使用WTForms表单验证，可以在数据建模时就设置验证信息和错误提示
创建模型时，设置验证内容，如必填、格式、长度
from flask_wtf import Formfrom wtforms import StringField, PasswordField, BooleanFieldfrom wtforms import validators
class UserRegForm(Form): username = StringField(‘用户名‘, [validators.DataRequired(‘用户名必填！‘), validators.Length(min=4, max=8, message=‘长度为4-8之间‘)])
email = StringField(‘邮箱‘, [validators.Email(‘邮箱格式不正确‘)])
password = PasswordField(‘密码‘, [validators.DataRequired(‘密码必填！‘), validators.Length(min=6, max=16, message=‘长度为6-16之间‘)])
confirm = PasswordField(‘确认密码‘, [validators.EqualTo(‘password‘, message=‘密码输入不一致‘)]) accept = BooleanField(‘同意协议‘, [validators.DataRequired(‘同意协议才可以注册‘)])
前台页面，渲染数据信息和错误信息
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>用户注册</title></head><body><form action="#" method="POST">{#form要求加上form.csrf_token方脚本跨域攻击#}{{ form.csrf_token }} <table border="1"> <tr> <td>{{ form.username.label }}</td> <td>{{ form.username }}</td>{# 如果有错误信息，就遍历出来#} <td> {% if form.username.errors %} {% for error in form.username.errors %} <li>{{ error }}</li> {% endfor %} {% endif %} </td> </tr> <tr> <td>{{ form.email.label }}</td> <td>{{ form.email }}</td> <td> {% if form.email.errors %} {% for error in form.email.errors %} <li>{{ error }}</li> {% endfor %} {% endif %} </td> </tr> <tr> <td>{{ form.password.label }}</td> <td>{{ form.password }}</td> <td> {% if form.password.errors %} {% for error in form.password.errors %} <li>{{ error }}</li> {% endfor %} {% endif %} </td> </tr> <tr> <td>{{ form.confirm.label }}</td> <td>{{ form.confirm }}</td> <td> {% if form.confirm.errors %} {% for error in form.confirm.errors %} <li>{{ error }}</li> {% endfor %} {% endif %} </td> </tr> <tr> <td></td> <td>{{ form.accept }}{{ form.accept.label }}</td> </tr> <tr> <td></td> <td><input type="submit" value="提交"></td> </tr> </table></form></body></html>
路由
from flask import Flask, render_template, request app = Flask(__name__, static_url_path=‘‘) # 初始化app, @app.route(‘/reg/‘, methods=[‘GET‘, ‘POST‘])def user_reg(): from validations.froms import UserRegForm form = UserRegForm(request.form) if request.method == ‘POST‘ and form.validate(): return str(form.data) return render_template(‘user-reg.html‘, form=form)
访问并触发验证
输入符合要求的数据访问
原文地址：https://www.cnblogs.com/zhongyehai/p/11538118.html
时间： 2024-10-24 21:43:45