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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 Gem 吗？
`require': No such file to load -- test_helper (LoadError)
以下是完整的代码轨迹:
/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>'
最佳答案
您在 app/controllers 目录中有一个测试，quarterly_export_statement_test.rb。
在生产中，Rails 急切地加载所有类，因此它会尝试加载您的测试。您的测试确实需要'test_helper'。包含 test_helper 的 test 目录不在生产环境的加载路径中(很好!)，因此 require 失败。
要解决此问题，请将测试移动到它所属的 test 目录，该目录似乎是 /home/nyros/Documents/Projects/DFL/Working/DFL/test.
关于ruby-on-rails - `require' : No such file to load -- test_helper (LoadError)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35129533/
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