Django Generic View - 来自 DetailView 实例的 ListView答案

【问题标题】：Django Generic View - ListView from an instance of DetailViewDjango Generic View - 来自 DetailView 实例的 ListView
【发布时间】：2019-02-12 19:05:57
【问题描述】：

我正在使用通用视图 DetailView 和 ListView

我有三个模型，例如 User、Business 和 Invoice。一个用户可以有多个企业可以有多个发票。

#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')

我正在寻找的是从业务的 DetailView 继承发票的 ListView，即从业务的实例，即必须列出特定业务的所有发票。

如何实现这样的：

 #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"

但这不起作用，因为我要覆盖每个班级的model...

对于 url http://example.com/business/1/invoices/1/，在模板内我必须有一个带有发票实例的变量。

【问题讨论】：

标签： django django-models django-templates django-views django-generic-views

【解决方案1】：

不需要继承；您只需要定义get_queryset 即可按业务pk 过滤发票。

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

    def get_queryset(self):
        return Invoice.objects.filter(business_id=self.kwargs['pk'])

【讨论】：

但是，我还想在InvoiceListView 上使用BusinessOwnerRequiredMixin 。只有所有者可以查看该特定业务的InvoiceListView 。如何实现？
您可以在这个视图中实现一个简单的get_object 方法，从kwargs 中获取业务，然后mixin 就可以工作了。
是的。没有考虑。谢谢。
嘿，我还有一个http://example.com/business/1/invoices/1/=> InvoiceDetailView。如果我在这里实现get_object 并使用BusinessOwnerRequiredMixin，这将覆盖Invoice 对象。有什么帮助吗？