通用详细信息视图必须使用URLconf中的对象pk或slug调用

如何解决通用详细信息视图必须使用URLconf中的对象pk或slug调用

当我尝试访问/domains/{domain}/{host}时，Django给我以下错误：

Generic detail view HostDetailPageView must be called with either an object pk or a slug in the URLconf.

看来DetailView期望的东西与我提供的东西有所不同。

urls.py

urlpatterns = [
    path('domains/',DomainsPageView.as_view()),path('domains/<str:domain>',DomainHostsPageView.as_view()),path('domains/<str:domain>/<str:host>',HostDetailPageView.as_view()),path('',TemplateView.as_view(template_name="hosts/index.html"))
]

views.py

class HostDetailPageView(DetailView):
    template_name = 'hosts/hostdetail.html'
    model = Host

    # Populates list of enabled domains in the context
    def get_queryset(self):
        qs = super().get_queryset()
        filtered = qs.filter(name=self.kwargs['host'])

        if not filtered.exists():
            raise Http404("Host does not exist")

        # filter by a variable captured from url,for example
        return filtered.first()

    def get_context_data(self,**kwargs):
        return super().get_context_data(**kwargs)

models.py

class Host(models.Model):
    created = models.DateTimeField(auto_now_add=True)
    last_updated = models.DateTimeField(auto_now=True)
    name = models.CharField(unique=True,max_length=settings.MAX_CHAR_COUNT)
    ip_addresses = models.ManyToManyField(IPAddress)
    services = models.ManyToManyField(Service)
    domain = models.ForeignKey(Domain,on_delete=models.CASCADE)
    os = models.ForeignKey(OperatingSystem,on_delete=models.CASCADE,blank=True,null=True)

    ciphers = models.ManyToManyField(Cipher,blank=True)
    certificate = models.ForeignKey(Certificate,null=True)

    class Meta:
        ordering = ['name']

解决方法

设置 pk_url_kwarg 属性并覆盖视图的 get_queryset(...) 方法

class HostDetailPageView(DetailView):
    template_name = 'hosts/hostdetail.html'
    model = Host
    pk_url_kwarg = 'name'

    def get_queryset(self):
        return super().get_queryset().filter(host__name=self.kwargs['host'])