如何修补在 Rails 中自动加载的代码? [英] How to monkey-patch code that gets auto-loaded in Rails?

问题描述

我正在使用以下内容修补 Rails 引擎:

I'm monkey-patching a Rails engine with something like:

SomeClass.class_eval do
  # ...
end

我第一次访问网站时，至少在开发模式下，它可以工作，但第二次就好像我的补丁从未存在过一样.我认为它是 Rails 自动重新加载引擎(安装在 vendor/中)而不是重新加载我的代码.这是 Rails 2.3.

The first time I hit the web site, on development mode at least, it works, but the second time it's like my patch never existed. I presume it's Rails auto-reloading the engine (which is installed in vendor/) and not reloading my code. This is Rails 2.3.

有什么想法可以让我的代码也重新加载吗?

Any ideas how to do it so that my code also gets reloaded?

推荐答案

此解决方案仅适用于 Rails 3+，因为它依赖于 Rails::Railtie 中的某些功能.将此代码放在初始化程序中.

This solution only works for Rails 3+ since it's dependent on some functionality in Rails::Railtie. Put this code in an initializer.

这个问题很老了，但我找到了一个解决方案:

This question is quite old, but here's a solution I found:

Rails.configuration.to_prepare do
  SomeClass.class_eval do
    # ...
  end
end

这会强制 Rails 在开发模式下对每个请求重新加载类，但在生产模式中只加载一次.

This forces Rails to reload the class on every request in development mode, but only once in production.

这篇关于如何修补在 Rails 中自动加载的代码?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！