Create vehicle.rb

app/models/vehicle.rb

@@ -72,7 +72,7 @@ class Vehicle < ActiveRecord::Base
   # Force Upper Case for VIN numbers
   def vin=(val)
     #strip VIN of all illegal chars (for barcode scanner)
-    val.to_s.upcase.gsub(/[^A-HJ-NPR-Za-hj-npr-z\d]+/,"")
+    val = val.to_s.upcase.gsub(/[^A-HJ-NPR-Za-hj-npr-z\d]+/,"")
     write_attribute(:vin, val)
   end