在我的django应用程序中，我有一个“Incidence”模型，它有几个FileField和ImageField。我想用Django Rest Framework创建一个端点来检索关于"Incidence"的信息，但到目前为止我所做的只是检索文件的url。我需要返回的格式，可以由客户端应用程序下载的文件，如二进制数据或其他建议。我该怎么做？这就是我目前所做的
模型定义：

class Incidence(BasicAuditModel):
    
        id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False, unique=True)
        geom = models.PointField(verbose_name=_("Localización"), srid=4326, blank=True, null=True)
        name = models.CharField(_("Nombre"), max_length=255)
        incidence_type = models.CharField(_("Tipo incidente"), max_length=50, choices=INCIDENCE_TYPE_CHOICES, default="tipo1")
        description = models.TextField(_("Descripción"), blank=True, null=True)
        status = models.CharField(_("Status"), max_length=50, choices=STATUS_CHOICES, default="creado")
        image1 = models.ImageField(verbose_name=_("Foto 1"), upload_to="incidencia_fotos",
                                                    null=False, blank=False)
        image2 = models.ImageField(verbose_name=_("Foto 2"), upload_to="incidencia_fotos",
                                                    null=False, blank=False)
        image3 = models.ImageField(verbose_name=_("Foto 3"), upload_to="incidencia_fotos",
                                                    null=False, blank=False)
        audio = models.FileField(verbose_name=_("Audio"), upload_to="incidencia_audioa",
                                                    null=False, blank=False)
        
        video = models.FileField(verbose_name=_("Video"), upload_to="incidencia_video",
                                                    null=False, blank=False)
    
        def __str__(self):
            return self.name
    
        class Meta:
            db_table = 'sini_incidence'
            managed = True
            verbose_name =  'Incidencia'
            verbose_name_plural =  'Incidencias'

class BasicAuditModel(models.Model):
    created_by = models.ForeignKey(settings.AUTH_USER_MODEL, 
                related_name="+",
                verbose_name=_("Creado por"), 
                null=True,
                blank=False,
                on_delete=models.SET_NULL)
    modified_by = models.ForeignKey(settings.AUTH_USER_MODEL, 
                    related_name="+",
                    verbose_name=_("Modificado por"), 
                    null=True,
                    blank=False,
                    on_delete=models.SET_NULL)
    created = models.DateTimeField(auto_now_add=True, verbose_name=_("Fecha creado"))
    modified = models.DateTimeField(auto_now=True, verbose_name=_("Fecha modificado"))

序列化程序类：

from rest_framework_gis.serializers import GeoFeatureModelSerializer
class IncidenceSerializer(GeoFeatureModelSerializer):

    class Meta:
        model = Incidence
        geo_field = "geom"
        fields = ('id','geom','name','incidence_type',
        'description','status', 'image1', 'image2', 'image3', 'audio', 'video')
        extra_kwargs = {'geom': {'required': True}} 
        read_only_fields = ['id','created_by', 'modified_by', 'created','modified']

这就是观点：

class IncidenceAPIRetrieve(generics.RetrieveAPIView):
    authentication_classes = [JWTAuthentication]
    permission_classes = (IsAuthenticated,)
    queryset = Incidence.objects.all()
    serializer_class = IncidenceSerializer

这就是我得到的JSON。正如您所看到的，端点返回文件的url。我需要能够下载文件。