Serialize data to json formate using native serializer Django

Question

I have this dictionary which I need to pass to another view, knowing that possible ways of doing that are either through sessions or cache, now when I am trying to pass to session it is throwing me an error that data is not JSON serializable probably because I have DateTime fields inside this dictionary

  session_data = serializers.serialize('json',session_data)

error on above statement

'str' object has no attribute '_meta'

updated date is somewhat in this format

{'city_name': 'Srinagar', 'description': 'few clouds', 'temp': 26.74, 'feels_like': 27.07, 'max_temp': 26.74, 'min_temp': 26.74, 'sunrise': datetime.time(6, 11, 10), 'sunset': datetime.time(18, 43, 59)}

You session_data seems to be a string already, not a model object. — willeM_ Van Onsem
– willeM_ Van Onsem, Commented Sep 11, 2021 at 7:37
not entirely it has some DateTime fields, it is a dictionary as I am passing it as a context to template as well — Atif Shafi
– Atif Shafi, Commented Sep 11, 2021 at 7:39
"dictionary" well there is your problem, serializers.serialize is supposed to be passed either a queryset or an iterable of model instances. — Abdul Aziz Barkat
– Abdul Aziz Barkat, Commented Sep 11, 2021 at 7:40
is there any way out of using any kind of serializer, or do i have to manually make changes because there is a lot of data and the process is tedious — Atif Shafi
– Atif Shafi, Commented Sep 11, 2021 at 7:42

willeM_ Van Onsem · Accepted Answer · 2023-11-21 10:38:04Z

3

Your session_data is already a dictionary. Since Django's serializer focuses on serializing an iterable of model object, that thus will not work.

You can make use of Django's DjangoJSONEncoder ^[Django-doc] to serialize Python objects that include date, datetime, time and/or timedelta objects.

You thus can work with:

from django.core.serializers.json import DjangoJSONEncoder

encoder = DjangoJSONEncoder()
session_data = encoder.encode(session_data)

If you plan to return a JSON blob as a HTTP response, you can simply let the JsonResponse do the encoding work:

from django.http import JsonResponse

# …
return JsonResponse(session_data)

edited Nov 21, 2023 at 10:38

answered Sep 11, 2021 at 7:48

willeM_ Van Onsem

482k33 gold badges483 silver badges624 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Serialize data to json formate using native serializer Django

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related