create multiple related object with Django REST Framework - django

Question

I'm using Djago 2.0 and Django REST Framework
I have following model classes for contacts/models.py
class Contact(models.Model):
user = models.ForeignKey(User, on_delete=models.CASCADE)
first_name = models.CharField(max_length=100)
last_name = models.CharField(max_length=100, blank=True, null=True)
date_of_birth = models.DateField(blank=True, null=True)
class ContactPhoneNumber(models.Model):
contact = models.ForeignKey(Contact, on_delete=models.CASCADE)
phone = models.CharField(max_length=100)
primary = models.BooleanField(default=False)
contacts/views.py
class ContactViewSet(viewsets.ModelViewSet):
serializer_class = ContactSerializer
permission_classes = (IsAuthenticated, AdminAuthenticationPermission,)
def get_queryset(self):
return Contact.objects.filter(user=self.request.user)
def perform_create(self, serializer):
serializer.save(user_id=self.request.user)
and contacts/serializers.py is defined as
class ContactPhoneNumberSerializer(serializers.ModelSerializer):
class Meta:
model = ContactPhoneNumber
fields = ('id', 'phone', 'primary', 'created', 'modified')
class ContactSerializer(serializers.HyperlinkedModelSerializer):
phone_numbers = ContactPhoneNumberSerializer(source='contactphonenumber_set', many=True)
user = serializers.CurrentUserDefault()
class Meta:
model = Contact
fields = ('url', 'id', 'first_name', 'last_name', 'date_of_birth', 'phone_numbers')
def create(self, validated_data):
phone_numbers = validated_data.pop('contactphonenumber_set')
user = validated_data.pop('user_id')
instance = Contact.objects.create(
user=user,
**validated_data
)
for phone_data in phone_numbers:
ContactPhoneNumber.objects.create(contact=instance, **phone_data)
return instance
I want to be able to create multiple phone_number instances with new contact object.
How can I pass multiple phone_numbers with fields phone, primary along with contact data?

Answer 1

Your JSON Post body needs to look like this:
{
"user": 1,
"first_name": "Anuj",
"last_name": "TBE",
"date_of_birth": "1990-01-01",
"contactphonenumber_set": [
{
"phone": "[phone]",
"primary": false
},
{
"phone": "[phone]",
"primary": true
}
]
}
Do think about how you want to deal with duplicates in this context.