Validate vendor for catalog batch upload

tailbone/views/batch/vendorcatalog.py

@@ -202,6 +202,8 @@ class VendorCatalogView(FileBatchMasterView):
         if self.creating and 'vendor' in f:
             f.replace('vendor', 'vendor_uuid')
             f.set_label('vendor_uuid', "Vendor")
+            f.set_required('vendor_uuid')
+            f.set_validator('vendor_uuid', self.valid_vendor_uuid)
 
             # should we use dropdown or autocomplete?  note that if
             # autocomplete is to be used, we also must make sure we
@@ -258,6 +260,13 @@ class VendorCatalogView(FileBatchMasterView):
         else:
             f.remove('cache_products')
 
+    def valid_vendor_uuid(self, node, value):
+        model = self.model
+        if value:
+            vendor = self.Session.get(model.Vendor, value)
+            if not vendor:
+                raise colander.Invalid(node, "Vendor not found")
+
     def render_parser_key(self, batch, field):
         key = getattr(batch, field)
         if not key: