Custom Logger in rails 3.2.x. Store logs in different logs based on environment as well, All in one file.

custom_logger.rb

# If you wish to store everything in one logger file then do this.

class CustomLogger
  LOGGERFILE  = File.join("#{Rails.root}/log/category_clicks_#{Rails.env}_errors.log")
 
  def self.log( message, severity = :info )  
    @category_click_logger  ||= ActiveSupport::BufferedLogger.new( LOGGERFILE )
    @model_log.send severity, "[#{Time.now.to_s(:db)}] [#{severity.to_s.capitalize}] #{message}\n" 
  end
end

#now call this function throughout your rails application like this :

CustomLogger.log( "this message should go in the logger." , :error )

OR

CustomLogger.log "this message should go in the logger." , :error