Rails - 为什么 RAILS_ROOT/lib 中的模型在生产模式下不可用? [英] Rails - why would a model inside RAILS_ROOT/lib not be available in production mode?

问题描述

我在 RAILS_ROOT/lib 文件夹中有一个类，我在我的一个助手中使用它，它在开发中效果很好.

I have a class located inside RAILS_ROOT/lib folder, which I use in one of my helpers, and it works great in development.

当我切换到生产时，应用程序抛出一个 NameError(未初始化的常量 SomeHelper::SomeClass)，我必须在帮助器中手动加载它:

When I switch to production, the application throws a NameError (uninitialized constant SomeHelper::SomeClass), and I have to load it manually in the helper:

load "#{Rails.root}/lib/some_class.rb"

module SomeHelper
  def some_method
    sc = SomeClass.new
    # blah
  end
end

我的印象是 RAILS_ROOT/lib/* 中的所有内容都应该对应用程序可用 - 我需要配置什么才能在生产模式下实现这一点吗?谢谢.

I was under the impression that everything inside RAILS_ROOT/lib/* should be available all to the app - is there anything I need to configure to make this happen in prod mode? thanks.

推荐答案

您可能需要检查开发环境和生产环境之间的配置设置之间的差异:config/environments/production.rb 和 config/environments/development.rb.

You might need to check differences between the configuration settings between development and production environment: config/environments/production.rb and config/environments/development.rb.

在 Rails 初始化例程中，会调用 load_plugins() 来加载 config.plugin_paths 中的所有插件.您需要确保包含您的文件夹 lib/，如

During the Rails initialization routine, load_plugins() is called which loads all plugins in config.plugin_paths. You need to make sure that your folder lib/ is included, like in

config.plugin_paths = ["#{RAILS_ROOT}/lib/plugins", "#{RAILS_ROOT}/vendor/plugins"]

config.plugin_paths = ["#{RAILS_ROOT}/lib/plugins", "#{RAILS_ROOT}/vendor/plugins"]

除了config.plugin_paths，您还可以在config.plugins 中命名应该加载的插件.如果该变量包含 :all，则将加载所有插件(找到).

In addition to config.plugin_paths, you can also name the plugins that should be loaded in config.plugins. If that variable contains :all then all plugins (found) will be loaded.

(顺便说一句:与任一环境相同的配置设置应该放在 config/environment.rb 中.环境之间的任何差异都是由于相应的 .rb 中的设置造成的文件.)

(By the way: configuration settings equal to either environment should go in config/environment.rb. Any differences between enviroments are due to settings in the respective .rb files.)

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