Edit: Better yet, just switch over to JSON
We're in the process of upgrading Kumu to Rails 4 on Ruby 2.0. So far things have gone pretty smooth but today we ran into issue that hasn't had much coverage.
If you're using ActiveRecord::Store and upgrading to Ruby 2.0 you'll want to make
sure your store columns default to empty strings instead of nils. If you don't
you may run into the following:
TypeError: no implicit conversion of nil into String
~/.rbenv/versions/2.0.0-p353/lib/ruby/2.0.0/psych.rb:205:in `parse'
~/.rbenv/versions/2.0.0-p353/lib/ruby/2.0.0/psych.rb:205:in `parse_stream'
~/.rbenv/versions/2.0.0-p353/lib/ruby/2.0.0/psych.rb:153:in `parse'
~/.rbenv/versions/2.0.0-p353/lib/ruby/2.0.0/psych.rb:129:in `load'
We use the YAML coder and since this is a parsing issue it's likely coder specific.
Not sure if the other coders have the same issue but wanted to throw out a quick
heads up.