Logger - ror

From Sandoz

Source : http://guides.rubyonrails.org/debugging_rails_applications.html

You can also substitute another logger such as Log4R if you wish.

You can specify an alternative logger in your environment.rb or any environment file:

Rails.logger = Logger.new(STDOUT) Rails.logger = Log4r::Logger.new("Application Log")

Or in the Initializer section, add any of the following

config.logger = Logger.new(STDOUT) config.logger = Log4r::Logger.new("Application Log")

By default, each log is created under Rails.root/log/ and the log file name is environment_name.log.

To write in the current log use the logger.(debug|info|warn|error|fatal) method from within a controller, model or mailer:

logger.debug "Person attributes hash: #{@person.attributes.inspect}" logger.info "Processing the request..." logger.fatal "Terminating application, raised unrecoverable error!!!"

Example: class PostsController < ApplicationController

 # ...

 def create
   @post = Post.new(params[:post]) 
   logger.debug "New post: #{@post.attributes.inspect}"
   logger.debug "Post should be valid: #{@post.valid?}"