我正在使用 Django 2.2 和 Django REST Framework 。
我必须为同一模型使用序列化器。
class OrderListSerializer(serializers.ModelSerializer):
plan = PlanBaseSerializer(read_only=True, many=False)
class Meta:
model = Order
fields = [
'id', 'name', 'plan', 'pricing',
'created', 'completed',
]
class OrderCreateSerializer(serializers.ModelSerializer):
plan_pricing = serializers.IntegerField(required=True, write_only=True)
class Meta:
model = Order
fields = [
'plan_pricing'
]
def create(self, validated_data):
plan_pricing_ = validated_data.pop('plan_pricing', None)
try:
plan_pricing = PlanPricing.objects.get(pk=plan_pricing_)
except PlanPricing.DoesNotExists:
raise ValidationError('Plan pricing not available')
validated_data['plan'] = plan_pricing.plan
validated_data['amount'] = plan_pricing.price
return super().create(validated_data)
OrderListSerializer
序列化程序用于列出订单或订单明细视图,OrderCreateSerializer
用于创建新的订单实例。
视图是
class CreateOrderView(generics.CreateAPIView):
serializer_class = OrderCreateSerializer
def perform_create(self, serializer):
serializer.save(user=self.request.user)
这很好,因为订单对象正在按预期方式创建。但是返回的值不包含任何数据。
我要在创建订单后使用OrderListSerializer
呈现保存的订单详细信息。
创建对象后如何更改序列化程序类?
此外,在对象成功创建后,我还必须触发信号。 触发信号的最佳位置是什么?
答案 0 :(得分:2)
如下更改 CreateOrderView
,
class CreateOrderView(generics.CreateAPIView):
serializer_class = OrderCreateSerializer
def perform_create(self, serializer):
return serializer.save(user=self.request.user)
def create(self, request, *args, **kwargs):
serializer = self.get_serializer(data=request.data)
serializer.is_valid(raise_exception=True)
instance = self.perform_create(serializer)
instance_serializer = OrderListSerializer(instance)
return Response(instance_serializer.data)
serializer.save()
返回刚刚创建或更新的实例。因此,我们使用这种方式传递给OrderListSerializer
并返回相应的响应。
答案 1 :(得分:0)
您可以在这里使用几种方法。首先,
class CreateOrderView(generics.ListCreateAPIView):
serializer_class = OrderCreateSerializer
def perform_create(self, serializer):
serializer.save(user=self.request.user)
def list(self, *args, **kwargs):
serializer_class = OrderListSerializer
serializer = serializer_class(self.get_queryset())
return Response(serializer.data)
替代方法是条件if语句,其中
if self.request.method=='POST':
self.serializer_class = OrderCreateSerializer
elif self.request.method=='GET':
self.serializer_class = OrderListSerializer
答案 2 :(得分:0)
您可以覆盖create()
,然后返回所需的任何内容:
from rest_framework import response, status
(...)
def create(self, request, *args, **kwargs):
super().create(request, *args, **kwargs)
return response.Response(status=status.HTTP_201_CREATED)
(...)