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`require ': there is no such file to load - test_helper (LoadError)

I get the following error when starting a Rails application in production mode, but when I launch my application in development mode, it works fine. Can I use any gems in working mode?

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

The following is a complete code trace:

  /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>'
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2 answers

You have the quarterly_export_statement_test.rb test in the app/controllers directory.

Rails loads all classes impatiently during production, so it tries to load your test. Your test require 'test_helper' . The test directory containing test_helper is not in the boot path in the production environment (good!), So the request is not executed.

To fix the problem, move the test to the test directory where it belongs, which looks like /home/nyros/Documents/Projects/DFL/Working/DFL/test .

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I have the same error when using: railstutorial.org Chapter 6. The offending file for me was app/helpers/application_helper_test.rb which had require 'test_helper' at the top.

I commented on this conclusion, made

 git add -A git push git push heroku

Then ran heroku run console , which worked :)

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