Ticket #11577: plnipfield.patch

contrib/localflavor/pl/forms.py

@@ -78 +78 @@
 
     def clean(self,value):
         super(PLNIPField, self).clean(value)
-        value = re.sub("[-]", "", value)
-        if not self.has_valid_checksum(value):
-            raise ValidationError(self.error_messages['checksum'])
+        if len(value):
+            value2 = re.sub("[-]", "", value)
+            if not self.has_valid_checksum(value2):
+                raise ValidationError(self.error_messages['checksum'])
         return u'%s' % value
 
     def has_valid_checksum(self, number):