相关疑难解决方法(0)

CreateView如果模型中没有项目,我想显示存在的表单.否则我需要显示表格中存在的UpdateView.这样它就会加载已保存的值.稍后我应该通过调用update_or_create方法将数据保存到db .

这可能吗？

因此，下面是我在观看 Django Con EU 谈话视频后通过基于第一类的视图创建的。

它有效并且理解它的作用。我不明白基于类的视图和我刚刚构建的通用类基视图之间的区别？

class GroupListView(ListView):
    """
    List all Groups.
    """
    context_object_name = 'groups'
    template_name = 'contacts/home.html'

    def get_context_data(self, **kwargs):
        """
        Get the context for this view.
        """
        # Call the base implementation first to get a context.
        context = super(GroupListView, self).get_context_data(**kwargs)
        # Add more contexts.
        context['tasks'] = Upload.objects.filter(uploaded_by=self.request.user).order_by('-date_uploaded')[:5]
        context['unsorted'] = Contact.objects.unsorted_contacts(user=self.request.user).count()

        return context

    def get_queryset(self):
        """
        Get the list of items for this view. This must be an iterable, and may
        be a queryset (in which …