active_record configuration from yaml file: debuglevel - ruby

Question

I'm trying to configure the debuglevel for active-record logger from a YAML configuration file but get the following error, how could i do this other than using a number in the YAML ?
sample.rb:30 warning: toplevel constant LEVEL referenced by Logger::LEVEL
"DEBUG"
ArgumentError: comparison of Fixnum with String failed
here is the sample.rb
require 'java'
require 'active_record'
require 'activerecord-jdbc-adapter'
require 'yaml'
require 'logger'
def get_jar_path
if __FILE__[/.+\.jar!/] #in case run from JAR
scriptpath = __FILE__[/(.*)\/.+\.jar!/]
$1[6..-1]
else #in case run with jRuby
'..'
end
end
def load_config
path = "#{get_jar_path}/#{File.basename(__FILE__, ".*")}.configuration.yml"
p path
$conf = YAML::load_file(path)
end
load_config
LEVEL = $conf['debug_level'] #string 'DEBUG' from configuration file
$log = Logger.new( "#{get_jar_path}/log_#{Time.now.strftime("%Y%m%d")}.txt", 'monthly' )
ActiveRecord::Base.logger = $log
ActiveRecord::Base.logger.level = Logger::DEBUG #works
ActiveRecord::Base.logger.level = Logger::LEVEL #doesn't work
p ActiveRecord::Base.logger.level
$log.info "start #{__FILE__}"

Answer 1

The available log levels are: :debug, :info, :warn, :error, :fatal,
and :unknown, corresponding to the log level numbers from 0 up to 5
respectively.
http://guides.rubyonrails.org/debugging_rails_applications.html
require 'logger'
puts Logger::DEBUG
--output:--
0
str = "DEBUG"
puts Logger.const_get(str)
--output:--
0
So you should do something like:
level = $conf['debug_level'] #string 'DEBUG' from configuration file
$log = Logger.new( "#{get_jar_path}/log_#{Time.now.strftime("%Y%m%d")}.txt", 'monthly' )
ActiveRecord::Base.logger = $log
ActiveRecord::Base.logger.level = Logger.const_get(level)
I'm not sure why you thought defining a constant, LEVEL, in the current scope would make that constant appear in the Logger scope, so that you could write Logger::LEVEL. You essentially did this:
MYCONST = "hello"
module SomeModule
SOMECONST = "goodbye"
end
You can write:
puts MYCONST #=>hello
..and you can write:
puts SomeModule::SOMECONST #goodbye
..but you cannot write:
puts SomeModule::MYCONST
--output:--
1.rb:10:in `<main>': uninitialized constant SomeModule::MYCONST (NameError)