Rails引擎的模型关系Rails Gem [英] Rails Gem with model-relationships for Rails Engines

问题描述

我只是开发一个Rails应用程序，它将包含许多引擎。
然而，我无法编辑引擎内部的关系。

为了解决这个问题，我想创建一个关系-Gem，它将被包含在应用程序中并定义关系（请参阅： https://stackoverflow.com/a/11835899/603126 ）。

假设我有一个User（名称空间隔离）引擎和一个Comment（名称空间隔离）引擎。
我想要的是重写/扩展关系中的关系-Gem，它将分享关系。

所以我添加了一个文件/ app / models / comment.rb与这些行（关系 - 宝石）：

  class Comment< CommentEngine :: Comment 
 belongs_to：user 
 end 
 
 class User< UserEngine :: User 
 has_many：comments 
 end 
  

如果我运行我的rails申请，关系不会建立。

我错过了什么？
如何实现这一点？

非常感谢您提前

解决方案
，所以我找到了一个解决方案。

你可以用装饰器猴子修改你的引擎（你需要把它放到config / initializers / initializer_name.rb中）

参见：在Rails中扩展ruby宝石

不知道这是否是件好事，但它的工作原理类似于魅力......

缺点是每次更改猴子补丁时都必须重新启动服务器......

编辑：看来这个猴子补丁会在收到几个请求后被垃圾回收。

编辑2：
这个后帮我出
如何在Ra中获取自动加载的猴子补丁代码ils？
您需要添加轻量级的Intializer以强制Rails为每个请求重新加载您的修补程序

  Rails.configuration.to_prepare do 
  

I'm just developing a Rails application which will have many Engines. However, I'm not able to edit relationships inside the Engines.

To solve this issue, I want to create a relationships-Gem which will be included in the Application and defines the relationships (see: https://stackoverflow.com/a/11835899/603126).

Let's assume, I have a User (namespaced and isolated) Engine and a Comment (namespaced and isolated) Engine. What I want is to override / extend the relationships inside the relationships-Gem which will share the relationships.

So I added a file /app/models/comment.rb with these lines (to the relationships-Gem):

class Comment < CommentEngine::Comment
  belongs_to :user
end

class User < UserEngine::User
  has_many :comments
end

If I run my rails application, the relationships won't be established.

What am I missing? How can this be achieved?

Thank you very much in advance

解决方案

Ok, so I've found a solution for that.

You can just monkey-patch your Engine with Decorators (you need to put it into config/initializers/initializer_name.rb)

see: Extending a ruby gem in Rails

Don't know if this is a good thing, but it works like a charm...

The downside is that you have to restart the server every single time you make a change to the monkey-patching...

EDIT: It seems that this monkey-patch will be garbage collected after a few requests.

EDIT 2: This post helped me out How to monkey-patch code that gets auto-loaded in Rails? you need to add thin sin your Intializer to force rails to reload your patch for every request

Rails.configuration.to_prepare do

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