Django Generic View-来自DetailView实例的ListView

我使用的是通用视图 DetailView 和 ListView

我有三个这样的模型 User , Business 和 Invoice

#mixins.py
class BusinessOwnerRequiredMixin(object):

    def has_permissions(self):
        obj = self.get_object()
        if isinstance(obj, Business):
        # Assumes that your Article model has a foreign key called `auteur`.
            return obj.owner == self.request.user

    def dispatch(self, request, *args, **kwargs):
        if not self.has_permissions():
            raise PermissionDenied
        return super(BusinessOwnerRequiredMixin, self).dispatch(request, *args, **kwargs)

#views.py
class BusinessDashboard(BusinessOwnerRequiredMixin, DetailView):
    model = Business
    template_name = "business/business-main.html"

class InvoiceListView(BusinessDashboard):
    template_name = "business/purchase/purchase_invoice-main.html"

class InvoiceDetailView(InvoiceListView):
    template_name = "business/purchase/purchase_invoice.html"

#urls.py
path(r'business/<pk>/purchase_invoices/<pid>/',vw.PurchaseInvoiceDetailView.as_view(), name='purchase_invoice'),
path(r'business/<pk>/purchase_invoices/',vw.PurchaseInvoiceListView.as_view(), name='purchase_invoices')

如何实现这一点,如:

 #views.py
    #views.py
class BusinessDashboard(BusinessOwnerRequiredMixin, DetailView):
    model = Business
    template_name = "business/business-main.html"

class InvoiceListView(BusinessDashboard, ListView):
    model = Invoice
    template_name = "business/purchase/purchase_invoice-main.html"

class InvoiceDetailView(InvoiceListView, DetailView):
    model = Invoice
    template_name = "business/purchase/purchase_invoice.html"

但那不管用,因为我要推翻 model 在每节课上。。。

对于url http://example.com/business/1/invoices/1/ ,在模板中,我必须有一个带有invoice实例的变量。