I have a model like this:

 class Cart(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid4)
    customer = models.ForeignKey(Customer, on_delete=models.CASCADE, null=True)


class Reception(models.Model):
    PAYMENT_STATUS_PENDING = 'P'
    PAYMENT_STATUS_COMPLETE = 'C'
    PAYMENT_STATUS_FAILED = 'F'
    PAYMENT_STATUS_CHOICES = [
        (PAYMENT_STATUS_PENDING, 'Pending'),
        (PAYMENT_STATUS_COMPLETE, 'Complete'),
        (PAYMENT_STATUS_FAILED, 'Failed')
    ]
    cart = models.ForeignKey(Cart, on_delete=models.CASCADE, null=True)
    customer = models.ForeignKey(Customer, on_delete=models.CASCADE)
    entry_date = models.DateField()
    total_price = models.IntegerField()
    payment_status = models.CharField(
        max_length=1,
        choices=PAYMENT_STATUS_CHOICES,
        default=PAYMENT_STATUS_PENDING
    )

My question is: How can I get a particular Cart record from the Reception model? I tried using this serializer:

class ReceptionSerializer(serializers.ModelSerializer):
    class Meta:
        model = Reception
        fields = ['id', 'customer', 'entry_date', 'payment_status', 'cart']

but it only returns the id of a cart. I want to return the whole object of that specific cart. How can I do that?

CodePudding user response：

If you want to utilize nested serialization, one possible solution would be to define CartSerializer and override the cart field of the ReceptionSerializer class as follows

class CartSerializer(serializers.ModelSerializer):
    class Meta:
        model = Cart
        fields = ['id', 'customer']

class ReceptionSerializer(serializers.ModelSerializer):
    cart = CartSerializer(many=True)
    
    class Meta:
        model = Reception
        fields = ['id', 'customer', 'entry_date', 'payment_status', 'cart']

However, please note that the cart field will become read-only this way.