Question

大家好我在使用build

时遇到了问题

Bag
 belongs_to :creator, :class_name => "User"
 has_many :users, :through => :assignments

User
 has_many :bags, :through => :assignments

Assignment
 attr_accessible :bag_id, :user_id
 belongs_to :bag
 belongs_to :user

我只是想创建一个正确使用Bag来设置外键的current_user's id。但是一直在发生的是

Rails正确创建Bag但不是将Bag.creator_id设置为current_user.id，而是使用inserts和Assignments将bag's id条目设置为current_user's id。有人可以帮帮我吗？我知道了。

current_user.bags.build type: "Prada", price: 50
current_user.save

Answer 1

似乎User只知道通过assignments的行李，这就是为什么它正在使用它。如果你想跳过rel表，你真正需要的是creator等效的包：

User
 has_many :bags, :through => :assignments
 has_many :creations, :class_name => 'Bag'

bag = current_user.creations.build type: "Prada", price: 50
bag.save

Answer 2

我认为你的模型应该是这样的

Bag
 belongs_to :creator, :class_name => "User"
 has_many :assignments
 has_many :users, :through => :assignments

User
 has_many :assignments
 has_many :bags, :through => :assignments

Assignment
 belongs_to :bag
 belongs_to :user
 attr_accessible :bag_id, :user_id

尝试

bag = current_user.bags.build type: "Prada", price: 50
bag.save

或

current_user.bags.create type: "Prada", price: 50

使用与belongs_to一起使用的build：class_name

2 个答案: