Django REST Framework - pass related field in POST data - django

Question

I'm using Django 2.0 and Django REST Framework
I have a model to store contact's address like
class ContactAddress(models.Model):
contact = models.ForeignKey(Contact, on_delete=models.CASCADE)
city = models.CharField(max_length=250)
postal = models.CharField(max_length=6)
state = models.ForeignKey(State, on_delete=models.PROTECT, blank=True)
I have two more models to store state and country
class Country(models.Model):
name = models.CharField(max_length=100, unique=True, verbose_name='Country Name')
class State(models.Model):
country = models.ForeignKey(Country, on_delete=models.PROTECT)
name = models.CharField(max_length=100, verbose_name='State Name')
I want to pass state field with POST data while creating a new address record
app/serializers.py
class ContactAddressSerializer(serializers.ModelSerializer):
class Meta:
model = ContactAddress
depth = 2
fields = (
'id', 'city', 'postal', 'state'
)
def create(self, validated_data):
print(validated_data)
and my POST data
[
{
"city": "City Name",
"postal": "110011",
"state": "Bihar"
}
]
But there is no state data in validated data. Printing validate_data return
def create(self, validated_data):
print(validated_data)
{'city': 'City Name', 'postal': '110011', 'contact': <Contact: contact_object>}
How can I pass POST data for related field?

Answer 1

state property has foreign key to another model. If you want to use state property in serializer class, cannot behave like simple property
First, write a serializer for state model, then use this serializer class in contact address class
class StateSerializer(serializers.ModelSerializer):
class meta:
Fields = ('name')
class ContactAddressSerializer(serializers.ModelSerializer):
state = StateSerializer()
class Meta:
model = ContactAddress
depth = 2
fields = (
'id', 'city', 'postal', 'state'
)
def create(self, validated_data):
print(validated_data)