Question

在我的routes.rb文件中，我有这段代码：

if Rails.env.development?
  mount LetterOpenerWeb::Engine, at: "/letter_opener"
end

因为在开发模式下，我们希望letter_opener为我们打开电子邮件。但是当我推送到heroku时，我得到了这个（下面）。为什么是这样？为什么heroku忽略了我的routes.rb中的这一部分？

感谢任何可以提供帮助的人！

捆绑完成（23.08s）清理捆绑缓存。 -----＆GT;为Rails资产管道准备应用程序正在运行：rake assets：预编译耙子流产了！ NameError：未初始化的常量LetterOpenerWeb /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/config/routes.rb:43:in block in <top (required)>' /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.2/lib/action_dispatch/routing/route_set.rb:337:in instance_exec＆＃39; /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.2/lib/action_dispatch/routing/route_set.rb:337:in eval_block' /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/actionpack-4.1.2/lib/action_dispatch/routing/route_set.rb:315:in绘制＆＃39; /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/config/routes.rb:1:in load_paths中的<top (required)>' /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/application/routes_reloader.rb:40:in阻止＆＃39; /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/application/routes_reloader.rb:40:in each' /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/application/routes_reloader.rb:40:in load_paths＆＃39; /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/application/routes_reloader.rb:16:in reload!' /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/application/routes_reloader.rb:26:in阻止更新程序＆＃39; /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.2/lib/active_support/file_update_checker.rb:75:in call' /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/activesupport-4.1.2/lib/active_support/file_update_checker.rb:75:in执行＆＃39; /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/application/routes_reloader.rb:27:in updater' /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/application/routes_reloader.rb:7:in execute_if_updated＆＃39; /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/application/finisher.rb:71:in block in <module:Finisher>' /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/initializable.rb:30:in instance_exec＆＃39; /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/initializable.rb:30:in run_initializers中的run' /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/initializable.rb:55:in阻止＆＃39; /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/initializable.rb:54:in run_initializers' /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/application.rb:300:in初始化＆＃39！; /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/config/environment.rb:5:in <top (required)>' /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/application.rb:276:in require_environment＆＃39！; /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/railties-4.1.2/lib/rails/application.rb:379:in block in run_tasks_blocks' /tmp/build_91bf7616fa162d43a8d71e23aeee1e99/vendor/bundle/ruby/2.1.0/gems/sprockets-rails-2.1.3/lib/sprockets/rails/task.rb:55:in阻止（2级）定义＆＃39; 任务：TOP =＆gt;环境（通过使用--trace运行任务查看完整跟踪）！！预编译资产失败。

Answer 1

我相信你必须指定你的运行时环境，在这种情况下你想要ENV =生产（根据上面输出中的请求表明＆＃34; require_environment！＆＃34;）。我不知道您正在运行哪个命令/任务会导致此错误，但请尝试将上述环境变量设置为＆＃39; production。＆＃39; （我不记得你是否需要关于单词制作的引用。）

Answer 2

我在rake任务中有一行，强制任务仅在开发模式下运行。但是这一行超出了rake任务的范围，因此它影响了整个应用程序。

为什么heroku在我的路由文件中运行这个代码只能在开发模式下运行？

2 个答案: