Add SessionBase methods, change SessionStore.get_model_class() return (…

…#1517)

Improve typing in `contrib.session.backends`

Co-authored-by: Marti Raudsepp <[email protected]>

django-stubs/contrib/sessions/backends/base.pyi

@@ -13,12 +13,14 @@ class SessionBase(dict[str, Any]):
     modified: bool
     serializer: Any
     def __init__(self, session_key: str | None = ...) -> None: ...
+    @property
+    def key_salt(self) -> str: ...
     def set_test_cookie(self) -> None: ...
     def test_cookie_worked(self) -> bool: ...
     def delete_test_cookie(self) -> None: ...
     def encode(self, session_dict: dict[str, Any]) -> str: ...
     def decode(self, session_data: bytes | str) -> dict[str, Any]: ...
-    def has_key(self, key: Any) -> Any: ...
+    def has_key(self, key: Any) -> bool: ...
     def keys(self) -> Any: ...
     def values(self) -> Any: ...
     def items(self) -> Any: ...
@@ -32,6 +34,7 @@ class SessionBase(dict[str, Any]):
     def _session_key(self) -> str | None: ...
     @_session_key.setter
     def _session_key(self, value: str | None) -> None: ...
+    def get_session_cookie_age(self) -> int: ...
     def get_expiry_age(self, **kwargs: Any) -> int: ...
     def get_expiry_date(self, **kwargs: Any) -> datetime: ...
     def set_expiry(self, value: datetime | int | None) -> None: ...

django-stubs/contrib/sessions/backends/db.pyi

@@ -1,12 +1,11 @@
 from django.contrib.sessions.backends.base import SessionBase
 from django.contrib.sessions.base_session import AbstractBaseSession
-from django.contrib.sessions.models import Session
 from django.db.models.base import Model
 
 class SessionStore(SessionBase):
     def __init__(self, session_key: str | None = ...) -> None: ...
     @classmethod
-    def get_model_class(cls) -> type[Session]: ...
+    def get_model_class(cls) -> type[AbstractBaseSession]: ...
     @property
     def model(self) -> type[AbstractBaseSession]: ...
     def create_model_instance(self, data: dict[str, Model]) -> AbstractBaseSession: ...