I would like to ask, if it's possible to create a response with related data from a second model? For example:
models.py
class Manufacturer(models.Model):
name = models.CharField(max_length=100, null=False, blank=False, unique=True)
date_created = models.DateTimeField(auto_now_add=True)
class Car(models.Model):
manufacturer = models.ForeignKey(Manufacturer, null=False, blank=False, on_delete=models.CASCADE)
name = models.CharField(max_length=100, null=False, blank=False)
date_created = models.DateTimeField(auto_now_add=True)
serializers.py
class ManufacturerSerializer(ModelSerializer):
class Meta:
model = Manufacturer
exclude = [
'date_created',
]
class CarSerializer(ModelSerializer):
class Meta:
model = Car
exclude = [
'date_created',
]
views.py
@api_view(['GET'])
def api_list_manufacturer(request):
qs = Manufacturer.objects.all()
serializer = ManufacturerSerializer(qs, many=True)
return Response(serializer.data)
@api_view(['GET'])
def api_list_card(request):
qs = Car.objects.all()
serializer = CarSerializer(qs, many=True)
return Response(serializer.data)
Right know I'm using the fetch-method to receive the data for the Car...
fetch(url)
.then(response => response.json)
.then(function(data) {
console.log(data);
});
...and the data looks like this:
0: {id: 1, name: 'Focus', manufacturer: 1},
1: {id: 2, name: 'F-150', manufacturer: 1},
2: {id: 3, name: 'Model S', manufacturer: 2}
My question:
Is it possible to get - for example - the name of the manufacturer into my response? Something like this?
0: {id: 1, name: 'Focus', manufacturer: 1, manufacturer__name: 'Ford'},
1: {id: 2, name: 'F-150', manufacturer: 1, manufacturer__name: 'Ford'},
2: {id: 3, name: 'Model S', manufacturer: 2, manufacturer__name: 'Tesla'}
Thanks for all your help and have a great sunday!
Use SerializerMethodField. This is a read-only field. It gets its value by calling a method on the serializer class it is attached to. It can be used to add any sort of data to the serialized representation of your object
Inside serializers.py add:
from rest_framework.serializers import SerializerMethodField
class CarSerializer(ModelSerializer):
manufacturer__name = SerializerMethodField(help_text="Name of the Car Manufacturer")
class Meta:
model = Car
fields = [
'id',
'name',
'manufacturer',
'manufacturer__name',
]
def get_manufacturer__name(self, instance: Car):
return instance.manufacturer.name
Ok,
so I found the solution! Inside my serializers.py I changed the one for the car into this:
class CarSerializer(ModelSerializer):
manufacturer_name = CharField(source='manufacturer.name')
class Meta:
model = Car
exclude = [
'date_created',
]