Enable stack dump on exception in Rails console

I found a solution myself.

Apparently, I was in need of the command wtf? that comes with pry.

[7] project »  p.known_attributesNoMethodError: undefined method `foo' for #<Bar:0x007f871fd12a38>from /[...]/gems/activemodel-4.0.0/lib/active_model/attribute_methods.rb:436:in `method_missing'[8] project »  wtf?Exception: NoMethodError: undefined method `foo' for #<Bar:0x007f871fd12a38>--[... stack dump ...]  [9] project »  

When there's an error in console you should see something like this

$ rails cLoading development environment (Rails 4.0.0)irb(main):001:0> no_methodNameError: undefined local variable or method `no_method' for main:Object    from (irb):1    from /Users/michal/Projects/tennisliga/.gems/gems/railties-4.0.0/lib/rails/commands/console.rb:90:in `start'    from /Users/michal/Projects/tennisliga/.gems/gems/railties-4.0.0/lib/rails/commands/console.rb:9:in `start'    from /Users/michal/Projects/tennisliga/.gems/gems/railties-4.0.0/lib/rails/commands.rb:64:in `<top (required)>'    from bin/rails:4:in `require'    from bin/rails:4:in `<main>'

What's the problem with it? You don't see the stack trace?

EDIT:If you're using pry and would like to see more stack trace, refer to pry wikiShort example (show all lines)

Pry.config.exception_handler = proc do |output, exception, _pry_|  output.puts "#{exception}"  output.puts "#{exception.backtrace}"end