ruby-on-rails - 从关联方法中访问 Rails proxy_association.owner

Question

有没有办法从关联方法中访问 proxy_association 对象？

例子:

class User < ActiveRecord:Base
  has_many :accounts
end

class Account < ActiveRecord:Base
  belongs_to :user

  def some_function
    # Here I want to access the same user object the association was called on
    # (that holds all already defined global variables), not a newly created object
    # through self.user (where all global variables are reset).

    proxy_association.owner
  end
end

如何从该关联中访问调用该关联的对象？不幸的是，self.user返回一个新对象，其中所有先前设置的变量都返回到默认值。

Answer 1

在 has_many 关联上使用 :inverse_of 选项。这将在使用关联时连接内存中的两个模型。

class User < ActiveRecord:Base
  has_many :accounts, inverse_of: :user
end

来源: http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html#method-i-has_many