cleanup some stubs in contrib.admin, contrib.admindocs (#169)

django-stubs/contrib/admin/decorators.pyi

@@ -1,3 +1,5 @@
-from typing import Any, Callable, Optional
+from typing import Any, Callable, Optional, Type
 
-def register(*models: Any, site: Optional[Any] = ...) -> Callable: ...
+from django.db.models.base import Model
+
+def register(*models: Type[Model], site: Optional[Any] = ...) -> Callable: ...

django-stubs/contrib/admin/helpers.pyi

@@ -1,4 +1,4 @@
-from typing import Any, Callable, Dict, Iterator, List, Optional, Tuple, Union
+from typing import Any, Callable, Dict, Iterator, List, Optional, Tuple, Union, Iterable
 
 from django.contrib.auth.forms import AdminPasswordChangeForm
 from django.forms.boundfield import BoundField
@@ -26,7 +26,7 @@ class AdminForm:
         form: AdminPasswordChangeForm,
         fieldsets: List[Tuple[None, Dict[str, List[str]]]],
         prepopulated_fields: Dict[Any, Any],
-        readonly_fields: Any = ...,
+        readonly_fields: Optional[Iterable[Any]] = ...,
         model_admin: Any = ...,
     ) -> None: ...
     def __iter__(self) -> Iterator[Fieldset]: ...
@@ -47,7 +47,7 @@ class Fieldset:
         self,
         form: Any,
         name: Optional[Any] = ...,
-        readonly_fields: Any = ...,
+        readonly_fields: Optional[Iterable[Any]] = ...,
         fields: Any = ...,
         classes: Any = ...,
         description: Optional[Any] = ...,
@@ -64,7 +64,7 @@ class Fieldline:
     model_admin: Any = ...
     readonly_fields: Any = ...
     def __init__(
-        self, form: Any, field: Any, readonly_fields: Optional[Any] = ..., model_admin: Optional[Any] = ...
+        self, form: Any, field: Any, readonly_fields: Optional[Iterable[Any]] = ..., model_admin: Optional[Any] = ...
     ) -> None: ...
     def __iter__(self) -> Iterator[Union[AdminField, AdminReadonlyField]]: ...
     def errors(self) -> SafeText: ...

django-stubs/contrib/admin/options.pyi

@@ -56,7 +56,6 @@ class BaseModelAdmin:
     show_full_result_count: bool = ...
     checks_class: Any = ...
     def check(self, **kwargs: Any) -> List[Union[str, Error]]: ...
-    def __init__(self) -> None: ...
     def formfield_for_dbfield(
         self, db_field: Field, request: Optional[HttpRequest], **kwargs: Any
     ) -> Optional[Field]: ...
@@ -94,7 +93,6 @@ class BaseModelAdmin:
     def has_module_permission(self, request: HttpRequest) -> bool: ...
 
 class ModelAdmin(BaseModelAdmin):
-    formfield_overrides: Any
     list_display: Sequence[Union[str, Callable]] = ...
     list_display_links: Optional[Sequence[Union[str, Callable]]] = ...
     list_filter: Sequence[Union[str, Type[ListFilter], Tuple[str, Type[ListFilter]]]] = ...
@@ -122,7 +120,6 @@ class ModelAdmin(BaseModelAdmin):
     actions_on_top: bool = ...
     actions_on_bottom: bool = ...
     actions_selection_counter: bool = ...
-    checks_class: Any = ...
     model: Type[Model] = ...
     opts: Options = ...
     admin_site: AdminSite = ...

django-stubs/contrib/admin/sites.pyi

@@ -1,11 +1,11 @@
-from typing import Any, Callable, Dict, List, Optional, Tuple, Type, Union
+from typing import Any, Callable, Dict, Iterable, List, Optional, Tuple, Type, Union
 
 from django.contrib.admin.options import ModelAdmin
 from django.core.handlers.wsgi import WSGIRequest
 from django.db.models.base import Model
 from django.http.response import HttpResponse
 from django.template.response import TemplateResponse
-from django.urls.resolvers import URLPattern, URLResolver
+from django.urls.resolvers import URLResolver
 from django.utils.functional import LazyObject
 
 all_sites: Any
@@ -31,11 +31,11 @@ class AdminSite:
     def check(self, app_configs: None) -> List[Any]: ...
     def register(
         self,
-        model_or_iterable: Union[List[Type[Model]], Tuple[Type[Model]], Type[Model]],
+        model_or_iterable: Union[Type[Model], Iterable[Type[Model]]],
         admin_class: Optional[Type[ModelAdmin]] = ...,
         **options: Any
     ) -> None: ...
-    def unregister(self, model_or_iterable: Type[Model]) -> None: ...
+    def unregister(self, model_or_iterable: Union[Type[Model], Iterable[Type[Model]]]) -> None: ...
     def is_registered(self, model: Type[Model]) -> bool: ...
     def add_action(self, action: Callable, name: None = ...) -> None: ...
     def disable_action(self, name: str) -> None: ...

django-stubs/contrib/admin/views/decorators.pyi

@@ -1,5 +1,7 @@
-from typing import Any, Callable, Optional
+from typing import Callable, TypeVar, overload
 
-def staff_member_required(
-    view_func: Optional[Callable] = ..., redirect_field_name: str = ..., login_url: str = ...
-) -> Callable: ...
+_C = TypeVar("_C", bound=Callable)
+@overload
+def staff_member_required(view_func: _C = ..., redirect_field_name: str = ..., login_url: str = ...) -> _C: ...
+@overload
+def staff_member_required(view_func: None = ..., redirect_field_name: str = ..., login_url: str = ...) -> Callable: ...