Bind RequestScopeFactory so that auto_bind=False does not break

fastapi_injector/attach.py

@@ -2,7 +2,7 @@
 from injector import Injector, InstanceProvider, singleton
 
 from fastapi_injector.exceptions import InjectorNotAttached
-from fastapi_injector.request_scope import RequestScopeOptions
+from fastapi_injector.request_scope import RequestScopeFactory, RequestScopeOptions
 
 
 def attach_injector(
@@ -17,6 +17,7 @@ def attach_injector(
     injector.binder.bind(
         RequestScopeOptions, InstanceProvider(options), scope=singleton
     )
+    injector.binder.bind(RequestScopeFactory, to=RequestScopeFactory, scope=singleton)
 
 
 def get_injector_instance(app: FastAPI) -> Injector:

tests/test_request_scope.py

@@ -235,6 +235,31 @@ class DummyImpl:
         assert dummy1 is not dummy3
 
 
+async def test_works_without_auto_bind():
+    class DummyInterface:
+        pass
+
+    class DummyImpl:
+        pass
+
+    inj = Injector(auto_bind=False)
+    app = FastAPI()
+    app.add_middleware(InjectorMiddleware, injector=inj)
+    attach_injector(app, inj)
+    inj.binder.bind(DummyInterface, to=DummyImpl, scope=request_scope)
+
+    @app.get("/")
+    def get_root(
+        dummy: DummyInterface = Injected(DummyInterface),
+        dummy2: DummyInterface = Injected(DummyInterface),
+    ):
+        assert dummy is dummy2
+
+    async with httpx.AsyncClient(app=app, base_url="http://test") as client:
+        r = await client.get("/")
+    assert r.status_code == status.HTTP_200_OK
+
+
 class DummyContextManager:
     UNENTERED = object()
     ENTERED = object()