diff options
Diffstat (limited to 'rest_framework/validators.py')
| -rw-r--r-- | rest_framework/validators.py | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/rest_framework/validators.py b/rest_framework/validators.py index fa4f1847..7ca4e6a9 100644 --- a/rest_framework/validators.py +++ b/rest_framework/validators.py @@ -93,6 +93,9 @@ class UniqueTogetherValidator: The `UniqueTogetherValidator` always forces an implied 'required' state on the fields it applies to. """ + if self.instance is not None: + return + missing = dict([ (field_name, self.missing_message) for field_name in self.fields @@ -105,8 +108,17 @@ class UniqueTogetherValidator: """ Filter the queryset to all instances matching the given attributes. """ + # If this is an update, then any unprovided field should + # have it's value set based on the existing instance attribute. + if self.instance is not None: + for field_name in self.fields: + if field_name not in attrs: + attrs[field_name] = getattr(self.instance, field_name) + + # Determine the filter keyword arguments and filter the queryset. filter_kwargs = dict([ - (field_name, attrs[field_name]) for field_name in self.fields + (field_name, attrs[field_name]) + for field_name in self.fields ]) return queryset.filter(**filter_kwargs) |