Question

我在开发Rails应用程序时使用tail -f来显示日志文件。它显示了日志消息（颜色！:)，这很棒。

但是在80宽度控制台中有如此多的信息，当我点击按钮获取资源时，很难跟踪某个“设置”日志消息的开始位置。

如果在每条日志消息/行的开头有行号或甚至是时间戳，会更容易。这样我就记得我需要开始查看“行号2365”或“2010/10/10 23：33：23：45之后”的日志。

这可能吗？是否有一些Rails内部选项？

Answer 1

为什么不编辑所需环境的日志标记

development.rb

config.log_tags [ lambda {|r| DateTime.now } ]

Answer 2

如果你想获得时间戳：

class ApplicationController < ActionController::Base
  # ...
  before_filter :log_tracker

  def log_tracker
    Rails.logger.add(1, "Log Date: #{DateTime.now}")
  end
end

然后根据您认为合适的日期格式化....

这可以用于Rails 2.1 +，之前您可以使用常量访问ActiveSupport::Buffered日志对象：RAILS_DEFAULT_LOGGER

使用Rails.logger.instance_values["log"]

访问实际日志文件

获取行数很困难，因为记录器只打开文件进行写入，可能是为了经济。我尝试时得到IOError: not opened for reading。 `

Answer 3

谢谢@scaney。

我找到了解决方案here。

我修改了代码以添加我自己的着色高亮（当然只用于开发！）现在我可以在控制台中看到黄色的“参数”之类的东西，我现在非常高兴！

如果有人感兴趣，这是我在environment.rb末尾的代码。这是我目前的（脏）实现。可能会在以后解决这个问题（也许可以制作一个宝石，但是现在这对我很好）

警告

DIRTY CODE跟随！使用风险自负！

module ActiveSupport class BufferedLogger #define the ANSI escape codes for normal and bright colors $my_my_ansi_colors = { :normal => "\x1B[0m", :black => "\x1B[30m", :red => "\x1B[31m", #red :green => "\x1B[32m", :yellow => "\x1B[33m", :blue => "\x1B[34m", :magenta => "\x1B[35m", :cyan => "\x1B[36m", :white => "\x1B[37m", :bred => "\x1B[1m\x1B[31m", #bright red :bgreen => "\x1B[1m\x1B[32m", :byellow => "\x1B[1m\x1B[33m", :bblue => "\x1B[1m\x1B[34m", :bmagenta => "\x1B[1m\x1B[35m", :bcyan => "\x1B[1m\x1B[36m", :bwhite => "\x1B[1m\x1B[37m", } #take a string and using the keys in the hash, replace the keys in the #string but surround the keys with ANSI color codes #No idea how to retain the case of the key!(TODO someday) def my_highlight msgx,hash return msgx if msgx.blank? return msgx if hash.empty? hash.each_pair do |k,v| if not k.nil? msgx.gsub! Regexp.new(k, Regexp::IGNORECASE), $my_my_ansi_colors[:normal]+$my_my_ansi_colors[v]+k.upcase+$my_my_ansi_colors[:normal] end end msgx end def add(severity, message = nil, progname = nil, &block) return if @level > severity message = (message || (block && block.call) || progname).to_s #INSERT BEGINS if not $myownglobalnumbercounter.nil? $myownglobalnumbercounter += 1 else $myownglobalnumbercounter = 1 end level = { 0 => "DEBUG", 1 => "INFO", 2 => "WARN", 3 => "ERROR", 4 => "FATAL" }[severity] || "U" message = "\x1B[0m[%d %s] : %s" % [$myownglobalnumbercounter,level,message] message = my_highlight message, { "debug" => :white, "error" => :bred, "info" => :bwhite, "warning" => :byellow, "warn" => :byellow , "parameters" => :byellow, "#" => :bgreen, "ms " => :bmagenta, "GET " => :bmagenta, "PUT " => :bmagenta, "POST " => :bmagenta, "DELETE " => :bmagenta } #INSERT ENDS message = "#{message}\n" unless message[-1] == ?\n buffer << message auto_flush message end end end

如何让Rails添加行号/时间戳来记录消息？

3 个答案:

development.rb