python - Django 结果返回绝对 URL

Question

所以我在 serializers.py

中有一个相当简单的序列化程序

class ScheduleSerializer(serializers.ModelSerializer):

    class Meta:
        model = FrozenSchedule
        fields = ['startDate', 'endDate', 'client', 'url']

    startDate = serializers.DateField(source='start_date')
    endDate = serializers.DateField(source='end_date')
    client = serializers.StringRelatedField(many=False)
    url = serializers.URLField(source='get_absolute_url')

get_absolute_url 在我的 models.py

def get_absolute_url(self):
    return reverse('reports:frozenschedule-detail', kwargs={
        'slug': self.client.slug, 'pk': self.id
    })

和viewsets.py中的ViewSet相关

class ScheduleViewSet(viewsets.ReadOnlyModelViewSet):
    queryset = FrozenSchedule.objects.not_abandoned().future()\
        .filter(signed=False).order_by('start_date')
    serializer_class = serializers.ScheduleSerializer

它返回如下所示的 JSON:

 [
    {
        "startDate": "2016-10-01",
        "endDate": null,
        "client": "Abscissa.Com Limited",
        "url": "/clients/abscissac/frozenschedule/1",
    }
]

但我希望它返回完整的 URL，而不仅仅是相对路径

[
    {
        "startDate": "2016-10-01",
        "endDate": null,
        "client": "Abscissa.Com Limited",
        "url": "http://localhost:8000/clients/abscissac/frozenschedule/1",
    }
]

我可以在我的序列化程序中以这种方式序列化 URL 吗？

Restful 文档指出 rest_framework reverse 函数完全满足我的需要。但它需要请求对象来构建 UR http://www.django-rest-framework.org/api-guide/reverse/

Answer 1

覆盖 HyperlinkedIdentityField .它有以下方法，

get_url(self, obj, view_name, request, format)

可以是used to map the object instance to its URL representation .即，

class UrlHyperlinkedIdentityField(HyperlinkedIdentityField):
   def get_url(self, obj, view_name, request, format):
     if obj.pk is None:
       return None

    return self.reverse(view_name,
        kwargs={
            'slug': obj.client.slug,
            'pk': obj.id,
        },
        request=request,
        format=format,
    )

然后在 serializers.py 中:

url = UrlHyperlinkedIdentityField(view_name='reports:frozenschedule-detail')