django - 提供给 EmbeddedDocumentField 的嵌入式文档实例无效

Question

我目前正在开发一个计费应用程序，并且需要在账单中包含订单，因为我有以下两个模型 Bill 和 orders

 class Bill(Document):
    billNo = IntField(unique=True, blank=False)
    table = ReferenceField('Table',reverse_delete_rule=1)
    orders = EmbeddedDocumentListField('Order', required = False)
    total = models.FloatField()
    discount = models.FloatField(blank=True)
    grandtotal = models.FloatField()
    payment_option =  ReferenceField('PaymentOption',reverse_delete_rule=1)
    paid = models.BooleanField(default=False)

class Order(EmbeddedDocument):
   food = ReferenceField(Food)
   quantity = IntField(required = True)
   complementory = BooleanField(default = False)

他们的序列化器是

class OrderSerializer(EmbeddedDocumentSerializer):
   class Meta:
      model = Order
      fields = 'all'
      read_only_fields = ('id',)

class BillSerializer(DocumentSerializer):
   orders = OrderSerializer(many = True)
   class Meta:
       model = Bill
       fields = '__all__'
       read_only_fields = ('id',)

  def create(self, validated_data):
      orders = validated_data.pop('orders')
      bill = Bill.objects.create(**validated_data)
      bill.orders = []

      for order in orders:
          print(order)
          bill.orders.append(order)
      bill.save()
      return bill

但是每当我传递一个像

这样的 json 时

{
"billNo": "4",
"table":"5a93eb7f59951a3320a0b4d8",
"payment_option":"5a93eddf59951a2fd4dbabe9",
"orders":[{
 "food":"5a93c2c759951a018c5e18b5",
 "quantity":"2",
 "complementory":"False"
}]
}

账单对象已创建但未添加订单并给出错误

mongoengine.errors.ValidationError: ValidationError           (Bill:5a94f76859951a19d4688aeb) 
(Invalid embedded document instance provided to an EmbeddedDocumentField: ['orders'])

我正在使用 django rest 框架，因为它是 mongodb，所以我正在使用 django rest 框架 mongo 引擎。实际错误是什么，我该怎么办？

Answer 1

改变你的OrderSerializer

class OrderSerializer(EmbeddedDocumentSerializer):
   class Meta:
      model = Order
      fields = '__all__'
      read_only_fields = ('id',)