有条件地选择序列化器

Question

我有三个 Django 模型。

class Asset(models.Model):
  name = models.CharField(max_length=255)


class Place(Asset):
  location = PointField()


class Zone(Asset):
  location = PolygonField()

我想对 Place 和 Zone 使用相同的端点。是否可以为每个请求决定使用哪个序列化程序，例如我可以轻松检查请求的资产是地点还是区域？

我只对处理单个实例感兴趣，因此不需要处理 ListView 等

Answer 1

您可以在您的视图中重写 get_serializer_class 方法，并在其中添加决定正确序列化程序的逻辑。

根据 DRF docs:

get_serializer_class(self)

Returns the class that should be used for the serializer. Defaults to returning the serializer_class attribute.

May be overridden to provide dynamic behavior, such as using different serializers for read and write operations, or providing different serializers to different types of users.

代码：

class MyView(..):
    ...

    def get_serializer_class(self):
        if asset == place: # here add the logic to decide the asset type
             return PlaceSerializer 
        return ZoneSerializer

有条件地选择序列化器

Conditionally choose serializer

django

django-rest-framework

django-rest-framework-gis