Django属性错误-表单对象没有属性'is_valid'

Question

我在尝试将表单数据插入表单时收到错误，对象没有属性'is_valid'。下面是我的代码的结构：

Views.py：

def add_user(request):
    form = Car(request.POST)
    if request.method == 'POST' and form.is_valid():
        last_store = form.cleaned_data.get['value']
        make = request.POST.get('make', '')
        model = request.POST.get('model', '')
        ..

        car_obj = Car(last_store = last_store, make = make, model = model, series = series, series_year = series_year, price_new = price_new, engine_size = engine_size, fuel_system = fuel_system, tank_capacity = tank_capacity, power = power, seating_capacity = seating_capacity, standard_transmission = standard_transmission,  body_type = body_type, drive = drive, wheelbase = wheelbase, available = available)
        car_obj.save()
        return HttpResponseRedirect('/inventory/add/')
    else:
        form = Car()

    return render(request, 'cars/inventory-add.html', {})

班级：

class Car(models.Model):
    make = models.CharField(max_length=200, null=False)
    model = models.CharField(max_length=200, null=False)
    series = models.CharField(max_length=200, null=False)
    series_year = models.IntegerField(null=False)
    price_new = models.IntegerField(null=False)
    ..
    last_store = models.ForeignKey(Store, on_delete=models.DO_NOTHING, related_name="last_store")
    available = models.BooleanField(null=False, default=True)

    def __str__(self):
        return(self.make + " " + self.model)

CarForm（forms.py）

class CarForm(forms.ModelForm):
    class Meta:
        model = Car
        fields = ['last_store', 'make', 'model', 'series', 'series_year', 'price_new', 'engine_size', 'fuel_system', 'tank_capacity', 'power', 'seating_capacity', 'standard_transmission', 'body_type', 'drive', 'wheelbase', 'available']

与last_store一样，错误也位于form.is_valid()内，显然我无法使用form.cleaned_data，但是form.is_valid()似乎根本不存在？如上课所示，last_store是外键类型，因此当用户在表单中输入输入时，我正在努力为其设置默认值。 last_store变量正在尝试从包含SELECT选项的输入表单数据中获取值。

Answer 1

您的模型和表单之间都存在冲突，它们都名为Car。通常，您可以通过重命名格式CarForm来解决此问题。

请注意，您通常不需要使用car_obj = Car(...)创建对象。如果您使用，则可以将代码简化为car_obj = form.save()。您还应该在CarForm(request.POST)检查中移动if request.method == 'POST'，并将form包含在模板上下文中。放在一起，你会得到类似的东西：

def add_user(request):
    if request.method == 'POST':
        form = CarForm(request.POST)
        if form.is_valid():
            car_obj = form.save()
            return HttpResponseRedirect('/inventory/add/')
    else:
        form = CarForm()
    return render(request, 'cars/inventory-add.html', {'form': form})