Dockerized Rails 5 RC1应用程序未获取开发中控制器和模型的更新 [英] Dockerized Rails 5 RC1 application not picking up updates to controllers and models in development

问题描述

我在Mac OS X + Docker Machine + Docker Compose上开发Rails 4应用程序方面有相当丰富的经验，但是Rails 5在开发环境中缓存文件的方式已经发生了一些变化（当前正在使用RC1进行测试）。

I have quite a bit of experience developing Rails 4 apps on Mac OS X + Docker Machine + Docker Compose, but something has changed with how Rails 5 is caching files in the development environment (currently testing with RC1).

使用 docker-compose up 启动应用程序后，该应用程序将在开发模式下正常运行。

After starting the application with docker-compose up, the application runs normally in development mode.

但是，如果我对控制器或模型进行了更改，则使它反映在应用程序中的唯一方法是停止服务器并重新启动它。

But if I make a change to a controller or model, the only way I can get that reflected in the application is to stop the server and start it back up.

现在，当我需要更改控制器或模型时，我的工作流程如下所示：

So now my workflow looks something like this when I need to make a change to a controller or model:

1. 更改控制器/模型类。


2. 使用 Ctrl + C 停止服务器。


3. 使用 docker-compose up 启动服务器备份。


4. 在服务器上等待启动。


5. 运行我在浏览器中运行的任何内容。

1. Make change to controller/model class.
2. Stop server with Ctrl + C.
3. Start server back up with docker-compose up.
4. Wait on the server to start up.
5. Run whatever I was running in the browser.

至少可以说，需要要做步骤2-4很烦人，而不是我习惯于Rails 4。

To say the least, needing to do steps 2-4 is annoying and not what I'm accustomed to from Rails 4.

我走了一步，并使用删除说明，但我仍然得到相同的行为。

I went a step further and uninstalled Spring using the Removal instructions, but I still get the same behavior.

我还搜索了我在 config / environments / development.rb 中可以找到的与Rails运行时对模型和控制器类的控制权有关的任何设置，而我无法什么也找不到。 （我认为它真的是要依靠观察文件系统来有选择地加载更改，并且从Mac更改为VirtualBox并没有得到什么。）

I also searched for any settings that I could find in config/environments/development.rb related to the Rails runtime's iron grip on the model and controller classes, and I couldn't find anything. (I assume that it really wants to rely on watching the filesystem in order to selectively load changes, and something isn't being picked up from a change on Mac to VirtualBox.)

关于我可以尝试的其他想法？还是有任何与这种更积极的缓存如何工作相关的新设置？

Any other ideas on what I can try? Or are there any new settings related to how this more aggressive caching works?

推荐答案

我正在使用Rails 5 rc1。

I'm Using Rails 5 rc1.

Rails 5对代码重装进行了一些改进，但似乎不适用于OS X上的Docker。

Rails 5 introduced some "improvements" to code reloading, but it doesn’t seem to work with Docker on OS X.

因此在 config / environments / development.rb 中，我替换了

config.file_watcher = ActiveSupport::EventedFileUpdateChecker

with

config.file_watcher = ActiveSupport::FileUpdateChecker

对于ActiveSupport :: EventedFileUpdateChecker文件监视程序，似乎不会对docker计算机共享文件发生更改事件

It seems that for the ActiveSupport::EventedFileUpdateChecker file watcher, the change event does not occur for docker-machine shared files

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