嵌入式mongoid文件未標記爲髒/不更新

Question

我有一個數據模型如下

• 出價已與放置在出價User相關
• 出價可以是一個offer或listing在單一Product
• 一個Product可能有多重優惠和上市（獨立）發佈的由多個用戶
• 用戶可以將報價和上市多Products

產品< ---投標--->用戶

鑑於現有p從Product模型，操作就像p.offers << bid其中bid是Bid類的新實例不標記p爲「髒」，並更改不會保存到數據庫

產品類

class Product 
    include Mongoid::Document 
    ... 
    embeds_many :offers, class_name: 'Bid' 
    embeds_many :listings, class_name: 'Bid' 
end 

Bid類

class Bid 
    include Mongoid::Document 
    belongs_to :user 
    belongs_to :product 

    field :amount, type: Money 
    field :timestamp, type: DateTime, default: ->{ Time.now } 
end 

此外，還可通過bid.save!或創建一個新的數組p.offers = Array.new [bid]似乎不工作，要麼

Answer 1

更新時間：

你的模型結構應該是

class Product 
    include Mongoid::Document 
    ... 
    has_many :offers, class_name: 'Bid', :inverse_of => :offers_bid 
    has_many :listings, class_name: 'Bid', :inverse_of => :listings_bid 
end 

class Bid 
    include Mongoid::Document 
    belongs_to :offers_bid, :class_name => 'Product', :inverse_of => :offers 
    belongs_to :listings_bid, :class_name => 'Product', :inverse_of => :listings 
    belongs_to :user 

    field :amount, type: Money 
    field :timestamp, type: DateTime, default: ->{ Time.now } 
end