自定义form表单验证

方式一：RegexValidator对象

from django.core.validators import RegexValidator

phone = fields.CharField(

    validators=[RegexValidator(r‘^[0-9]+$‘, ‘请输入数字‘), RegexValidator(r‘^159[0-9]+$‘, ‘数字必须以159开头‘)])   # 自定义验证规则进行验证

方式二：函数

from django.core.exceptions import ValidationError

def mobile_validate(value):    mobile_re = re.compile(r‘^(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$‘)    if not mobile_re.match(value):        raise ValidationError(‘手机号码格式错误‘)

phone = fields.CharField(        validators=[mobile_validate,])   # 自定义验证规则进行验证

方式三：钩子函数1,分析

通过上面分析1，通过_clean_fields实现

def _clean_fields(self):    for name, field in self.fields.items():        # value_from_datadict() gets the data from the data dictionaries.        # Each widget type knows how to retrieve its own data, because some        # widgets split data over several HTML fields.        if field.disabled:            value = self.get_initial_for_field(field, name)        else:            value = field.widget.value_from_datadict(self.data, self.files, self.add_prefix(name))        try:            if isinstance(field, FileField):                initial = self.get_initial_for_field(field, name)                value = field.clean(value, initial)            else:                value = field.clean(value)            self.cleaned_data[name] = value            if hasattr(self, ‘clean_%s‘ % name):                value = getattr(self, ‘clean_%s‘ % name)()                self.cleaned_data[name] = value        except ValidationError as e:            self.add_error(name, e)

通过上面可以实现

def clean_phone(self):    # 去取用户提交的值：可能是错误的，可能是正确    value = self.cleaned_data[‘phone‘]    mobile_re = re.compile(r‘^(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$‘)    if not mobile_re.match(value):        raise ValidationError(‘手机号码格式错误‘)

if models.UserInfo.objects.filter(phone=value).count():        raise ValidationError(‘手机号码已经存在‘)

return value

注意钩子字段只能取自己的。不然可能取不到。源码是通过__dict__取得

 

执行流程  1，正则表达式　　　　  2,clean钩子函数