flask_wtf表单验证示例源码
from flask_wtf import FlaskForm
from wtforms import PasswordField, StringField
from wtforms.validators import Email, Length, EqualTo, DataRequired, ValidationError
from conn import conn
class RegisterForm(FlaskForm):
"""注册表单验证"""
#password confirm_pwd username 和 html模板中<input name属性值一致。
password = PasswordField(label='密码',
validators=[Length(3, 18, message='密码格式错误'),
DataRequired('密码不能为空')])
confirm_pwd = PasswordField('确认密码', validators=[EqualTo("password", message='两次密码不一致')])
username = StringField(label='邮箱账号', validators=[Email(message='邮箱格式错误!')])
#自定义验证器
def validate_username(self, field):
"""邮箱是否已被注册过"""
username = field.data
sql = f"select * From user where username='{username}'"
data = conn.data_is_in(sql)
if data:
raise ValidationError(message='该邮箱已经被注册!')<form name="f1" action="{{url_for('user.register')}}" method="post" >
<input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
<div class="card-body" style="line-height:30px;">
<div class="mb-3">
<label for="">邮箱账号</label>
<input type="text" name="username" class="form-control"/>
</div>
<div class="mb-3">
<label for="">密码</label>
<input type="password" name="password" class="form-control"/>
</div>
<div class="mb-3">
<label for="">确认密码</label>
<input type="password" name="confirm_pwd" class="form-control"/>
</div>
<div class="mb-3">
<button type="submit" name="register_btn" class="btn btn-primary">注册</button>
</div>
</div>
</form>
关于表单验证带来的问题
The CSRF token is missing
解决方案如下：
https://moban.shenhuangji.com/wenzhang/509.html