MongoDB 中引用的奇怪行为
我正在使用 Rails 3 和 Mongoid。
我有两个文档：
class MyUser
include Mongoid::Document
field ......
references_many :statuses, :class_name => "MyStatus"
end
class MyStatus
include Mongoid::Document
field ......
referenced_in :user, :class_name => "MyUser"
end
问题是，我可以获取任何给定状态的用户，但我无法获取用户的状态列表！
IE。
status = MyStatus.first
status.user # the output is correct here
user = MyUser.first
user.statuses # this one outputs [] instead of the list of statuses...
请告诉我我做错了什么？我刚接触 mongo 几天......
I am using Rails 3 with Mongoid.
I have two documents:
class MyUser
include Mongoid::Document
field ......
references_many :statuses, :class_name => "MyStatus"
end
class MyStatus
include Mongoid::Document
field ......
referenced_in :user, :class_name => "MyUser"
end
The problem is, I can get the user of any given status, but I cannot get the list of statuses from a user!
ie.
status = MyStatus.first
status.user # the output is correct here
user = MyUser.first
user.statuses # this one outputs [] instead of the list of statuses...
Please tell me what have I done wrong? I am just a few days with mongo......
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评论（1）
你的代码对我来说看起来是正确的。
您确定 MyStatus.first.user == MyUser.first 吗？
您的数据库中可能有多个用户..其中第一个用户没有状态，第二个用户的列表中有 status1 。
要测试这一点，请尝试执行以下操作：
Your code looks correct to me.
Are you sure that MyStatus.first.user == MyUser.first ?
It's possible that you have multiple users in your db.. where the first user has no statuses, and the second user has status1 in his list.
To test this, try doing: