Can't catch ActiveRecord::RecordNotFound with rescue
我是Ruby的新手，如果这是一个愚蠢的问题，或者如果我没有遵循最佳实践，请耐心等待。
我在使用
1 2 3 4 5 6 7 8 9 | begin event = Event.find(event_id) rescue ActiveRecord::RecordNotFound => e Rails.logger.debug"Event does not exist, id:" + event_id return { # return"unauthorized" to avoid testing existence of event id # (some redacted codes) } end |
但不知怎的，它没有被捕获(救援块中的日志没有打印)，整个程序只返回内部服务器错误。 这是堆栈跟踪：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | Completed 500 Internal Server Error in 22ms (ActiveRecord: 1.0ms) ActiveRecord::RecordNotFound (Couldn't find Event with 'id'=999): lib/sync/create_update_event_handler.rb:78:in `handleRequest' app/controllers/sync_controller.rb:36:in `block in sync' app/controllers/sync_controller.rb:31:in `each' app/controllers/sync_controller.rb:31:in `sync' Rendering /usr/local/rvm/gems/ruby-2.4.0/gems/actionpack-5.0.6/lib/action_dispatch/middleware/templates/rescues/diagnostics.html.erb within rescues/layout Rendering /usr/local/rvm/gems/ruby-2.4.0/gems/actionpack-5.0.6/lib/action_dispatch/middleware/templates/rescues/_source.html.erb Rendered /usr/local/rvm/gems/ruby-2.4.0/gems/actionpack-5.0.6/lib/action_dispatch/middleware/templates/rescues/_source.html.erb (6.4ms) Rendering /usr/local/rvm/gems/ruby-2.4.0/gems/actionpack-5.0.6/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb Rendered /usr/local/rvm/gems/ruby-2.4.0/gems/actionpack-5.0.6/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (2.3ms) Rendering /usr/local/rvm/gems/ruby-2.4.0/gems/actionpack-5.0.6/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb Rendered /usr/local/rvm/gems/ruby-2.4.0/gems/actionpack-5.0.6/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (1.9ms) Rendered /usr/local/rvm/gems/ruby-2.4.0/gems/actionpack-5.0.6/lib/action_dispatch/middleware/templates/rescues/diagnostics.html.erb within rescues/layout (36.6ms) |
我唯一能想到的是有两个不同的ActiveRecord :: RecordNotFound，我抓错了，但我不知道是否是这种情况或我如何验证它。
我做错了什么？
======================================
更新
问题在于救援块，我将
确实捕获了
原来错误信息是错误的。
问题是我将
但不知何故Rails打印出RecordNotFound异常。
通过替换解决了这个问题
<5233>
同
感谢@lacostenycoder将我的注意力集中在错误消息上。
如果你这样做，你不会得到错误
event = Event.find_by(id：event_id)
在这种情况下，如果ID无法找到记录，那么
在这种情况下，如果ID无法找到记录，那么
你粘贴的代码对我来说很好。如果您没有在日志中看到输出，请检查您的环境和日志级别设置INFO，WARN，DEBUG等.500错误表示某种控制器操作引发错误。
请参阅在Ruby on Rails中设置日志记录级别
为了确保您的救援块正在执行，请尝试执行除日志之外的操作。如果您正在运行开发服务器，可以尝试：
1 2 3 4 5 6 7 8 9 10 11 12 13 | begin event = Event.find(event_id) rescue ActiveRecord::RecordNotFound => e msg ="Event does not exist, id: #{event_id.to_s}" Rails.logger.debug msg. puts msg binding.pry # if you have gem 'pry' in your development gems. File.open('test.log', 'w') {|f| f.write msg} #check if this appears in root of your app return { # return"unauthorized" to avoid testing existence of event id # (some redacted codes) } end |
更新：我根据你的答案更改了字符串插值。你也可以在插值中调用