python 提交表单

class UserForm(forms.Form):
    username = fields.CharField(
        required=True,error_messages={'required':'用户名不能为空'},
        widget=widgets.TextInput(attrs={'class':'form-control'})
    )   #正则表达式
    password = fields.CharField(required=True,error_messages={'required':'用户名不能为空'},
                                widget=widgets.TextInput(attrs={'class':'form-control'})
                                )#正则表达式
    email = fields.EmailField(required=True,error_messages={'required':'用户名不能为空','invalid':'邮箱格式错误'},
                              widget=widgets.TextInput(attrs={'class': 'form-control'})
                              )     #正则表达式
    # ut_id = fields.IntegerField(
    #     required=True,
    #     widget=widgets.Select(attrs={'class':'form-control'},choices=[(1,'普通用户'),(2,'超级用户')])
    # )
    ut_id = fields.IntegerField(
        required=True,
        widget=widgets.Select(
            attrs={'class':'form-control'},
            choices=models.UserType.objects.values_list('id','name')
        )
    )

    ###解决数据库实时更新的问题
    def __init__(self,*args,**kwargs):
        super(UserForm,self).__init__(*args,**kwargs)
        self.fields['ut_id'].widget.choices = models.UserType.objects.values_list('id','name')