django预留的钩子方法：

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)

自定义钩子方法：

针对一个字段做验证的时候使用clean_%s自定义验证 def clean_username(self):     username = self.cleaned_data.get("username")     username_exist = models.UserInfo.objects.filter(username=username)     if username_exist:         self.add_error("username",ValidationError("用户名已存在")) def clean_phone(self):     phone = self.cleaned_data.get('phone')     phone_exist = models.UserInfo.objects.filter(phone=phone)     if phone_exist:         self.add_error('phone', ValidationError("手机号码已存在"))

针对多个字段做验证的时候使用clean自定义验证

def clean(self):     pwd1 = self.cleaned_data.get('password')     pwd2 = self.cleaned_data.get('re_password')     if pwd1 == pwd2:         pass     else:         self.add_error('re_password', ValidationError('密码输入不一致'))

 

jquery绑定数据：

jquery使用on(input,func)绑定事件input框有输出就可以检测。