[Python] Contacts matching query does not exist in Django rest framework

I am trying to update Contact model fields while creating the new fields of UpdateInfo model and add them to the existing model.

But I am getting this error

contacts.models.Contacts.DoesNotExist: Contacts matching query does not exist.
​

I know the contact object with the id 19 exists because I can see it when I try the get contacts API.

I am sending data like this:



My models:

class Contacts(models.Model):
full_name = models.CharField(max_length=100, blank=True)
.........

def __str__(self):
return self.full_name

class Meta:
verbose_name_plural = 'Potential Clients'



class UpdateInfo(models.Model):
contacts = models.ForeignKey(Contacts,on_delete=models.CASCADE, related_name='update_info')
updated_at = models.DateTimeField(auto_now=True)
modified_by = models.CharField(max_length=100, blank=True)


def __str__(self):
return f"Last modified by {self.modified_by} at {self.updated_at}"


My views:

class EditContactView(RetrieveUpdateDestroyAPIView):
permission_classes = [IsAuthenticated]
queryset = Contacts.objects.all()
serializer_class = ContactsUpdateSeializer


My serializers:

class UpdateInfoSerializer(serializers.ModelSerializer):
contacts= serializers.PrimaryKeyRelatedField(read_only=True)
class Meta:
model = UpdateInfo
fields = ['id','contacts','updated_at','modified_by']


class ContactsUpdateSeializer(serializers.ModelSerializer):
update_info = UpdateInfoSerializer(many=True)
id = serializers.PrimaryKeyRelatedField(read_only=True)
class Meta:
model = Contacts
fields = ['id', 'full_name', 'lead_source', 'email', 'phone', 'contact_owner',
'contact_status', 'company_name', 'job_position', 'tasks',
'notes', 'email_list', 'created_by', 'created_at', 'update_info']


def update(self, instance, validated_data):
update_data = validated_data.pop('update_info')
id = validated_data.get('id')
contacts = Contacts.objects.get(id=id)
#contacts.save()

#contact_only_update_logic
instance.full_name = validated_data.get('full_name')
instance.lead_source = validated_data.get('lead_source')
instance.email = validated_data.get('email')
instance.phone = validated_data.get('phone')
instance.contact_owner = validated_data.get('contact_owner')
instance.contact_status = validated_data.get('contact_status')
instance.company_name = validated_data.get('company_name')
instance.job_position = validated_data.get('job_position')
instance.tasks = validated_data.get('tasks')
instance.notes = validated_data.get('notes')
instance.email_list = validated_data.get('email_list')
instance.save()

#add_update_info_logic

for update_data in update_data:
abc = UpdateInfo.objects.create(contacts=contacts,**update_data)
instance.update_info.add(abc)

instance.save()
return instance

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