这是我对 Rails 中的跟踪痕迹的烦恼——它们首先打印错误,这意味着要查看任何错误,您必须在 termanl 中向上滚动以查看错误是什么。
有没有一种方法可以以相反的顺序打印错误和跟踪跟踪,以便您无需滚动即可查看错误。例如:
这是rails/ruby 当前打印的stracktrace:
/activesupport/lib/active_support/dependencies.rb:228:in `require': cannot load such file -- pry (LoadError)
from /activesupport/lib/active_support/dependencies.rb:228:in `block in require'
from /activesupport/lib/active_support/dependencies.rb:213:in `load_dependency'
from /activesupport/lib/active_support/dependencies.rb:228:in `require'
from /actionpack/lib/action_dispatch/routing/mapper.rb:307:in `normalize_path'
from /actionpack/lib/action_dispatch/routing/mapper.rb:79:in `normalize_path!'
from /actionpack/lib/action_dispatch/routing/mapper.rb:65:in `initialize'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1429:in `new'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1429:in `add_route'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1408:in `decomposed_match'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1389:in `block in match'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1380:in `each'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1380:in `match'
from /actionpack/lib/action_dispatch/routing/mapper.rb:502:in `mount'
from /ruby-2.0.0-p0/bundler/gems/sprockets-rails-bbf755e8b3aa/lib/sprockets/railtie.rb:125:in `block (2 levels) in <class:Railtie>'
from /actionpack/lib/action_dispatch/routing/route_set.rb:315:in `instance_exec'
from /actionpack/lib/action_dispatch/routing/route_set.rb:315:in `eval_block'
from /actionpack/lib/action_dispatch/routing/route_set.rb:330:in `block in clear!'
from /actionpack/lib/action_dispatch/routing/route_set.rb:330:in `each'
from /actionpack/lib/action_dispatch/routing/route_set.rb:330:in `clear!'
from /railties/lib/rails/application/routes_reloader.rb:35:in `block in clear!'
from /railties/lib/rails/application/routes_reloader.rb:33:in `each'
from /railties/lib/rails/application/routes_reloader.rb:33:in `clear!'
from /railties/lib/rails/application/routes_reloader.rb:15:in `reload!'
from /railties/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /activesupport/lib/active_support/file_update_checker.rb:75:in `call'
from /activesupport/lib/active_support/file_update_checker.rb:75:in `execute'
from /railties/lib/rails/application/routes_reloader.rb:27:in `updater'
from /railties/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
from /railties/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
from /railties/lib/rails/initializable.rb:30:in `instance_exec'
from /railties/lib/rails/initializable.rb:30:in `run'
from /railties/lib/rails/initializable.rb:55:in `block in run_initializers'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:180:in `each'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
from /railties/lib/rails/initializable.rb:54:in `run_initializers'
from /railties/lib/rails/application.rb:214:in `initialize!'
from /railties/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /demo/config/environment.rb:5:in `<top (required)>'
from /demo/config.ru:3:in `require'
from /demo/config.ru:3:in `block in <main>'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
from /demo/config.ru:in `new'
from /demo/config.ru:in `<main>'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
from /railties/lib/rails/commands/server.rb:48:in `app'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
from /railties/lib/rails/commands/server.rb:75:in `start'
from /railties/lib/rails/commands.rb:80:in `block in <top (required)>'
from /railties/lib/rails/commands.rb:75:in `tap'
from /railties/lib/rails/commands.rb:75:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
有没有一种方法可以让我以相反的顺序获得相同的 stracktrace,这样我就不必每次收到错误时都滚动终端。与此类似的东西:
from bin/rails:4:in `<main>'
from bin/rails:4:in `require'
from /railties/lib/rails/commands.rb:75:in `<top (required)>'
from /railties/lib/rails/commands.rb:75:in `tap'
from /railties/lib/rails/commands.rb:80:in `block in <top (required)>'
from /railties/lib/rails/commands/server.rb:75:in `start'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
from /railties/lib/rails/commands/server.rb:48:in `app'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
from /demo/config.ru:in `<main>'
from /demo/config.ru:in `new'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
from /ruby-2.0.0-p0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
from /demo/config.ru:3:in `block in <main>'
from /demo/config.ru:3:in `require'
from /demo/config/environment.rb:5:in `<top (required)>'
from /railties/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /railties/lib/rails/application.rb:214:in `initialize!'
from /railties/lib/rails/initializable.rb:54:in `run_initializers'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:180:in `each'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
from ruby-2.0.0-p0/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
from /railties/lib/rails/initializable.rb:55:in `block in run_initializers'
from /railties/lib/rails/initializable.rb:30:in `run'
from /railties/lib/rails/initializable.rb:30:in `instance_exec'
from /railties/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
from /railties/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
from /railties/lib/rails/application/routes_reloader.rb:27:in `updater'
from /activesupport/lib/active_support/file_update_checker.rb:75:in `execute'
from /activesupport/lib/active_support/file_update_checker.rb:75:in `call'
from /railties/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /railties/lib/rails/application/routes_reloader.rb:15:in `reload!'
from /railties/lib/rails/application/routes_reloader.rb:33:in `clear!'
from /railties/lib/rails/application/routes_reloader.rb:33:in `each'
from /railties/lib/rails/application/routes_reloader.rb:35:in `block in clear!'
from /actionpack/lib/action_dispatch/routing/route_set.rb:330:in `clear!'
from /actionpack/lib/action_dispatch/routing/route_set.rb:330:in `each'
from /actionpack/lib/action_dispatch/routing/route_set.rb:330:in `block in clear!'
from /actionpack/lib/action_dispatch/routing/route_set.rb:315:in `eval_block'
from /actionpack/lib/action_dispatch/routing/route_set.rb:315:in `instance_exec'
from /ruby-2.0.0-p0/bundler/gems/sprockets-rails-bbf755e8b3aa/lib/sprockets/railtie.rb:125:in `block (2 levels) in <class:Railtie>'
from /actionpack/lib/action_dispatch/routing/mapper.rb:502:in `mount'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1380:in `match'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1380:in `each'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1389:in `block in match'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1408:in `decomposed_match'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1429:in `add_route'
from /actionpack/lib/action_dispatch/routing/mapper.rb:1429:in `new'
from /actionpack/lib/action_dispatch/routing/mapper.rb:65:in `initialize'
from /actionpack/lib/action_dispatch/routing/mapper.rb:79:in `normalize_path!'
from /actionpack/lib/action_dispatch/routing/mapper.rb:307:in `normalize_path'
from /activesupport/lib/active_support/dependencies.rb:228:in `require'
from /activesupport/lib/active_support/dependencies.rb:213:in `load_dependency'
from /activesupport/lib/active_support/dependencies.rb:228:in `block in require'
/activesupport/lib/active_support/dependencies.rb:228:in `require': cannot load such file -- pry (LoadError)
可能吗?
最佳答案
有多种方法可以做到这一点。
如果您在 irb 或调试器中,例如:
caller.reverse
会给你你想要的。 另一种选择是像这样包装所有代码
begin
all the code
rescue StandardError => e
puts e.backtrace.reverse
end
最后,您可以扩展 Exception 上的回溯以打印 caller.reverse,但扩展核心模块根本不是一个好主意。
关于ruby-on-rails - 在屏幕上以相反的顺序打印 ruby on Rails backstraces/stracktraces/errorss,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/16201338/