Question

我有一个属于2个项目实例的ActiveRecord模型'offer'。物品属于用户。

优惠模式具有以下内容：

offered_item_id receiving_item_id offering_user_id receiving_user_id

在创建模型时，我希望Rails通过读取项目ID并通过该关系来保存用户。

我有这个：

class Offer < ActiveRecord::Base

  attr_accessible :offered_item_id, :receiving_item_id, :state

    belongs_to :offering_user, class_name: "User"
  belongs_to :receiving_user, class_name: "User"
  belongs_to :offered_item, class_name: "Item"
  belongs_to :receiving_item, class_name: "Item"

  before_save :populate_user_ids

  private
        def populate_user_ids
            self.receiving_user_id = self.receiving_item.user.id
            self.offering_user_id = self.offered_item.user.id
        end 

end

但即使对populate_user_ids方法中的值进行硬编码似乎也不起作用。我不确定before_save是否被召唤。

我的测试是通过项目关系传递的，但是用户关系失败了。

参见我的RSpec测试：

describe "relations" do
        it { should respond_to (:offering_user) }
        it { should respond_to (:offered_item) }
        it { should respond_to (:receiving_user) }
        it { should respond_to (:receiving_item) }
        its(:offering_user) { should == offering_user } #FAILS
        its(:offered_item) { should == offered_item }
        its(:receiving_user) { should == receiving_user } #FAILS
        its(:receiving_item) { should == receiving_item }
    end

道歉我对Rails很陌生。

可能是什么问题？

由于

Answer 1

啊，我是个笨拙的人。

我正在使用：

let!(:offer) { offered_item.offers_made_with.build(receiving_item_id: receiving_item.id) }

而不是：

let!(:offer) { offered_item.offers_made_with.create(receiving_item_id: receiving_item.id) }

build无法保存，create可以保存。

未调用Rails before_save

1 个答案: