DRF - Define 'mandatory' fields in request

Question

I was looking at documentation but I am maybe missing something. If I want to receive certain fields in the request's data, how can I define them? I'd like to avoid the POST or GET method to be executed if the complete fields are not in the request's data.

Example:

I need to receive (application/json):

{ "city": "Port Orange", "state": "FL", "formatted_address": "Peach Blossom Blvd 5329", "_zip": "32128" }

But if I get only

{ "city": "Port Orange", "state": "FL", "formatted_address": "Peach Blossom Blvd 5329" }

I'd like return a Response with an error message 400 Bad Request. But without executing the POST method. How could I do this?

PS. I am using APIView

I am able to access the JSON string in the dispatch method using request.body — utkbansal
– utkbansal, Commented Nov 17, 2015 at 17:10
Yes, but it's a string, not a dict. But I think I could give it a try. — Gocht
– Gocht, Commented Nov 17, 2015 at 17:11
As you can see in one of my previous questions (linked before in comments) I realized that, I will give it a try and let you know. — Gocht
– Gocht, Commented Nov 17, 2015 at 17:26
@Gocht You can add a _zip field to your serializer. If the field is not supplied in the request, serializer will become invalid and will automatically return a 400 response. — Rahul Gupta
– Rahul Gupta, Commented Nov 17, 2015 at 17:27

utkbansal · Accepted Answer · 2015-11-17 16:29:13Z

0

Do something like this

return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

In your view, return the serializer errors along with the correct status code from rest_framework.status

edited Nov 17, 2015 at 16:29

answered Nov 17, 2015 at 16:27

utkbansal

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8 Comments

Gocht Over a year ago

Thanks dude, but where? I'd like to avoid the POST or GET method to be executed if the complete fields are not in the request's data

utkbansal Over a year ago

In that case you will need to override the dispatch method of the APIView which is used to call the appropriate method according to request method.

Gocht Over a year ago

I tried that, and it's harder that I thought, please take a look at this previous questions: stackoverflow.com/questions/33745533/… and stackoverflow.com/questions/33740697/…

utkbansal Over a year ago

Why do you need to avoid the post method execution?

Gocht Over a year ago

I really want to avoid writing validation in every view or serializer, I'd like to write something like required_fields = {'field_a', 'field_b'} in every view class (outside the GET or POST). I usually use the dispatch method to do this when working with Django, and I did it, but I have just realized that it is not a good idea with DRF

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