一次父类继承导致的bug，flask:TheCSRFtokenismissing.

一、问题描述

表单定义如下&＃xff1a;

class UserInfoEditForm(FlaskForm):"""用户信息编辑表单"""new_username &＃61; StringField("用户名", validators&＃61;[DataRequired()])new_email &＃61; StringField("邮箱", validators&＃61;[DataRequired(), Email()])new_password &＃61; PasswordField("密码", validators&＃61;[DataRequired()])new_password2 &＃61; PasswordField("确认密码", validators&＃61;[DataRequired(), EqualTo("new_password", message&＃61;"密码与确认密码不一致&＃xff01;")])submit &＃61; SubmitField("提交")def __init__(self, origin_username, origin_email, *args, **kwargs):super(UserInfoEditForm, self).__init__(origin_username, *args, **kwargs)self.origin_username &＃61; origin_usernameself.origin_email &＃61; origin_emaildef validate_username(self, new_username):if self.origin_username !&＃61; new_username.data:user &＃61; User.query.filter_by(username&＃61;self.new_username.data).first()if user is not None:raise ValidationError("该用户名已被使用&＃xff01;")def validate_email(self, new_email):if self.origin_email !&＃61; new_email.data:user &＃61; User.query.filter_by(email&＃61;self.new_email.data).first()if user is not None:raise ValidationError("该邮箱账号已被使用&＃xff01;")


提交表单时&＃xff0c;发现提交的参数均为空&＃xff1a;

二、问题定位

1、经过排查发现在继承父类FlaskForm时&＃xff0c;多传了一个参数&＃xff1a;
super(UserInfoEditForm, self).init(origin_username, *args, **kwargs)

2、查看父类FlaskForm初始化源码&＃xff1a;

3、果断发现super(UserInfoEditForm, self).init(origin_username, *args, **kwargs)这种继承父类FlaskForm的方式不对&＃xff0c;改为以下方式就OK了&＃xff1a;

super(UserInfoEditForm, self).__init__(*args, **kwargs)