Add missing methods and superclass to FieldFile (#2051)

Co-authored-by: Nikita Sobolev <[email protected]>

django-stubs/db/models/fields/files.pyi

@@ -9,11 +9,12 @@ from django.db.models.base import Model
 from django.db.models.expressions import Expression
 from django.db.models.fields import NOT_PROVIDED, Field, _ErrorMessagesMapping, _FieldChoices
 from django.db.models.query_utils import DeferredAttribute
+from django.db.models.utils import AltersData
 from django.utils._os import _PathCompatible
 from django.utils.functional import _StrOrPromise
 from typing_extensions import Self
 
-class FieldFile(File):
+class FieldFile(File, AltersData):
     instance: Model
     field: FileField
     storage: Storage
@@ -31,6 +32,10 @@ class FieldFile(File):
     def delete(self, save: bool = ...) -> None: ...
     @property
     def closed(self) -> bool: ...
+    def __getstate__(self) -> dict[str, Any]: ...
+    def __setstate__(self, state: dict[str, Any]) -> None: ...
+    def __eq__(self, other: object) -> bool: ...
+    def __hash__(self) -> int: ...
 
 class FileDescriptor(DeferredAttribute):
     field: FileField

django-stubs/db/models/utils.pyi

@@ -7,3 +7,6 @@ def make_model_tuple(model: type[Model] | str | tuple[str, str]) -> tuple[str, s
 def resolve_callables(mapping: MutableMapping[str, Any]) -> Iterator[tuple[str, Any]]: ...
 def unpickle_named_row(names: Iterable[str], values: Iterable[Any]) -> NamedTuple: ...
 def create_namedtuple_class(*names: str) -> type[NamedTuple]: ...
+
+class AltersData:
+    def __init_subclass__(cls, **kwargs: Any) -> None: ...

scripts/stubtest/allowlist_todo.txt

@@ -1416,7 +1416,6 @@ django.db.models.sql.where.WhereNode.set_source_expressions
 django.db.models.sql.where.WhereNode.split_having
 django.db.models.sql.where.WhereNode.split_having_qualify
 django.db.models.sql.where.XOR
-django.db.models.utils.AltersData
 django.db.utils.ConnectionHandler.configure_settings
 django.db.utils.ConnectionHandler.ensure_defaults
 django.db.utils.ConnectionHandler.prepare_test_settings