Mongoid领域没有坚持

Question

所以我有一个非常简单的mongoid类：

class Offer 
    include Mongoid::Document 

    field :date, type: DateTime 
    field :accepted, type: Boolean 

    scope :accepted, where(accepted: true) 
    scope :denied, where(accepted: false) 

    belongs_to :from, class_name: 'User', inverse_of: :from_offers 
    belongs_to :to, class_name: 'User', inverse_of: :to_offers 
    belongs_to :update 
end 

然而，在创建之后，其字段都可以更新。如果我做了像offer.accepted = true，然后offer.save！之类的东西，则不会引发错误，但是一旦完成操作并刷新页面或改变页面就会恢复。我不知道如何继续。任何帮助？

更新：我的更新类不应该有offer_id字段吗？

=> #<Update _id: 4e6933836066250375000033, _type: nil, updated_at: 2011-09-08 21:28:44 UTC, type: "offer", unread: false, topic_id: nil, post_id: nil, user_id: BSON::ObjectId('4e692ad3606625123b000001'), profile_id: nil, commenter_id: BSON::ObjectId('4e692b0b606625037500002a')> 

UPDATE2：我在想这可能是has_one的一个bug。我已经恢复到只是将更新的ID存储在字符串字段中而不是has_one连接，并且一切看起来都很好。

Answer 1

这也被报告为GitHub issue。

我无法重现与Mongoid 2.2.0或2.2.0稳定的分支（从d6ace09c）的问题。

此代码：

class Offer 
    include Mongoid::Document 

    field :date, type: DateTime 
    field :accepted, type: Boolean 

    scope :accepted, where(accepted: true) 
    scope :denied, where(accepted: false) 

    belongs_to :from, class_name: 'User', inverse_of: :from_offers 
    belongs_to :to, class_name: 'User', inverse_of: :to_offers 
end 

class User 
    include Mongoid::Document 

    has_many :from_offers, :class_name => 'Offer', :inverse_of => :from 
    has_many :to_offers, :class_name => 'Offer', :inverse_of => :to 
end 

User.delete_all 
Offer.delete_all 

user1 = User.create 
user2 = User.create 
user3 = User.create 
puts "user1 ID = #{user1.id}" 
puts "user2 ID = #{user2.id}" 
puts "user3 ID = #{user3.id}" 

Offer.create(
    :date  => Date.today, 
    :accepted => false, 
    :from  => user1, 
    :to  => user2, 
) 

ap Offer.first.attributes 
Offer.first.update_attributes :accepted => true, :to => user3 
ap Offer.first.attributes 

生产的该输出，其示出了offer已成功更新：

user1 ID = 4e696a052b58af5dce000001 
user2 ID = 4e696a052b58af5dce000002 
user3 ID = 4e696a052b58af5dce000003 
{ 
     "_id" => BSON::ObjectId('4e696a052b58af5dce000004'), 
     "date" => 2011-09-08 04:00:00 UTC, 
    "accepted" => false, 
    "from_id" => BSON::ObjectId('4e696a052b58af5dce000001'), 
     "to_id" => BSON::ObjectId('4e696a052b58af5dce000002') 
} 
{ 
     "_id" => BSON::ObjectId('4e696a052b58af5dce000004'), 
     "date" => 2011-09-08 04:00:00 UTC, 
    "accepted" => true, 
    "from_id" => BSON::ObjectId('4e696a052b58af5dce000001'), 
     "to_id" => BSON::ObjectId('4e696a052b58af5dce000003') 
}