我需要用django处理一些JSON数据。 我将收到以下数据:
{
"user": 8,
"orderDay": "2020-06-24",
"deliveryDay": "2020-06-30",
"deliveryAddress": "Place des Fêtes",
"comment": "",
"orderDetail":
[
{
"product": 2,
"byProduct": 2,
"quantity": 43
},
{
"product": 3,
"byProduct": 3,
"quantity": 5
}
]
}
我想将此数据保存在3个不同的表中:order和orderDetail。 型号.py:
class order(models.Model):
user = models.ForeignKey(memberArea, on_delete=models.CASCADE)
comment = models.TextField(null=True, blank=True)
orderDay = models.DateTimeField(auto_now_add=True)
deliveryDay = models.DateField()
deliveryPlace = models.CharField(max_length=255)
state = models.CharField(max_length=255)
price = models.TextField(null=True, blank=True)
response = models.TextField(null=True, blank=True)
...
class orderDetail(models.Model):
order = models.ForeignKey(order, on_delete=models.CASCADE)
product = models.ForeignKey(product, on_delete=models.CASCADE)
byProduct = models.ManyToManyField(byProduct)
quantity = models.CharField(max_length=255)
...
class byProduct(models.Model):
product = models.ForeignKey(product, on_delete = models.CASCADE)
name = models.CharField(max_length=255)
...
class product(models.Model):
name = models.CharField(max_length=255)
prix_uni = models.TextField(null=True, blank=True)
prix_kg = models.TextField(null=True, blank=True)
dispo = models.BooleanField(null=True, blank=True)
category = models.ForeignKey(category, on_delete=models.CASCADE)
redu = models.TextField(null=True, blank=True)
我没有找到任何关于如何使用Django处理JSON数据的好文档。 提前感谢
更新
我试过这样的方法: serializer.py:
class ProductSerializer(serializers.ModelSerializer):
class Meta:
model = product
fields = '__all__'
class ByProductSerializer(serializers.ModelSerializer):
class Meta:
model = byProduct
fields = '__all__'
class orderDetailSerializer(serializers.ModelSerializer):
order = serializers.PrimaryKeyRelatedField(many=False, queryset=order.objects.all())
class Meta:
model = orderDetail
fields = '__all__'
class OrderSerializer(serializers.ModelSerializer):
orderDetail = orderDetailSerializer(many=True)
class Meta:
model = order
fields = ['user', 'comment', 'deliveryDay', 'deliveryAddress', 'orderDetail']
def create(self, validated_data):
order_detail_data = validated_data.pop('orderDetail')
new_order = order.objects.create(**validated_data)
new_order.save()
for product in order_detail_data:
order_detail = orderDetail.objects.create(**product)
order_detail.order.add(new_order.id)
return new_order
views.py:
@api_view(['POST'])
def order(request, format=None):
if request.method == 'POST':
serializer = OrderSerializer(data=request.data)
data = {}
if serializer.is_valid():
serializer.save()
data['response'] = "Your order went well"
return Response(data)
return Response(serializer.errors)
您需要做的更改很少
byProduct
是一个ManyToMany
字段,因此它必须有一个产品列表orderDetailSerializer
中:注意,在
fields
中,我没有包括order
,因为在我们的数据中没有这样的字段,因此出现了错误order field is required
。这很简单,因为序列化程序将解析我们发送的数据,如果缺少什么,它将通知我们orderSerializer
:需要注意的是,
fields
包括orderDetail
,尽管它不是order
模型的一部分,但是为了解析传递的数据,如果有更多字段,我们需要添加这些字段。在create
方法byProduct
中有一个ManyToMany
字段,因此我们必须使用set()
方法来分配它们,不允许使用direct assignment
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