Django rest framework: Insert multiple objects in one post request

Question

I am using DRF for my API backend. I need to insert multiple objects into one post request. I saw so many tutorials, as well How do I create multiple model instances with Django Rest Framework?, but not success. I am using ModelSerializer, but when using many=True then have problem with ListSerializer.

views.py

class SaleUserViewSet(ModelViewSet):
    queryset = SaleUser.objects.all()
    serializer_class = SaleUserSerializer(many=True)

serlializers.py

class SaleUserSerializer(serializers.ModelSerializer):

    class Meta:
        model = SaleUser
        fields = ('id', 'comment', 'creation_date', 'modification_date', 'last_user', 'user', 'sale', 'user_sale_type')

error message

AttributeError at /api/sale_user/ type object 'Meta' has no attribute 'model'

Please advise.

Welcome to the stackoverflow. hi, add your code and error trace, please. — user8060120
– user8060120, Commented Aug 10, 2017 at 7:56
Thank you Bear, I edited my question with code and error message. — Nenad Živanović
– Nenad Živanović, Commented Aug 10, 2017 at 8:10

score 11 · Accepted Answer · 2021-03-05 06:54:14Z

11

rollback serializer to your default

class SaleUserSerializer(serializers.ModelSerializer):

    class Meta:
        model = SaleUser
        fields = (
            'id',
            'comment',
            'creation_date',
            'modification_date',
            'last_user',
            'user',
            'sale',
            'user_sale_type'
        )

and override view to it:

from rest_framework.response import Response    

class SaleUserViewSet(ModelViewSet):
    queryset = SaleUser.objects.all()
    serializer_class = SaleUserSerializer

    def create(self, request, *args, **kwargs):
        data = request.data.get('items', request.data)
        many = isinstance(data, list)
        print (data, many)
        serializer = self.get_serializer(data=data, many=many)
        serializer.is_valid(raise_exception=True)
        self.perform_create(serializer)
        headers = self.get_success_headers(serializer.data)
        return Response(
                serializer.data,
                status=status.HTTP_201_CREATED,
                headers=headers
        )

edited Mar 5, 2021 at 6:54

answered Aug 10, 2017 at 9:46

user8060120

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10 Comments

Nenad Živanović Over a year ago

I rewrite data = request.data.get("items") if 'items' in request.data else data = request.data to ` if 'items' in request.data: data = request.data.get("items") else: data = request.data` because I get this error SyntaxError: can't assign to conditional expression With rewrited code still get error AssertionError at /api/sale_user/ Cannot call .is_valid()` as no data= keyword argument was passed when instantiating the serializer instance.`

user8060120 Over a year ago

i'm sorry, i fixed both troubles you may try again

Nenad Živanović Over a year ago

Ok, I tried again, now I have new error NameError at /api/sale_user/ name 'status' is not defined :(

user8060120 Over a year ago

it is good :) just add from rest_framework import status to your imports

user8060120 Over a year ago

@yaksh added the import to the answer, for other who will search the same

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