python - 对用户字段验证器（Django）没有反应

Question

我有这个代码：

class RegisterForm(forms.Form):
    acc_types_lst = AccountType.objects.values_list('Name', flat=True).order_by('ID')

    Name = forms.CharField(max_length=255, required=True, label='Имя')
    Surname = forms.CharField(max_length=255, required=True, label='Фамилия')
    DateOfBirth = forms.DateField(required=True, label='Дата рождения',
                              input_formats=['%Y-%m-%d', '%m.%d.%Y', '%m.%d.%y'])
    Address = forms.CharField(max_length=255, required=True, label='Адрес',
                          widget=forms.Textarea(attrs={'cols': 55, 'rows': 5}))
    Postcode = forms.CharField(required=True, label='Почтовый индекс')
    Phone = forms.CharField(max_length=50, required=True, label='Телефон')
    PassportID = forms.CharField(max_length=50, required=True, label='Номер паспорта')
    AccountType = forms.ChoiceField(choices=[x for x in enumerate(acc_types_lst)],
                                required=True, label='Тип счета')
    DepositeSize = forms.IntegerField(required=True, label='Начальный вклад')

    def clean_name(self):
        name = re.match('^[a-zA-Z]*$', self.cleaned_data['Name']).group()
        if name is None:
            raise forms.ValidationError("Имя не корректно или строка пуста!")
        else:
            return name
    ...

    def clean_deposit(self):
        deposite_size = int(self.cleaned_data['DepositeSize'])
        acc_type = AccountType.objects.values('Name', 'MinDep').get(ID=1)['MinDep']
        if deposite_size < int(acc_type):
            raise forms.ValidationError("Тип счета "+acc_type['Name']+" требует минимум "+acc_type['MinDep'] + "!")
        else:
            return deposite_size

但我无法理解一件事：为什么用户验证器（clean_deposit）不引发异常？是的，我会在“manage.py shell”中检查这个，但在实际情况下（调试模式）系统会通过这个。