Mongoid删除嵌入式文档不会持续(Mongoid deleting embedded documents does not persist)

 我几个小时就遇到了一个问题，并且Google自己没有任何意义。 
 
 我有一个嵌入式文档的Mongoid模型，如下所示： 
 
embeds_many :tags, :as => :taggable
 
 出于某种原因，尝试删除此文档似乎在控制台中工作，但在重新加载之后文档会返回。 我已经尝试了以下内容： 
 
model.tags.delete_all

model.tags.each do |tag|
  tag.delete
end

model.tags.destroy_all
 
 完成上述所有操作后，我可以确认model.tags返回一个空数组。 然后为了安全起见，我甚至打电话给model.save。 如果我重新加载模型，所有嵌入的标签都会返回。 
 
 使用Mongoid删除嵌入文档的正确方法是什么？ 

I have been running into an issue for hours and have Googled myself senseless.
 
I have a Mongoid model with an embedded document, like so:
 
embeds_many :tags, :as => :taggable
 
For some reason, attempting to delete this document appears to work in the console but then the documents come back after a reload. I have tried the following:
 
model.tags.delete_all

model.tags.each do |tag|
  tag.delete
end

model.tags.destroy_all
 
After all of the above, I can confirm that model.tags returns an empty array. Then to be safe, I even call model.save. If I reload the model, all of the embedded tags come back.
 
What is the correct way to delete embedded documents using Mongoid?

原文：https://stackoverflow.com/questions/9972089