Let custom inventory batch view override logic for mobile UPC scanning

tailbone/templates/mobile/batch/inventory/view_row.mako

@@ -11,6 +11,9 @@
    if row.cases:
        uom = 'CS'
    elif row.units:
+       if row.product and row.product.weighed:
+           uom = 'LB'
+       else:
            uom = 'EA'
    elif row.case_quantity:
        uom = 'CS'

tailbone/views/inventory.py

@@ -27,6 +27,7 @@ Views for inventory batches
 from __future__ import unicode_literals, absolute_import
 
 import re
+import decimal
 
 import six
 
@@ -239,7 +240,22 @@ class InventoryBatchView(BatchMasterView):
         if upc:
 
             if len(upc) <= 14:
+                row = self.add_row_for_upc(batch, upc)
+                if not row:
+                    self.request.session.flash("Product not found: {}".format(upc), 'error')
+                    return self.redirect(self.get_action_url('view', batch, mobile=True))
 
+            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))
+
+    def add_row_for_upc(self, batch, upc):
+        """
+        Add a row to the batch for the given UPC, if applicable.
+        """
         # 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')
@@ -255,17 +271,7 @@ class InventoryBatchView(BatchMasterView):
                 row.upc = provided # TODO: why not 'checked' instead? how to choose?
                 row.description = "(unknown product)"
             self.handler.add_row(batch, row)
-
-                else:
-                    self.request.session.flash("Product not found: {}".format(upc), 'error')
-                    return self.redirect(self.get_action_url('view', batch, mobile=True))
-
-            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))
+            return row
 
     def template_kwargs_view_row(self, **kwargs):
         row = kwargs['instance']
@@ -425,12 +431,21 @@ class ValidBatchRow(forms.validators.ModelValidator):
         return row
 
 
+class Decimal(fe.validators.Number):
+
+    def _to_python(self, value, state):
+        try:
+            return decimal.Decimal(value)
+        except ValueError:
+            raise Invalid(self.message('number', state), value, state)
+
+
 class InventoryForm(forms.Schema):
     allow_extra_fields = True
     filter_extra_fields = True
     row = ValidBatchRow()
-    cases = fe.validators.Number()
-    units = fe.validators.Number()
+    cases = Decimal()
+    units = Decimal()
 
 
 def includeme(config):