Question

我在模型中使用两个日期字段，如下所示。

   private void initUser(){

    /**
     * TODO: Da spostare nella classe Model, o comunque nel package model!!!
     */

    FirebaseManager fireManager = FirebaseManager.getInstance();


    FirebaseManager.getInstance().getUser(new FirebaseManager.DataSnapshotCallback() {
        @Override
        public void onResult(DataSnapshot result) {
            user = result.getValue(User.class);
        }
    });
}

我在我的GCBV Create中使用模型表格。我要覆盖表单的class Booking(models.Model): checkin_date = models.DateField() checkout_date = models.DateField() ...方法以在字段之间进行条件验证。

clean()

当我为任一日期输入无效值（例如2018-09- 31 ）时，它都会失败并打印堆栈跟踪。

堆栈跟踪：

class BookingForm(forms.ModelForm):
    class Meta:
        model = Booking

    def clean(self):
        cleaned_data = super(BookingForm, self).clean()
        checkin_date = self.cleaned_data['checkin_date'] # fail here
        checkout_date = self.cleaned_data['checkout_date'] # fail here

        self.validate_dates(checkin_date, checkout_date)


# GCBV Create
class NewBooking(CreateView):
    form_class = BookingForm
    model = Booking

1）这是所有表单字段验证的行为，并且仅在File "/home/indikau/workspace/projects/src/booking/forms.py" in clean 67. checkout_date = self.cleaned_data['checkout_date'] Exception Type: KeyError at /booking/add/ Exception Value: 'checkout_date'方法被覆盖时才会发生吗？

2）如何在不完全失败的情况下克服问题？

Answer 1

我认为您应该从 cleaned_data 获取数据，而不是从 cleaned_data

class BookingForm(forms.ModelForm):
    class Meta:
        model = Booking

    def clean(self):
        cleaned_data = super(BookingForm, self).clean()
        checkin_date = cleaned_data.get('checkin_date')
        checkout_date = cleaned_data.get('checkout_date')
        if checkout_date and checkin_date:
            self.validate_dates(checkin_date, checkout_date)

参考：Example of clean() method

输入无效值作为日期时的Django falis

1 个答案: