It appears that using ActiveRecord (which requires ActiveSupport) messes with the Logger class, resulting in difficulties in a non-Rails ActiveRecord-using project. This can be seen with some example code:
require 'rubygems' #require 'activerecord' require 'logger'
log = Logger.new(STDERR) log.sev_threshold = Logger::INFO log.datetime_format = "%Y-%m-%d %H:%M:%S"
log.debug "debug" log.info "info" log.warn "warn" log.error "error" log.fatal "fatal"
Running this code will produce this lovely output:
I, [2009-09-02 10:49:39#27562] INFO -- : info W, [2009-09-02 10:49:39#27562] WARN -- : warn E, [2009-09-02 10:49:39#27562] ERROR -- : error F, [2009-09-02 10:49:39#27562] FATAL -- : fatal
However, if I uncomment the require 'activerecord' line, I instead get this less beautiful output:
info warn error fatal
So I did some searching about and after looking at activesupport's logger.rb http://github.com/rails/rails/blob/669fd84910586d4c791b6f5bf4320f68ac7845aa/activesupport/lib/active_support/core_ext/logger.rb
I found the following "working solution"
log = Logger.new(STDERR) log.sev_threshold = Logger::INFO log.datetime_format = "%Y-%m-%d %H:%M:%S" class Formatter Format = "%s, [%s#%d] %5s -- %s: %s\n"
attr_accessor :datetime_format
def initialize @datetime_format = nil end
def call(severity, time, progname, msg) Format % [severity[0..0], format_datetime(time), $$, severity, progname, msg2str(msg)] end
private def format_datetime(time) if @datetime_format.nil? time.strftime("%Y-%m-%dT%H:%M:%S.") << "%06d " % time.usec else time.strftime(@datetime_format) end end
def msg2str(msg) case msg when ::String msg when ::Exception "#{ msg.message } (#{ msg.class })\n" << (msg.backtrace || ).join("\n") else msg.inspect end end end f=Formatter.new f.datetime_format = "%Y-%m-%d %H:%M:%S" log.formatter=f
Using the above, I get the output that I like. However, that seems to me gross and unRubylike, probably not even guarranteed to continue working when I upgrade to a newer version of ActiveRecord. Does anyone know if there is an easier and smarter way to get the desired result?
Many Thanks!
Rohit
