From 71b15603fddd85602813d1c96857e2674b6075d0 Mon Sep 17 00:00:00 2001 From: Felipe Oliveira Date: Tue, 3 Oct 2017 08:41:12 -0300 Subject: [PATCH] Add update_only example to AR nested attributes doc [ci_skip] --- activerecord/lib/active_record/nested_attributes.rb | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/activerecord/lib/active_record/nested_attributes.rb b/activerecord/lib/active_record/nested_attributes.rb index 435c81c153..fa20bce3a9 100644 --- a/activerecord/lib/active_record/nested_attributes.rb +++ b/activerecord/lib/active_record/nested_attributes.rb @@ -63,6 +63,18 @@ module ActiveRecord # member.update params[:member] # member.avatar.icon # => 'sad' # + # If you want to update the current avatar without providing the id, you must add :update_only option. + # + # class Member < ActiveRecord::Base + # has_one :avatar + # accepts_nested_attributes_for :avatar, update_only: true + # end + # + # params = { member: { avatar_attributes: { icon: 'sad' } } } + # member.update params[:member] + # member.avatar.id # => 2 + # member.avatar.icon # => 'sad' + # # By default you will only be able to set and update attributes on the # associated model. If you want to destroy the associated model through the # attributes hash, you have to enable it first using the