Add type hints to flask_sqlalchemy.model (#8389)

Author: Kevin Kirsche

stubs/Flask-SQLAlchemy/flask_sqlalchemy/model.pyi

@@ -1,7 +1,11 @@
 from re import Pattern
-from typing import Any
+from typing import Any, Generic, TypeVar
 
+from sqlalchemy import Table
 from sqlalchemy.ext.declarative import DeclarativeMeta
+from sqlalchemy.orm import Query
+
+_ModelT = TypeVar("_ModelT")
 
 def should_set_tablename(cls: type) -> bool: ...
 
@@ -10,14 +14,14 @@ camelcase_re: Pattern[str]
 def camel_to_snake_case(name: str) -> str: ...
 
 class NameMetaMixin(type):
-    def __init__(cls, name, bases, d) -> None: ...
-    def __table_cls__(cls, *args, **kwargs): ...
+    def __init__(cls, name: str, bases: tuple[type, ...], d: dict[str, Any]) -> None: ...
+    def __table_cls__(cls, *args, **kwargs) -> Table | None: ...
 
 class BindMetaMixin(type):
-    def __init__(cls, name, bases, d) -> None: ...
+    def __init__(cls, name: str, bases: tuple[type, ...], d: dict[str, Any]) -> None: ...
 
 class DefaultMeta(NameMetaMixin, BindMetaMixin, DeclarativeMeta): ...
 
-class Model:
-    query_class: Any | None
-    query: Any | None
+class Model(Generic[_ModelT]):
+    query_class: type[Query[_ModelT]] | None
+    query: Query[_ModelT] | None