Adding missing Q methods: check(), flatten() (#1899)

Co-authored-by: Victorien <[email protected]>

django-stubs/db/models/query_utils.pyi

@@ -2,6 +2,7 @@ from collections import namedtuple
 from collections.abc import Collection, Iterable, Iterator, Mapping, Sequence
 from typing import Any, ClassVar, Literal, TypeVar
 
+from _typeshed import Incomplete
 from django.db.backends.base.base import BaseDatabaseWrapper
 from django.db.models.base import Model
 from django.db.models.expressions import BaseExpression
@@ -40,6 +41,8 @@ class Q(tree.Node):
         summarize: bool = ...,
         for_save: bool = ...,
     ) -> WhereNode: ...
+    def flatten(self) -> Iterator[Incomplete]: ...
+    def check(self, against: dict[str, Any], using: str = ...) -> bool: ...
     def deconstruct(self) -> tuple[str, Sequence[Any], dict[str, Any]]: ...
 
 class DeferredAttribute:

scripts/stubtest/allowlist_todo.txt

@@ -420,8 +420,6 @@ django.contrib.gis.db.models.PositiveIntegerField.integer_field_class
 django.contrib.gis.db.models.PositiveSmallIntegerField.formfield
 django.contrib.gis.db.models.PositiveSmallIntegerField.integer_field_class
 django.contrib.gis.db.models.Q.XOR
-django.contrib.gis.db.models.Q.check
-django.contrib.gis.db.models.Q.flatten
 django.contrib.gis.db.models.Q.resolve_expression
 django.contrib.gis.db.models.QuerySet.__contains__
 django.contrib.gis.db.models.QuerySet.__deepcopy__
@@ -969,8 +967,6 @@ django.db.models.PositiveIntegerField.integer_field_class
 django.db.models.PositiveSmallIntegerField.formfield
 django.db.models.PositiveSmallIntegerField.integer_field_class
 django.db.models.Q.XOR
-django.db.models.Q.check
-django.db.models.Q.flatten
 django.db.models.Q.resolve_expression
 django.db.models.QuerySet.__contains__
 django.db.models.QuerySet.__deepcopy__
@@ -1362,8 +1358,6 @@ django.db.models.query.prefetch_one_level
 django.db.models.query_utils.DeferredAttribute.__get__
 django.db.models.query_utils.InvalidQuery
 django.db.models.query_utils.Q.XOR
-django.db.models.query_utils.Q.check
-django.db.models.query_utils.Q.flatten
 django.db.models.query_utils.Q.resolve_expression
 django.db.models.query_utils.RegisterLookupMixin._unregister_lookup
 django.db.models.query_utils.RegisterLookupMixin.get_class_lookups