I'm using a NullBooleanField and when I define it in the model I set n

yes

I just realized what was hapenning, Thanks awesome bro

If you have any doubt about the code please let me know. Thanks!

# file models.py from django.db import models from django.core.validators import MaxValueValidator, MinValueValidator class Client(models.Model): """ Client class """ client_id = models.PositiveIntegerField(primary_key=True, validators=[MinValueValidator(1000000), MaxValueValidator(999999999999)] ) created_at = models.DateTimeField(auto_now_add=True) updated_at = models.DateTimeField(auto_now=True) profile_picture = models.ImageField(null=True) picture_id = models.ImageField(null=True) authenticated = models.NullBooleanField() class Meta: db_table = 'api_clients' ################################################################################# # file views.py class ClientAPIView(viewsets.ModelViewSet): ''' Endpoint to manage object Clients ''' parser_classes = (MultiPartParser, FormParser) queryset = Client.objects.all() serializer_class = ClientSerializer def retrieve(self, request, *args, **kwargs): client = self.get_object() if (client.profile_picture and client.picture_id and client.authenticated is None): result = verify_faces(client.profile_picture.name, # This fuction returns True or False client.picture_id.name) setattr(client, 'authenticated', result) serializer = self.get_serializer(client) print(client.authenticated) return Response(serializer.data, status=status.HTTP_200_OK)

Ok. Can you please post your class/function ?

Yes, I only define the field like authenticated = NullBooleanField() and in my get method I assign it a value (True or False) but When I see my DataBase this field is Null yet.

This field use null=True by default. Is like BooleanField(null=True). So, what are you trying to do?