更新環境參數值

Question

我的代碼是

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 

，所以我過濾我的查詢集，也是我需要設置記錄計數作爲上下文參數「計數」 ，但記錄的數量不更新 ，所以我改變了我的代碼

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 

我覺得我重複代碼，這是不這樣做的正確方法。 任何人都可以建議我更新

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

Answer 1

的最佳方式一旦你稱作超get_queryset()，那麼QS被添加到上下文alllead_list;你可以從那裏訪問它。

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

但是，我認爲你根本不需要在視圖中這樣做;您可以通過訪問{{ allead_list.count|default:"000" }}輕鬆地在模板中執行此操作。

編輯由於查詢集進行分頁，您可以直接從分頁程序獲取計數：context['paginator'].count或模板{{ paginator.count }}。