3

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，因为我有两个模型账单和订单

 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 

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

创建了账单对象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？

4

2 回答 2

0

改变你的OrderSerializer

class OrderSerializer(EmbeddedDocumentSerializer):
   class Meta:
      model = Order
      fields = '__all__'
      read_only_fields = ('id',)
于 2018-02-27T06:51:29.197 回答
0

我能够通过如下更改 Bill Serializer 来使其工作

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:
            bill.orders.append(Order(**order))


        bill.save()

        return bill
于 2018-02-27T11:26:34.793 回答