python - Django 表单永远无效，因此不会保存到数据库

Question

我正在创建一个包含日期、时间(带有选择的字符字段)、客户和餐厅的注册模型。我需要一些帮助来了解为什么即使我填写了模型表单也没有保存我的实例

模型.py

class reservation(models.Model):
    TIMESLOTS = [
        ('11:00-1:00', '11:00-1:00'),
        ('01:00-3:00', '01:00-03:00'),
        ('03:00-05:00', '03:00-05:00'),
        ('05:00-07:00', '05:00-07:00'),
        ('07:00-09:00', '07:00-09:00')
    ]

    date=models.DateField(null=True)
    time=models.CharField(null=True,max_length=200,choices=TIMESLOTS)
    customer=models.OneToOneField(User,null=True,on_delete=models.CASCADE)
    restaurant=models.OneToOneField(Restaurantdetails,on_delete=models.CASCADE,null=True)

    def __str__(self):
        return self.restaurant.name

表单.py

class Reservationform(ModelForm):

    class Meta:

        model=reservation
        fields=['date','time','restaurant']

views.py

def reservationcreator(request):
    form=Reservationform()

    if form.is_valid():
        form = Reservationform(request.POST)

        res=form.save()
        res.customer=request.user
        res.save()
        messages.success(request, 'reservation created')
        return redirect('menu')
    else:
        print('BS')
    context = {'form': form}

    return render(request,'userrestaurant/reservation.html',context)

Answer 1

您的表格将永远有效，因为您提供的是空表格。您需要将 request.POST 数据添加到该表单 before 您验证它:

def reservationcreator(request):
    form=Reservationform(request.POST or None)

    if form.is_valid():
        res.customer=request.user
        res=form.save()
        messages.success(request, 'reservation created')
        return redirect('menu')
    else:
        print('BS')
    context = {'form': form}

    return render(request,'userrestaurant/reservation.html',context)