Undefined method `tagged' for Formatter error after Rails 4 upgrade
activeresource, ruby, ruby-on-rails-3.2, ruby-on-rails-4
Solution
Are you using a customer logger?
Check in `config/environments/development.rb`. That's where the logger is usually assigned.
Also, look in `config/initializers` for logging-related monkey patches.
I was using Chris Powell's logger patch, and it caused a very similar error.
If you're using that patch, there's an updated one for Rails 4: http://cbpowell.wordpress.com/2013/08/09/beautiful-logging-for-ruby-on-rails-4/
Problem
I have upgraded from Rails 3.2 to Rails 4 by following the Ruby Screencast guide. My tests are running and the server starts, yet I receive an error when I send a request: ``` ERROR NoMethodError: undefined method `tagged' for #<Formatter:0x000000057f5dc8> /home/mahoni/.rvm/gems/ruby-2.0.0-p195/gems/activesupport-4.0.0/lib/active_support/tagged_logging.rb:67:in `tagged' /home/mahoni/.rvm/gems/ruby-2.0.0-p195/gems/railties-4.0.0/lib/rails/rack/logger.rb:21:in `call' /home/mahoni/.rvm/gems/ruby-2.0.0-p195/gems/quiet_assets-1.0.2/lib/quiet_assets.rb:18:in `call_with_quiet_assets' /home/mahoni/.rvm/gems/ruby-2.0.0-p195/gems/actionpack-4.0.0/lib/action_dispatch/middleware/request_id.rb:21:in `call' /home/mahoni/.rvm/gems/ruby-2.0.0-p195/gems/rack-1.5.2/lib/rack/methodoverride.rb:21:in `call' /home/mahoni/.rvm/gems/ruby-2.0.0-p195/gems/rack-1.5.2/lib/rack/runtime.rb:17:in `call' /home/mahoni/.rvm/gems/ruby-2.0.0-p195/gems/activesupport-4.0.0/lib/active_support/cache/strategy/local_cache.rb:83:in `call' /home/mahoni/.rvm/gems/ruby-2.0.0-p195/gems/actionpack-4.0.0/lib/action_dispatch/middleware/static.rb:64:in `call' /home/mahoni/.rvm/gems/ruby-2.0.0-p195/gems/railties-4.0.0/lib/rails/engine.rb:511:in `call' /home/mahoni/.rvm/gems/ruby-2.0.0-p195/gems/railties-4.0.0/lib/rails/application.rb:97:in `call' /home/mahoni/.rvm/gems/ruby-2.0.0-p195/gems/rack-1.5.2/lib/rack/lock.rb:17:in `call' /home/mahoni/.rvm/gems/ruby-2.0.0-p195/gems/rack-1.5.2/lib/rack/content_length.rb:14:in `call' /home/mahoni/.rvm/gems/ruby-2.0.0-p195/gems/rack-1.5.2/lib/rack/handler/webrick.rb:60:in `service' /home/mahoni/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/webrick/httpserver.rb:138:in `service' /home/mahoni/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/webrick/httpserver.rb:94:in `run' /home/mahoni/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/webrick/server.rb:295:in `block in start_thread' ``` I have I have looked at the code, and it does not make sense for me. It calls `logger.tagged`. The object behind the variable `logger` is not a logger, but a `Formatter` object. This is strange. Any idea what could cause this? So far I: - deleted my `Gemfile.lock` - `gem update rails` - `bundle install` - `bundle update` In this and different orders. How can I approach this?