Question

跑步后 bundle exec rails s尝试通过http://localhost:3000/

访问该应用程序时遇到严重错误

要调试此错误，我需要查看错误跟踪的顶部，但是错误跟踪的长度将近5000项，并在3500行附近被切断。

如何查看完整错误，以便可以开始调试？

 4701 /Users/paul/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/puma-3.12.0/lib/puma/server.rb
 4702 /Users/paul/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/puma-3.12.0/lib/puma/runner.rb
 4703 /Users/paul/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/puma-3.12.0/lib/puma/cluster.rb
 4704 /Users/paul/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/puma-3.12.0/lib/puma/single.rb
 4705 /Users/paul/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/puma-3.12.0/lib/puma/launcher.rb
 4706 /Users/paul/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/puma-3.12.0/lib/puma/plugin/tmp_restart.rb
 4707 /Users/paul/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/faraday-0.12.1/lib/faraday/adapter/net_http_persistent.rb
 4708 /Users/paul/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/activesupport-5.1.1/lib/active_support/backtrace_cleaner.rb
 4709 /Users/paul/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/railties-5.1.1/lib/rails/backtrace_cleaner.rb
 4710 /Users/paul/.rbenv/versions/2.4.1/lib/ruby/gems/2.4.0/gems/web-console-3.5.1/lib/web_console/whiny_request.rb

[NOTE]
You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome.
For details: http://www.ruby-lang.org/bugreport.html

[IMPORTANT]
Don't forget to include the Crash Report log file under
DiagnosticReports directory in bug reports.

Answer 1

您可以将脚本的输出重定向到一个文件，并仔细查看错误内容。

bundle exec rails s > my_file

这会将输出放入文件“ my_file”中。如果要包括错误（stderr输出），则还需要将其重定向，因此如下所示：

bundle exec rails s > my_file 2>&1

如何在Rails Server错误中查看长堆栈跟踪的顶部

1 个答案: