Heroku debugging

I am building an application with Heroku and having some problems. I want to debug some content like I do with rails serve开发者_StackOverflow中文版r:

logger.debug '...'

How can I do that in Heroku, so I can see the debugging in heroku logs? (or anything else..)

Thanks!

Details here: http://devcenter.heroku.com/articles/logging

Also make sure you set the right Logging level for your Rails app: http://blog.sethladd.com/2005/11/adjust-log-level-in-ruby-on-rails.html

The Cedar stack in Heroku does not appear to be responsive to the LOG_LEVEL config (env) variable that works for previous stacks (I use the logging:expanded addon). I tried setting LOG_LEVEL to both debug and DEBUG without success.

Only by setting config.log_level = :debug in config/environments/production.rb am I able to see the output of 'logger.debug'.

Been fighting with this for a long time, solution is nice and simple:

Set in production.rb instead of

config.log_level = :debug

place:

config.logger = Logger.new(STDOUT)
config.logger.level = Logger::DEBUG

and you get the full logging output.

heroku logs on your command line will give you the logs for the current app. If you have expanded logging turned on you can tail this output

Using Rails 3.2, we made this configurable by modifying config/environments/{environment}.rb to drive it from an environment variable:

config.log_level = ENV["LOG_LEVEL"].to_sym if ENV["LOG_LEVEL"]

Then, we can modify the Heroku config variable to change it:

heroku config:set LOG_LEVEL=debug --app <app name>

This lets us easily log more or less as needed.

This worked for me:

heroku config:set LOG_LEVEL=debug

To write to your logs on Heroku, instead of using logger.debug "..." simply use puts:

puts "..."

You don't even need to set the config.log_level setting in config/environments/production.rb.

See the docs here.

config.log_level = ENV['APP_LOG_LEVEL'] ? ENV['APP_LOG_LEVEL'].to_sym : :error