我有一个BaseModel类:
class BaseModel(models.Model):
title = models.CharField(max_length=250, blank=True, null=True)
class Meta:
abstract = True
然后我有多个扩展此类的模型类,例如:
class Article(BaseModel):
slug = models.SlugField(max_length=250, default=timezone.now, unique=True)
我的目标是在通过我的Web服务返回的JSON对象中具有一个字段,以指示对象的类型(以便客户端应用程序可以轻松地从电子商务产品中告知商品)。类似于以下内容:
{
"id": 1,
"object_type: "article",
"title": "some article",
"slug": "some-article"
}
我想可能会有一个类似于以下内容的BaseModelSerializer类:
class BaseModelSerializer(serializers.ModelSerializer):
object_type = self.__class__.__name__ # ??? how to get the name/ label of the child class?
然后,我可以使用ArticleSerializer扩展BaseModelSerializer,如下所示:
class ArticleSerializer(BaseModelSerializer):
class Meta:
model = Article
如果可以通过修改BaseModel类来实现这一点,我将感到高兴。类似于以下内容?
class BaseModel(models.Model):
title = models.CharField(max_length=250, blank=True, null=True)
object_type = self.__class__.__name__ # ??? how to get the name/ label of the child class?
class Meta:
abstract = True
最佳答案
class BaseModelSerializer(serializers.ModelSerializer):
object_type = serializers.SerializerMethodField()
def get_object_type(obj):
return obj.__class__.__name__.lower()
class ArticleSerializer(BaseModelSerializer):
class Meta:
model = Article
fields = ('object_type',)