回溯消音器不工作 [英] Backtrace Silencer not working

问题描述

在我的 Rails 应用程序中，我设置了以下回溯消音器，正如 Michael Hartl 在他的 Rails 教程中所建议的:

Rails.backtrace_cleaner.add_silencer { |line|行 =~/rvm/}

但我仍然得到了我打算过滤掉的所有噪音:

7:13:55 - INFO - 运行:test/controllers/tags_controller_test.rb开始错误[test_should_get_index"，标签控制器测试，0.45206]test_should_get_index#TagsControllerTest (0.45s)ActionController::UrlGenerationError:ActionController::UrlGenerationError: 没有路由匹配 {:action=>"index", :controller=>"tags"}/Users/chris/.rvm/gems/ruby-2.0.0-p353/gems/actionpack-4.1.6/lib/action_dispatch/journey/formatter.rb:39:in `generate'/Users/chris/.rvm/gems/ruby-2.0.0-p353/gems/actionpack-4.1.6/lib/action_dispatch/routing/route_set.rb:599:in`generate'

很明显，字符串rvm"出现在最后两行中.但他们仍然出现.将字符串更改为.rvm"没有任何区别.

解决方案

这是因为 https://github.com/vipulnsward/rails/blob/ecc8f283cfc1b002b5141c527a827e74b770f2f0/actionpack/lib/action_dispatch/lib/action_dispatch#16L5/alib.//p>

由于 application_trace 为空(这是因为错误不是来自用户代码而是路由错误)，我们将回退到 framework_trace，它不会对其进行过滤(它只过滤噪音).

您可以通过创建自己的 log_formatter 来解决它.在你的 development.rb 和/或 test.rb 添加

config.log_formatter = SilentLogger.newconfig.log_formatter.add_silencer { |行|行 =~/rvm/}

并在模型中创建简单的类，只需要call 方法.在那里您可以根据需要修改回溯.

class SilentLogger定义初始化@silencers = []结尾def add_silencer(&block)@消音器<<堵塞结尾def call(severity, timestamp, progname, msg)回溯 = (String === msg) ?"#{msg}\n" : "#{msg.inspect}\n"如果@silencers.empty 返回回溯?@silencers.each 做 |s|backtrace = backtrace.split("\n").delete_if { |line|s.call(line) }结尾backtrace.join("\n")结尾结尾

In my Rails app, I have set up the following backtrace silencer, as suggested by Michael Hartl in his Rails tutorial:

Rails.backtrace_cleaner.add_silencer { |line| line =~ /rvm/ }

But still I get all the noise I intended to filter out:

7:13:55 - INFO - Running: test/controllers/tags_controller_test.rb
Started

ERROR["test_should_get_index", TagsControllerTest, 0.45206]
test_should_get_index#TagsControllerTest (0.45s)
ActionController::UrlGenerationError:               
ActionController::UrlGenerationError: No route matches {:action=>"index", :controller=>"tags"}
        /Users/chris/.rvm/gems/ruby-2.0.0-p353/gems/actionpack-4.1.6/lib/action_dispatch/journey/formatter.rb:39:in `generate'
        /Users/chris/.rvm/gems/ruby-2.0.0-p353/gems/actionpack-4.1.6/lib/action_dispatch/routing/route_set.rb:599:in `generate'

Clearly the string "rvm" is present in the last two lines. But still they show up. Changing the string to ".rvm" didn't make any difference.

解决方案

This is because of https://github.com/vipulnsward/rails/blob/ecc8f283cfc1b002b5141c527a827e74b770f2f0/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb#L155-L156

Since application_trace is empty(This is because error is not from user code but route error), we are falling back to framework_trace, which does not filter it (it filters only noise).

You can solve it with creating your own log_formatter. In your development.rb and/or test.rb add

config.log_formatter = SilentLogger.new
config.log_formatter.add_silencer { |line| line =~ /rvm/ }

And create simple class in models with only method call required. There you can modify your backtrace as you wish.

class SilentLogger
  def initialize
    @silencers = []
  end

  def add_silencer(&block)
    @silencers << block
  end

  def call(severity, timestamp, progname, msg)
    backtrace = (String === msg) ? "#{msg}\n" : "#{msg.inspect}\n"

    return backtrace if @silencers.empty?

    @silencers.each do |s|
      backtrace = backtrace.split("\n").delete_if { |line| s.call(line) }
    end

    backtrace.join("\n")
  end
end

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