I've got established a relationship between 2 models: Order and OrderLine.
I've created serializers for both of them following the DRF documentation,
yet when printing the serializer.data the nested objects don't show.
Here are my models:
class Order(models.Model): id = models.UUIDField(primary_key=True,
default=uuid.uuid4, editable=False) session_id =
models.CharField(max_length=256) class OrderLine(models.Model): order_id =
models.ForeignKey(Order, on_delete=models.DO_NOTHING) product_id =
models.ForeignKey(Product, on_delete=models.DO_NOTHING) price =
models.DecimalField(decimal_places=2, max_digits=20) quantity =
models.IntegerField() total = models.DecimalField(decimal_places=2,
max_digits=20) created_at = models.DateField(auto_now_add=True) updated_at
= models.DateField(auto_now=True)
These are the serializers:
from rest_framework import serializers from .models import Order, OrderLine
class OrderLineSerializer(serializers.ModelSerializer): """ OrderLine
serializer """ class Meta: model = OrderLine fields = ['product_id',
'price', 'quantity', 'total'] class
OrderSerializer(serializers.ModelSerializer): """ Order serializer """
items = OrderLineSerializer(many=True, read_only=True) class Meta: model =
Order fields = ['session_id', 'subtotal', 'total', 'items']
read_only_fields = ['id']
and this is the view:
class OrderAPIViewSet(viewsets.ViewSet): def create(self, request): order =
Order.objects.create(session_id=request.data['session_id']) for item in
request.data['items']: product = Product.objects.get(pk=item['product_id'])
total = Decimal(item['price'] * item['quantity']) OrderLine.objects.create(
order_id=order, product_id=product, price=Decimal(item['price']),
quantity=item['quantity'], total=total ) serializer =
OrderSerializer(instance=order) print("HERE") print(serializer.data) return
Response(status=status.HTTP_200_OK)
>From my REST client I'm posting the following object:
{ "session_id":uuid, "items": [ { "product_id": product.id, "price": 5.80,
"quantity": 2, } ] }
but when the print statement in the view is executed this is what's being
printed:
{ "session_id":"4def7bdb-dedb-46aa-9c70-1d9e4f522149", "subtotal":"0.00",
"total":"0.00" }
notice the the items subresource is not being included.
What am i missing?
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