如何通过yaml在log4r中创建自定义关卡

Question

我有一个使用yaml配置的log4r 1.1.10的Rails 4.1应用程序，一切正常。现在我只想添加一个自定义关卡。因此，在我的yaml文件的顶部，我在log4r_config后面添加了7行

log4r_config:
  pre_config:
    custom_levels:
      - INFO
      - WARN
      - ERROR
      - SERIOUS
      - FATAL
  # define all loggers ...
  loggers:

我的application.rb的相关部分如下所示：

require 'log4r'
require 'log4r/yamlconfigurator'
require File.join(File.dirname(__FILE__),"../lib/rollable_file_outputter.rb")
include Log4r
log4r_config = YAML.load_file(File.join(File.dirname(__FILE__),"log4r.yml"))
YamlConfigurator.decode_yaml( log4r_config['log4r_config'] )

但当我现在启动应用程序时，我会得到

ArgumentError: Log level must be in 0..7
/opt/thermyos.com/server/shared/bundle/ruby/2.0.0/gems/log4r-1.1.10/lib/log4r/yamlconfigurator.rb:189:in `decode_logger_common'
/opt/thermyos.com/server/shared/bundle/ruby/2.0.0/gems/log4r-1.1.10/lib/log4r/yamlconfigurator.rb:175:in `decode_logger'
/opt/thermyos.com/server/shared/bundle/ruby/2.0.0/gems/log4r-1.1.10/lib/log4r/yamlconfigurator.rb:69:in `block in decode_yaml'
/opt/thermyos.com/server/shared/bundle/ruby/2.0.0/gems/log4r-1.1.10/lib/log4r/yamlconfigurator.rb:69:in `each'
/opt/thermyos.com/server/shared/bundle/ruby/2.0.0/gems/log4r-1.1.10/lib/log4r/yamlconfigurator.rb:69:in `decode_yaml'
/opt/thermyos.com/server/releases/20141209152838/config/application.rb:23:in `<top (required)>'

在yaml中定义自定义log4r级别的正确方式是什么？

Answer 1

解决方案是永远不要遗漏调试级别。这只是我的疏忽。由于Log4r使用调试级别来编写调试消息，因此将其省略是非常糟糕的。