xtremelabs/xl-passbook-ruby — pull request #6 by Sjors (2012-11-24 13:13:42+00:00)
Title: Allow integer value for serialNumber.

I prefer using an integer database field for the serial number, but that crashes the Passbook app because it expects a string. I modified pkpass.rb to convert integers to strings (.to_s). This should not have any effect if your serial number field is already a string.