从 get_queryset () django 更新上下文参数值

Question

我的密码是

class Leads(LoginRequiredMixin, ListView):

def get_queryset(self):
q = self.request.GET.get('q', "all")
        if q == "customer":
            qs = alllead.objects.filter(isCustomer="yes")
        elif q == "lead":
            qs = alllead.objects.filter(isCustomer="no")
        else:
            qs = self.queryset
return qs

def get_context_data(self, **kwargs):
    context = super(Leads, self).get_context_data(**kwargs)
    count = self.queryset.count()
    context['count'] = count or "000"
return context

所以我正在过滤我的查询集，我还需要将记录数设置为上下文参数"count" 但记录数没有更新所以我将我的代码更改为

def get_queryset(self):
q = self.request.GET.get('q', "all")
        if q == "customer":
            qs = alllead.objects.filter(isCustomer="yes")
        elif q == "lead":
            qs = alllead.objects.filter(isCustomer="no")
        else:
            qs = self.queryset
return qs

def get_context_data(self, **kwargs):
    context = super(Leads, self).get_context_data(**kwargs)
     q = self.request.GET.get('q', "none")
     if q == "customer":
         count = alllead.objects.filter(isCustomer="yes").count()
     elif q == "lead":
         count = alllead.objects.filter(isCustomer="no").count()
     else:
         count = self.queryset.count()
     context['count'] = count or "000"
return context

我认为我在复制代码，这不是正确的做法。谁能建议我更新的最佳方式

context['count'] = qs.count()
#inside get_queryset()

Answer 1

一旦调用超类 get_queryset()，那么 qs 将作为 alllead_list 添加到上下文中；你可以从那里访问它。

def get_context_data(self, **kwargs):
    context = super(Leads, self).get_context_data(**kwargs)
    count = context['alllead_list'].count()

但是，我认为您根本不需要在视图中执行此操作；您可以通过访问 {{ allead_list.count|default:"000" }}.

在模板中轻松地执行此操作

编辑由于查询集是分页的，您可以直接从分页器中获取计数：context['paginator'].count 或在模板中 {{ paginator.count }}.

从 get_queryset () django 更新上下文参数值

update context parameter value from get_queryset () django

django

django-queryset

django-class-based-views