Open
Description
Recently we've upgraded our project to Django 4.1 (and Silk to 5.0.1 from 4.3.0), and a unique constraint on a model has begun to fail whilst Silk is enabled.
class MyModel(models.Model):
name = models.CharField(max_length=255, blank=True)
class Meta:
constraints = [
UniqueConstraint(
fields=["name"],
condition=~Q(name=""),
name="unique_name_if_provided",
),
]The error is being raised here: silk/sql.py:94
Full stack trace:
Traceback (most recent call last):
File "/path/to/python3.10/site-packages/django/core/handlers/exception.py", line 55, in inner
response = get_response(request)
File "/path/to/python3.10/site-packages/django/core/handlers/base.py", line 197, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/path/to/python3.10/site-packages/django/views/generic/base.py", line 103, in view
return self.dispatch(request, *args, **kwargs)
File "/path/to/python3.10/site-packages/django/contrib/auth/mixins.py", line 109, in dispatch
return super().dispatch(request, *args, **kwargs)
File "/path/to/python3.10/site-packages/django/views/generic/base.py", line 142, in dispatch
return handler(request, *args, **kwargs)
File "...", line 640, in post
return super().post(request, *args, **kwargs)
File "...", line 609, in post
if form.is_valid():
File "/path/to/lib/python3.10/site-packages/django/forms/forms.py", line 205, in is_valid
return self.is_bound and not self.errors
File "/path/to/lib/python3.10/site-packages/django/forms/forms.py", line 200, in errors
self.full_clean()
File "/path/to/lib/python3.10/site-packages/django/forms/forms.py", line 439, in full_clean
self._post_clean()
File "/path/to/lib/python3.10/site-packages/django/forms/models.py", line 492, in _post_clean
self.instance.full_clean(exclude=exclude, validate_unique=False)
File "/path/to/python3.10/site-packages/django/db/models/base.py", line 1491, in full_clean
self.validate_constraints(exclude=exclude)
File "/path/to/python3.10/site-packages/django/db/models/base.py", line 1442, in validate_constraints
constraint.validate(model_class, self, exclude=exclude, using=using)
File "/path/to/python3.10/site-packages/django/db/models/constraints.py", line 358, in validate
if (self.condition & Exists(queryset.filter(self.condition))).check(
File "/path/to/python3.10/site-packages/django/db/models/query_utils.py", line 137, in check
return compiler.execute_sql(SINGLE) is not None
File "/path/to/python3.10/site-packages/silk/sql.py", line 94, in execute_sql
if self.query.model.__module__ != 'silk.models':
Exception Type: AttributeError at ...
Exception Value: 'NoneType' object has no attribute '__module__'And finally, the query attempted to be run:
SELECT 1 AS "_check" WHERE (NOT (provided_name = ) AND EXISTS(SELECT 1 AS "a" FROM "..." U0 WHERE (U0."name" = provided_name AND NOT (U0."name" = )) LIMIT 1))Prior to the Django 4.1 upgrade, this constraint was working without a hitch with Silk running.
All other unique constraints within the system appear to still be functioning fine, including two other unique constraints on this same model, but this one with condition=~Q() is failing.