Getting 422 Unprocessable Entity when uploading file with fastapi

Question

I'm trying to receive image file for my FastAPI file, upload it to a server and then Save url in database.

My create_product and create_category endpoint works as expected without the file: UploadFile = File(...) passed to the router function

I could successfully upload files with other routes and get their filename but not with the above mentioned routes

Routes:

@router.post('/category/create', response_model=schemas.CategoryOut)
def create_category(*, request: schemas.CategoryIn,  file: UploadFile = File(...),  db: Session = Depends(get_db), current_user: schemas.UserOut = Depends(get_current_active_user)):
    category = storeview.get_category_by_slug(db, request.slug)
    if category:
        raise HTTPException(status.HTTP_400_BAD_REQUEST,
                            detail=f"Category with slug {request.slug} already exists!")
    request.image = storeview.save_file(file)
    return storeview.create_category(db, request)


@router.post('/product/create', response_model=schemas.Product)
async def create_product(*, file: UploadFile = File(...), request: schemas.ProductIn, category_id: int,  db: Session = Depends(get_db), current_user: schemas.UserOut = Depends(get_current_active_user)):
    product = storeview.get_category_by_slug(db, request.slug)
    if product:
        raise HTTPException(status.HTTP_400_BAD_REQUEST,
                            detail=f"Product with slug {request.slug} already exists!")
    request.image = storeview.save_file(file)
    return storeview.create_product(db, request, category_id)

Views:

def create_category(db: Session, request: schemas.CategoryIn):
    new_category = models.Category(
        name=request.name, slug=request.slug, image=request.image)
    db.add(new_category)
    db.commit()
    db.refresh(new_category)
    return new_category


def create_product(db: Session, request: schemas.ProductIn, category_id: int):
    new_product = models.Product(**request.dict(), category_id=category_id)
    db.add(new_product)
    db.commit()
    db.refresh(new_product)
    return new_product


def save_file(file: UploadFile = File(...)):
    result = cloudinary.uploader.upload(file.file)
    url = result.get("url")
    return url

Schemas:

class CategoryBase(BaseModel):
    name: str
    slug: str
    image: str


class Category(CategoryBase):
    id: int

    class Config:
        orm_mode = True


class CategoryIn(CategoryBase):
    pass


class ProductBase(BaseModel):
    name: str
    description: Optional[str] = None
    price: float
    image: str
    slug: str


class Product(ProductBase):
    id: int
    category_id: int
    category: Category

    class Config:
        orm_mode = True


class ProductIn(ProductBase):
    pass


class CategoryOut(CategoryBase):
    products: List[Product] = []
    id: int

    class Config:
        orm_mode = True