如何将列表传递给模板

Question

我正在尝试将此合格列表传递给我的模板，以便可以在我的网站中显示它，但是当我运行该网站时，它说在分配之前引用了局部变量“合格”。我不明白，因为这是我唯一一次在我的代码中使用了 eligable 这个词。

代码：

def specificDate(response):
    empName = employeeName.objects.all
    if 'checkEmployee' in response.POST:
            n = response.POST.get("nameEmployee")
            specDate = response.POST.get("date")
            if employeeName.objects.filter(employee=n).exists() and Name.objects.filter(date=specDate).exists():
                emp = employeeName.objects.get(employee=n)
                t = Name.objects.get(name=emp, date=specDate)
                overT = Name.objects.filter(name=emp, overtime=True)
                eligable = []
                for item in overT:
                    eligable.append(item.date)
                    print('Hello')
                checkIn = t.timeIn.strftime("%H:%M:%S")
                checkOut = t.timeOut.strftime("%H:%M:%S")
                datee = datetime.strptime(specDate,'%Y-%m-%d')
                print("Here:: ",t.date)
                print("Month:: ",datee.month)
                messages.info(response, checkIn + ' - ' + checkOut)
                return redirect('/specificDate')
            else:
                messages.info(response, 'Name does not exist')
    else: 
        pass
    return render(response, "main/specificDate.html",  context={"empName":empName, "eligable":eligable})

Answer 1

def specificDate(response):
    empName = employeeName.objects.all
    eligable = []
    if 'checkEmployee' in response.POST:
            n = response.POST.get("nameEmployee")
            specDate = response.POST.get("date")
            if employeeName.objects.filter(employee=n).exists() and Name.objects.filter(date=specDate).exists():
                emp = employeeName.objects.get(employee=n)
                t = Name.objects.get(name=emp, date=specDate)
                overT = Name.objects.filter(name=emp, overtime=True)
                eligable = []
                for item in overT:
                    eligable.append(item.date)
                    print('Hello')
                checkIn = t.timeIn.strftime("%H:%M:%S")
                checkOut = t.timeOut.strftime("%H:%M:%S")
                datee = datetime.strptime(specDate,'%Y-%m-%d')
                print("Here:: ",t.date)
                print("Month:: ",datee.month)
                messages.info(response, checkIn + ' - ' + checkOut)
                return redirect('/specificDate')
            else:
                messages.info(response, 'Name does not exist')
    else: 
        pass
    return render(response, "main/specificDate.html",  context={"empName":empName, "eligable":eligable})

出现错误是正确的，因为如果您的控件不在 if 块内，eligable 列表将不会被初始化，因此在遇到最后一条语句后，它会引发错误。

修复方法是预先初始化列表。