attributeerror: this querydict instance is immutable rest framework

AttributeError: This QueryDict instance is immutable django

#views.py
from rest_framework import generics


class Login(generics.CreateAPIView):
    serializer_class = MySerializerClass
    def create(self, request, *args, **kwargs):
        request.data._mutable = True
        request.data['username'] = "[email protected]"
        request.data._mutable = False

#serializes.py
from rest_framework import serializers


class MySerializerClass(serializers.Serializer):
    username = serializers.CharField(required=False)
    password = serializers.CharField(required=False)
    class Meta:
        fields = ('username', 'password')

Posted by: Guest on August-14-2021

Source

You can convert it to a mutable QueryDict instance by copying it: request.GET = request.GET.copy() Afterwards you'll be able to modify the QueryDict: >>> from django.test.client import RequestFactory >>> request = RequestFactory().get('/') >>> request.GET <QueryDict: {}> >>> request.GET['foo'] = 'bar' AttributeError: This QueryDict instance is immutable >>> request.GET = request.GET.copy() <QueryDict: {}> >>> request.GET['foo'] = 'bar' >>> request.GET <QueryDict: {'foo': 'bar'}>

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