Ruby-on-rails 在 rails 3 中设置记录器
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Setting up the logger in rails 3
提问by John Baker
I'm trying to figure out how to use the logger with rails 3. I need to log to a file not have it in the console, but I just can't figure out how to set it up and then, how to write something to that log. I tried the rails docs but they didn't really make it clear.
我正在尝试弄清楚如何将记录器与 rails 3 一起使用。我需要登录到控制台中没有的文件，但我就是不知道如何设置它，然后，如何写一些东西到那个日志。我尝试了 rails 文档，但他们并没有真正说清楚。
回答by Dylan Markow
By default, Rails should be logging to an environment-specific log file in your project's logdirectory. It will be called either test.log, development.log, or production.logdepending on which environment you're running in.
默认情况下，Rails 应该记录到项目log目录中特定于环境的日志文件。将要么叫test.log，development.log或production.log取决于你正在运行的环境。
You can log directly to Rails' logger using the Rails.loggerobject:
您可以使用Rails.logger对象直接登录到 Rails 的记录器：
Rails.logger.info "My info message"
Rails.logger.debug "My debugging message"
Rails.logger.warn "My warning message"
Rails used to use Ruby's standard logging class, but it now uses ActiveSupport::BufferedLogger. (The official Ruby on Rails Guidesare incorrect when they say "Rails makes use of Ruby's standard logger to write log information").
Rails 过去使用Ruby 的标准日志记录类，但现在使用ActiveSupport::BufferedLogger. （Ruby on Rails官方指南说“Rails 使用 Ruby 的标准记录器来写入日志信息”是不正确的）。
