Ticket #4630: possible_patch_fields.py.diff

fields.py

@@ -518 +518 @@
         errors = ErrorList()
         if self.required and not value:
             raise ValidationError(gettext(u'This field is required.'))
-        elif not self.required and not value:
-            return self.compress([])
+        elif not self.required:
+            value_empty = False
+            for v in value:
+                if v == '':
+                    value_empty = True
+                    break
+            if value_empty:
+                return self.compress([])
         if not isinstance(value, (list, tuple)):
             raise ValidationError(gettext(u'Enter a list of values.'))
         for i, field in enumerate(self.fields):