默认验证程序重写

Question

给定模型字段

my_number = models.PositiveIntegerField(validators=[ MaxValueValidator(360) ])

有没有办法覆盖min和max默认验证器？上面我只是简单地添加了一个新的验证器，在服务器上运行得很好。但是，我将一个验证器字典传回给客户机，并且在字段上设置了两个MaxValueValidators，而不仅仅是一个。在

Answer 1

您是否研究过重写窗体的clean（）函数？在

举个例子，我过去做过一些事情：

class ChemLabTimeSelect(forms.Form):

    from_date = forms.DateTimeField(
        widget=DateTimePicker(options={"format": "YYYY-MM-DD HH:mm:ss",
                                       "pickTime": True}))
    to_date = forms.DateTimeField(
        widget=DateTimePicker(options={"format": "YYYY-MM-DD HH:mm:ss",
                                       "pickTime": True}))

    def clean(self):
        cleaned_data = self.cleaned_data
        if cleaned_data.has_key('from_date') and cleaned_data.has_key('to_date'):
            total_days = (cleaned_data['to_date'] - cleaned_data['from_date']).days 
            negative_days = (cleaned_data['from_date'] - cleaned_data['to_date']).total_seconds() 
            if negative_days > 0:
                raise ValidationError({'from_date':["The from date is greater than the to date!",]})
            elif total_days > 7:
                raise ValidationError(["The amount of time selected is %s days which is too large!" % total_days,])          
        return cleaned_data

此外，该模型有一个clean（）重写函数，应该能够达到您想要的结果。但是我们应该意识到表单和模型的干净覆盖之间的区别。在