如何更新模型对象的关联对象？

Question

我想要像下面这样的东西:

@user.update_attributes(:name => "Obama", :profile => { :current_location => 'US' })

用户has_one个人资料.

Answer 1

使它们成为'嵌套属性'.文件说:

考虑具有一个头像的会员模型:

  class Member < ActiveRecord::Base
    has_one :avatar
    accepts_nested_attributes_for :avatar
  end

...

允许您通过成员更新头像:

  params = { :member' => { :avatar_attributes => { :id => '2', :icon => 'sad' } } }
  member.update_attributes params['member']
  member.avatar.icon # => 'sad'