类似对象的表单确认ValidationError

Question

在保存对象之前，我想添加一条验证警告消息，以询问最终用户 he/she 是否要继续，给定从数据库返回的类似数据。

例如，当最终用户正在添加一个 Hospital，并且一个或多个 Hospital 对象已经存在于那个 zipcode 中，那么 ValidationError 应该是提供类似 Following hospitals in zipcode XX were already found: YYY, ZZZZ. Hit submit again to save if you're sure you want to add another one.

的说法

我试图通过添加字段 Verified（设置为 HiddenInput）使用以下表格来实现此目的。看来我无法修改该字段。

class CreateHospitalForm(forms.ModelForm):

    verified = forms.BooleanField(widget=forms.HiddenInput, required=False)

    def clean(self):
        cleaned_data = self.cleaned_data

        zipcode = cleaned_data.get('zipcode')
        verified = cleaned_data.get('verified')

        existing_hospitals = Hospital.objects.filter(zipcode=zipcode)

        if existing_hospitals and not verified:
            cleaned_data['verified'] = True  # <<< here I'd like to set verified to True so I don't get the below warning a 2nd time when saving the form
            raise ValidationError(u"Following hospitals already exist in this zipcode: " + ', '.join([str(x) for x in existing_hospitals] + ". Are you sure you want to add another one? Then hit submit again.")

        return cleaned_data

    class Meta:
        model = Hospital
        fields = ('name', 'street_and_number', 'zipcode', 'town', 'country', 'email', 'web', 'comments', 'verified')

知道如何解决这个问题吗？使用 Django 1.7.

编辑：我的观点是非常标准的，按照要求在下面：

class CreateHospitalView(generic.CreateView):

    model = Hospital
    template_name = 'hosp_add.html'
    form_class = CreateHospitalForm

    def get_success_url(self):
        return reverse('hosp_detail', args=(self.object.id,))

Answer 1

这是你的答案。将您的清理方法更新为此（请参阅代码中的注释）。

def clean(self):
    cleaned_data = self.cleaned_data

    zipcode = cleaned_data.get('zipcode')
    verified = cleaned_data.get('verified')

    existing_hospitals = Hospital.objects.filter(zipcode=zipcode)

    if existing_hospitals and not verified:
        self.data = self.data.copy()  # self.data is immutable, so we make a copy to get around this
        self.data['verified'] = True  # instead of self.cleaned_data['verified'] = True
        raise ValidationError(u"Following hospitals already exist in this zipcode: " + ', '.join([str(x) for x in existing_hospitals] + ". Are you sure you want to add another one? Then hit submit again.")

    return cleaned_data

类似对象的表单确认ValidationError

Form confirmation ValidationError for similar objects

django

django-forms