Question

无法弄清为什么OPTIONS请求不包括可写的嵌套模型序列化器或其内部字段。

class CustomerProductsSerializer(serializers.ModelSerializer):
    id = serializers.IntegerField(read_only=True)
    description = serializers.ReadOnlyField(source='product.description')

    class Meta:
        model = CustomerTemplate
        fields = ('id', 'description', 'quantity', 'unit',)


class CustomerDetailSerializer(serializers.ModelSerializer):
    products = CustomerProductsSerializer(
        source='customertemplate_customer', many=True)

    class Meta:
        model = Customer
        fields = ('id', 'name', 'products')
        read_only_fields = ('id', 'name')

    def update(self, instance, validated_data):
        ...

OPTIONS请求的当前结果：

{
    "name": "Customer Instance",
    "description": "",
    "renders": [
        "application/json",
        "text/html"
    ],
    "parses": [
        "application/json",
        "application/x-www-form-urlencoded",
        "multipart/form-data"
    ],
    "actions": {
        "PUT": {
            "id": {
                "type": "integer",
                "required": false,
                "read_only": true,
                "label": "ID"
            },
            "name": {
                "type": "string",
                "required": false,
                "read_only": true,
                "label": "Name"
            }
        }
    }
}

OPTIONS请求的所需结果将包括products及其内部字段的详细信息：

"products" : {
    "type": "nested object",
    "required": false,
    "read_only": false,
    "children": {
        ...
    }
}

如何将products字段及其内部字段添加到元数据？

根据此comment chain的支持，已有一段时间了。

Answer 1

我正在使用mixin在一个视图集上允许多个序列化器。

class MultiSerializerMixin(object):
    def get_serializer_class(self):
        if self.action in self.serializers:
            return self.serializers.get(self.action, None)
        else:
            return super(MultiSerializerMixin, self).get_serializer_class()

我在视图集中包括了一个字典，以确定要使用哪个序列化器

serializers = {
    'list': CustomerListSerializer,
    'retrieve': CustomerDetailSerializer,
    'update': CustomerDetailSerializer,
    'partial_update': CustomerDetailSerializer,
}

OPTIONS请求使用基本元数据类SimpleMetadata。调用SimpleMetadata().determine_actions()时，串行器由view.get_serializer()确定，它返回了错误的串行器，并为我提供了GET而不是PUT的所有操作。

DRF嵌套模型序列化器未包含在元数据中

1 个答案: