diff options
Diffstat (limited to 'django/forms/models.py')
| -rw-r--r-- | django/forms/models.py | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/django/forms/models.py b/django/forms/models.py index cc43612bf5..37fce6824c 100644 --- a/django/forms/models.py +++ b/django/forms/models.py @@ -319,9 +319,7 @@ class BaseModelForm(BaseForm): if self.instance.pk is not None: qs = qs.exclude(pk=self.instance.pk) - # This cute trick with extra/values is the most efficient way to - # tell if a particular query returns any results. - if qs.extra(select={'a': 1}).values('a').order_by(): + if qs.exists(): if len(unique_check) == 1: self._errors[unique_check[0]] = ErrorList([self.unique_error_message(unique_check)]) else: @@ -354,9 +352,7 @@ class BaseModelForm(BaseForm): if self.instance.pk is not None: qs = qs.exclude(pk=self.instance.pk) - # This cute trick with extra/values is the most efficient way to - # tell if a particular query returns any results. - if qs.extra(select={'a': 1}).values('a').order_by(): + if qs.exists(): self._errors[field] = ErrorList([ self.date_error_message(lookup_type, field, unique_for) ]) |