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!

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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

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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'.

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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.

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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

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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.

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This worked for me:

heroku config:set LOG_LEVEL=debug

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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.

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