我必须通过多个<int:pk>在 django rest api 的单个端点中？

Question

在上图中，我显示了单个目标 id 的所有包，即 pk=1。 现在，我想展示的是单个目的地的单个包，即我的端点应该是 localhost/api/destination/1/package/1 或类似的东西。 我的视图和序列化程序如下所示：

class Destination(models.Model):
    name = models.CharField(max_length=255, unique=True)
    dest_image = models.ImageField(blank=True)
    thumbnail = ImageSpecField(source='dest_image',
                                      processors=[ResizeToFill(100, 50)],
                                      format='JPEG',
                                      options={'quality': 60})

    def __str__(self):
        return self.name

    @property
    def packages(self):
        return self.package_set.all()


class Package(models.Model):
    destination = models.ForeignKey(Destination, on_delete=models.CASCADE)
    package_name = models.CharField(max_length=255)
    featured = models.BooleanField(default=False)
    price = models.IntegerField()
    duration = models.IntegerField(default=5)
    discount = models.CharField(max_length=255, default="15% OFF")
    discounted_price = models.IntegerField(default=230)
    savings = models.IntegerField(default=230)
    rating = models.IntegerField(choices=((1, 1),
                                          (2, 2),
                                          (3, 3),
                                          (4, 4),
                                          (5, 5))
                                 )
    image = models.ImageField(blank=True)
    thumbnail = ImageSpecField(source='image',
                                      processors=[ResizeToFill(100, 50)],
                                      format='JPEG',
                                      options={'quality': 60})
    date_created = models.DateField()

    def __str__(self):
        return self.package_name

class DestinationPackageSerializer(serializers.ModelSerializer):
    
    class Meta:
        model = Package
        # fields = ['id', 'destination']
        fields = '__all__'
        



class DestinationwithPackageSerializer(serializers.ModelSerializer):
    packages = DestinationPackageSerializer(many= True,read_only=True)
    class Meta:
        model = Destination
        fields = ['id', 'name', 'dest_image', 'packages']
        # fields = '__all__'
        # depth = 1





class DestinationFrontSerializer(serializers.ModelSerializer):
    
    class Meta:
        model = Destination
        # fields = ['id', 'package']
        fields = '__all__'
        # depth = 1

我的观点是：

class DestinationFrontListAPIView(ListAPIView):
    queryset = Destination.objects.all().order_by('?')[:4]
    # queryset = Package.objects.all().order_by('-date_created')[:4]
    serializer_class = DestinationFrontSerializer

class DestinationPackageListAPIView(RetrieveAPIView):
    queryset = Destination.objects.all()
    serializer_class = DestinationwithPackageSerializer

我的网址是：

path('api/destinations', views.DestinationFrontListAPIView.as_view(), name='api-destinations'),
        path('api/destinations/<int:pk>', views.DestinationPackageListAPIView.as_view(), name='api-destinations-packages'),

Answer 1

是什么让您认为包的 URL 中需要destination_id ？ 我相信它是不需要的。 只有package_id就足够了——它是主键，它唯一地标识了包。

如果您确实希望在 URL 中包含destination_id并在获取包时将其考虑在内，您可以这样做：

# urls.py
path(
    'api/destinations/<int:destination_id>/package/<int:pk>',
    views.DestinationPackageItemIView.as_view(),
    name='api-destinations-package',
),


# views.py
class DestinationPackageItemIView(RetrieveAPIView):
    serializer_class = DestinationPackageSerializer

    def get_queryset(self):
        destination_id = self.kwargs['destination_id']
        return Package.objects.filter(destination_id=destination_id)