignment_options)
end
", __FILE__, __LINE__ + 1
else
raise ArgumentError, "No association found for name `#{association_name}'. Has it been defined yet?"
end
end
end