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
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