Merge c3d12d7729 into ed12105cce

fastapi/dependencies/utils.py

@@ -48,7 +48,7 @@ from fastapi.dependencies.models import Dependant
 from fastapi.exceptions import DependencyScopeError
 from fastapi.logger import logger
 from fastapi.security.oauth2 import SecurityScopes
-from fastapi.types import DependencyCacheKey
+from fastapi.types import DependencyCacheKey, DependencyOverridesProvider
 from fastapi.utils import create_model_field, get_path_param_names
 from pydantic import BaseModel, Json
 from pydantic.fields import FieldInfo
@@ -569,7 +569,7 @@ async def solve_dependencies(
     body: dict[str, Any] | FormData | None = None,
     background_tasks: StarletteBackgroundTasks | None = None,
     response: Response | None = None,
-    dependency_overrides_provider: Any | None = None,
+    dependency_overrides_provider: DependencyOverridesProvider | None = None,
     dependency_cache: dict[DependencyCacheKey, Any] | None = None,
     # TODO: remove this parameter later, no longer used, not removing it yet as some
     # people might be monkey patching this function (although that's not supported)
@@ -601,9 +601,9 @@ async def solve_dependencies(
             and dependency_overrides_provider.dependency_overrides
         ):
             original_call = sub_dependant.call
-            call = getattr(
-                dependency_overrides_provider, "dependency_overrides", {}
-            ).get(original_call, original_call)
+            call = dependency_overrides_provider.dependency_overrides.get(
+                original_call, original_call
+            )
             use_path: str = sub_dependant.path  # type: ignore
             use_sub_dependant = get_dependant(
                 path=use_path,

fastapi/routing.py

@@ -53,7 +53,7 @@ from fastapi.exceptions import (
     ResponseValidationError,
     WebSocketRequestValidationError,
 )
-from fastapi.types import DecoratedCallable, IncEx
+from fastapi.types import DecoratedCallable, DependencyOverridesProvider, IncEx
 from fastapi.utils import (
     create_model_field,
     generate_unique_id,
@@ -326,7 +326,7 @@ def get_request_handler(
     response_model_exclude_unset: bool = False,
     response_model_exclude_defaults: bool = False,
     response_model_exclude_none: bool = False,
-    dependency_overrides_provider: Any | None = None,
+    dependency_overrides_provider: DependencyOverridesProvider | None = None,
     embed_body_fields: bool = False,
 ) -> Callable[[Request], Coroutine[Any, Any, Response]]:
     assert dependant.call is not None, "dependant.call must be a function"
@@ -474,7 +474,7 @@ def get_request_handler(
 
 def get_websocket_app(
     dependant: Dependant,
-    dependency_overrides_provider: Any | None = None,
+    dependency_overrides_provider: DependencyOverridesProvider | None = None,
     embed_body_fields: bool = False,
 ) -> Callable[[WebSocket], Coroutine[Any, Any, Any]]:
     async def app(websocket: WebSocket) -> None:
@@ -517,7 +517,7 @@ class APIWebSocketRoute(routing.WebSocketRoute):
         *,
         name: str | None = None,
         dependencies: Sequence[params.Depends] | None = None,
-        dependency_overrides_provider: Any | None = None,
+        dependency_overrides_provider: DependencyOverridesProvider | None = None,
     ) -> None:
         self.path = path
         self.endpoint = endpoint
@@ -577,7 +577,7 @@ class APIRoute(routing.Route):
         response_model_exclude_none: bool = False,
         include_in_schema: bool = True,
         response_class: type[Response] | DefaultPlaceholder = Default(JSONResponse),
-        dependency_overrides_provider: Any | None = None,
+        dependency_overrides_provider: DependencyOverridesProvider | None = None,
         callbacks: list[BaseRoute] | None = None,
         openapi_extra: dict[str, Any] | None = None,
         generate_unique_id_function: Callable[["APIRoute"], str]
@@ -844,7 +844,7 @@ class APIRouter(routing.Router):
             ),
         ] = None,
         dependency_overrides_provider: Annotated[
-            Any | None,
+            DependencyOverridesProvider | None,
             Doc(
                 """
                 Only used internally by FastAPI to handle dependency overrides.

fastapi/types.py

@@ -1,7 +1,7 @@
 import types
 from collections.abc import Callable
 from enum import Enum
-from typing import Any, TypeVar, Union
+from typing import Any, Protocol, TypeVar, Union
 
 from pydantic import BaseModel
 from pydantic.main import IncEx as IncEx
@@ -10,3 +10,7 @@ DecoratedCallable = TypeVar("DecoratedCallable", bound=Callable[..., Any])
 UnionType = getattr(types, "UnionType", Union)
 ModelNameMap = dict[type[BaseModel] | type[Enum], str]
 DependencyCacheKey = tuple[Callable[..., Any] | None, tuple[str, ...], str]
+
+
+class DependencyOverridesProvider(Protocol):
+    dependency_overrides: dict[Callable[..., Any], Any]