CODEWITHSUNDEEP
ruby-on-railsrubylogging
Michael Durrant
Michael Durrant

Reputation: 96454

Ruby on Rails - using logger.info "hi" gives an undefined variable or method error, what to change/set?

I want to put something in the log, but I keep getting

NameError: undefined local variable or method 'logger' for Report:Class

I've tried

logger "hi"
logger 'hi'
logger.info 'hi'
Rails.logger "hi"

but I just get the above error.

I tried adding config.logger = Logger.new(STDOUT) to my config/environments/development.rb but that didn't help, still gettng the error.

I am running the method in script/console... but I exit and enter it each time to reload everything.

Upvotes: 2

Views: 2726

Answers (3)

Sohair Ahmad
Sohair Ahmad

Reputation: 457

You can use the Rails logger outside of Rails models in at least version 2.3.X. You might be used to doing the following in your models or controllers:

logger.info "Some debugging info I want to see in my development log."

If you make a regular model that doesn’t inherit from ActiveRecord, though, you may see the following error:

undefined local variable or method `logger' for #

The solution is to call Rails.logger.info (or debug, or warn) as follows:

Rails.logger.info "Some debugging info I want to see in my development log."

Upvotes: 0

severin
severin

Reputation: 10258

You have to use:

Rails.logger.info 'hi'

Rails.logger returns a logger instance, and by calling info, warn, error or debug on it with a message, this message is logged with the specified log level.

Within an ActiveRecord or ActionController instance you also have a logger convenience accessor available that returns Rails.logger.

Upvotes: 3

tadman
tadman

Reputation: 211560

Unless you have a variable or method called logger available in the scope you're executing that it won't magically exist. The config context is short-term, during initialization only.

Rails.logger is the global where you can usually access it.

Upvotes: 2

Related Questions