I'm very new to FastAPI. I have a request which looks something like this:
@router.post("/", response_model=EducationInResp)
async def create_Education_account(
education_in: EducationCreation,
current_user=Depends(get_current_user),
has_perm=Depends(user_has_create_perms),
):
Now, the EducationCreation data model has a field called customer_id. I want to check if the customer_id exists in the database. Now, I know that I can manually do that within the function itself and it is not recommended to do database related validation in Schema. Is there any way to check if the customer_id exists in the database using dependencies? Is there something like this:
async def check_customer_exist(some_val):
# some operation here to check and raise exception
@router.post("/", response_model=EducationInResp)
async def create_Education_account(
education_in: EducationCreation = Depends(check_customer_exist),
current_user=Depends(get_current_user),
has_perm=Depends(user_has_create_perms),
):
You could do that by declaring the parameter in the dependency function, as described in this answer. If the customer_id exists in the database, then return the data to the endpoint. If not, you could then raise an HTTPException, or handle it as desired.
from fastapi.exceptions import HTTPException
customer_ids = [1, 2, 3]
async def check_customer_exists(ec: EducationCreation):
# check if the customer_id exists in the database.
if ec.customer_id not in customer_ids:
raise HTTPException(status_code=404, detail="Customer ID not found")
else:
return ec
@router.post("/")
async def create(ec: EducationCreation = Depends(check_customer_exists)):
pass
If you would like specifying global dependencies for every endpoint in the router/app instance and would like to pass data from dependencies to the endpoint, please have a look here, as well as here and here on how to do that.