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Form or File not working with APIRouter

See original GitHub issue

File as well as Form input is working in Fastapi object but not APIRouter object. This is not working – >

router = APIRouter()
@router.post("/profile/update-media")
async def update_media(
    file: bytes = File(...)
):
    return True

This is working —>

router = FastAPI()
@router.post("/profile/update-media")
async def update_media(
    file: bytes = File(...)
):
    return True

In APIRouter one I am getting key error in fastapi utils. Traceback-

ERROR:    Exception in ASGI application
Traceback (most recent call last):
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\uvicorn\protocols\http\h11_impl.py", line 388, in run_asgi
    result = await app(self.scope, self.receive, self.send)
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\uvicorn\middleware\proxy_headers.py", line 45, in __call__
    return await self.app(scope, receive, send)
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\fastapi\applications.py", line 179, in __call__
    await super().__call__(scope, receive, send)
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\starlette\applications.py", line 111, in __call__
    await self.middleware_stack(scope, receive, send)
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\starlette\middleware\errors.py", line 181, in __call__    
    raise exc from None
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\starlette\middleware\errors.py", line 159, in __call__    
    await self.app(scope, receive, _send)
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\starlette\middleware\base.py", line 25, in __call__       
    response = await self.dispatch_func(request, self.call_next)
  File ".\app\main.py", line 50, in log_requests
    response = await call_next(request)
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\starlette\middleware\base.py", line 45, in call_next      
    task.result()
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\starlette\middleware\base.py", line 38, in coro
    await self.app(scope, receive, send)
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\starlette\middleware\cors.py", line 78, in __call__
    await self.app(scope, receive, send)
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\starlette\exceptions.py", line 82, in __call__
    raise exc from None
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\starlette\exceptions.py", line 71, in __call__
    await self.app(scope, receive, sender)
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\starlette\routing.py", line 566, in __call__
    await route.handle(scope, receive, send)
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\starlette\routing.py", line 227, in handle
    await self.app(scope, receive, send)
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\starlette\routing.py", line 41, in app
    response = await func(request)
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\fastapi\applications.py", line 128, in openapi
    return JSONResponse(self.openapi())
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\fastapi\applications.py", line 106, in openapi
    self.openapi_schema = get_openapi(
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\fastapi\openapi\utils.py", line 343, in get_openapi
    definitions = get_model_definitions(
  File "c:\users\aditya.shanbhog\appdata\local\programs\python\python38-32\lib\site-packages\fastapi\utils.py", line 28, in get_model_definitions
    model_name = model_name_map[model]
KeyError: