Warn if user "scans" UPC with more than 14 digits, for mobile inventory

never assume such a UPC is valid, warn instead of adding batch row

tailbone/views/inventory.py

@@ -235,6 +235,8 @@ class InventoryBatchView(BatchMasterView):
         upc = re.sub(r'\D', '', upc)
         if upc:
 
+            if len(upc) <= 14:
+
                 # try to locate general product by UPC; add to batch either way
                 provided = GPC(upc, calc_check_digit=False)
                 checked = GPC(upc, calc_check_digit='upc')
@@ -250,6 +252,10 @@ class InventoryBatchView(BatchMasterView):
                     row.description = "(unknown product)"
                 self.handler.add_row(batch, row)
 
+            else:
+                self.request.session.flash("UPC has too many digits ({}): {}".format(len(upc), upc), 'error')
+                return self.redirect(self.get_action_url('view', batch, mobile=True))
+
         self.Session.flush()
         return self.redirect(self.mobile_row_route_url('view', uuid=row.batch_uuid, row_uuid=row.uuid))