如何让Rails 3在开发模式下重新加载STI类？

发布于 2024-10-10 09:32:00 字数 363 浏览 9 评论 0原文

切换到 Rails 3 后，我注意到我必须重新启动服务器才能使 STI 模型类随着每个请求而重新加载。例如，假设我有这样的情况：

# app/models/vehicle.rb
class Vehicle < ActiveRecord::Base
end

# app/models/car.rb
class Car < Vehicle
end

如果我对 Vehicle 进行更改，则该更改将在下一个请求时加载。但如果我对 Car 进行更改，我必须重新启动服务器才能加载它。

有解决这个问题的想法吗？

我正在运行 WEBrick，但我并不致力于它。

原文

After switching to Rails 3, I noticed that I have to reboot my server to make STI model classes reload with each request. For example, suppose I have this:

# app/models/vehicle.rb
class Vehicle < ActiveRecord::Base
end

# app/models/car.rb
class Car < Vehicle
end

If I make a change to Vehicle, the change is loaded on the next request. But if I make a change to Car, I have to reboot my server for it to load.

Any ideas on fixing this?

I'm running WEBrick, but I'm not committed to it.

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下雨或天晴 2024-10-17 09:32:00

我们发现我们需要 zetetic 的解决方案和一些额外的代码来完成这项工作（至少在 Rails 3.0.9 中）。对于上述问题，解决方案如下所示：

在 config/environments/development.rb 中：

  config.after_initialize do
    ["vehicle"].each do|dep|
      require_dependency( (Rails.root + "app/models/#{dep}").to_s )
    end
  end

在 app/controllers/application_controller.rb 中：

class ApplicationController < ActionController::Base
  if Rails.env == 'development'
    require_dependency( (Rails.root + "app/models/vehicle").to_s )
  end
...

development.rb 中的代码处理类的初始加载，ApplicationController 中的代码处理后续请求。

We found that we needed both zetetic's solution and some additional code to make this work (at least in Rails 3.0.9). For the above problem, the solution would look something like:

In config/environments/development.rb:

  config.after_initialize do
    ["vehicle"].each do|dep|
      require_dependency( (Rails.root + "app/models/#{dep}").to_s )
    end
  end

In app/controllers/application_controller.rb:

class ApplicationController < ActionController::Base
  if Rails.env == 'development'
    require_dependency( (Rails.root + "app/models/vehicle").to_s )
  end
...

The code in development.rb handles the initial loading of the class, and the code in ApplicationController handles subsequent requests.

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