`require': 没有要加载的文件 -- test_helper (LoadError)答案

【问题标题】：`require': No such file to load -- test_helper (LoadError)`require': 没有要加载的文件 -- test_helper (LoadError)
【发布时间】：2016-05-09 20:17:06
【问题描述】：

当我在生产模式下运行我的 Rails 应用程序时出现以下错误，但是当我在开发模式下运行我的应用程序时它工作正常。我可以在生产模式下使用任何宝石吗？

`require': No such file to load -- test_helper (LoadError)

以下是完整的代码跟踪：

 /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `require': No such file to load -- test_helper (LoadError)
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `block in require'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:214:in `load_dependency'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `require'
from /home/nyros/Documents/Projects/DFL/Working/DFL/app/controllers/quarterly_export_statement_test.rb:1:in `<top (required)>'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `require'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `block in require'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:214:in `load_dependency'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `require'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:330:in `require_or_load'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:289:in `depend_on'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:207:in `require_dependency'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/engine.rb:465:in `block (2 levels) in eager_load!'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/engine.rb:464:in `each'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/engine.rb:464:in `block in eager_load!'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/engine.rb:462:in `each'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/engine.rb:462:in `eager_load!'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/engine.rb:347:in `eager_load!'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/application/finisher.rb:56:in `each'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/application/finisher.rb:56:in `block in <module:Finisher>'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/initializable.rb:30:in `instance_exec'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/initializable.rb:30:in `run'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/initializable.rb:55:in `block in run_initializers'  
from /home/nyros/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/tsort.rb:345:in `each'
from /home/nyros/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/tsort.rb:345:in `call'
from /home/nyros/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/tsort.rb:345:in `each_strongly_connected_component'
from /home/nyros/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/tsort.rb:224:in `tsort_each'
from /home/nyros/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/tsort.rb:203:in `tsort_each'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/initializable.rb:54:in `run_initializers'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/application.rb:215:in `initialize!'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /home/nyros/Documents/Projects/DFL/Working/DFL/config/environment.rb:5:in `<top (required)>'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `require'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `block in require'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:214:in `load_dependency'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `require'
from /home/nyros/Documents/Projects/DFL/Working/DFL/config.ru:3:in `block in <main>'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/rack-1.5.5/lib/rack/builder.rb:55:in `instance_eval'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/rack-1.5.5/lib/rack/builder.rb:55:in `initialize'
from /home/nyros/Documents/Projects/DFL/Working/DFL/config.ru:in `new'
from /home/nyros/Documents/Projects/DFL/Working/DFL/config.ru:in `<main>'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/rack-1.5.5/lib/rack/builder.rb:49:in `eval'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/rack-1.5.5/lib/rack/builder.rb:49:in `new_from_string'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/rack-1.5.5/lib/rack/builder.rb:40:in `parse_file'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/rack-1.5.5/lib/rack/server.rb:277:in `build_app_and_options_from_config'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/rack-1.5.5/lib/rack/server.rb:199:in `app'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/commands/server.rb:48:in `app'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/rack-1.5.5/lib/rack/server.rb:314:in `wrapped_app'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/commands/server.rb:75:in `start'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/commands.rb:76:in `block in <top (required)>'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/commands.rb:71:in `tap'
from /home/nyros/.rvm/gems/ruby-2.2.0@dfl/gems/railties-4.0.2/lib/rails/commands.rb:71:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'

【问题讨论】：

再分享几行堆栈跟踪
为什么要尝试在production 环境中加载test_helper？您在哪个文件中收到该错误？
您是否尝试在production 环境中运行测试？请发布回溯
不，我没有在生产环境中运行任何测试 --@Vasfed
请放完整的痕迹

标签： ruby-on-rails ruby ruby-on-rails-4 production-environment

【解决方案1】：

您的app/controllers 目录中有一个测试quarterly_export_statement_test.rb。

在生产环境中，Rails 会急切地加载所有类，因此它会尝试加载您的测试。您的测试执行require 'test_helper'。包含test_helper 的test 目录不在生产环境中的加载路径中（很好！），因此 require 失败。

要解决此问题，请将测试移至其所属的test 目录，该目录似乎是/home/nyros/Documents/Projects/DFL/Working/DFL/test。

【讨论】：

我有点被引擎路径部分迷住了，但在 OP 的情况下，你的答案 @dave 是正确的。一般来说，引擎不得低于 ./app，因为正如你所说，所有应用程序下的文件将在生产中急切地加载。

【解决方案2】：

我在使用时遇到了同样的错误：railstutorial.org 第 6 章。对我来说有问题的文件是app/helpers/application_helper_test.rb 顶部有require 'test_helper'。

我把那行注释掉了，没有

git add -A
git push
git push heroku

然后运行heroku run console，它成功了:)

【讨论】：

同一本书同一章节我也面临同样的问题6，你完全救了我兄弟！谢谢！我在主分支上检查了作者的 github，在 helpers 文件夹中没有 application_helper_test.rb 文件，我很好奇是什么导致了这个问题？ github.com/mhartl/sample_app_6th_ed/tree/main/app/helpers