前面做的wtform验证是服务器端的验证，需要把数据传输到服务器，服务器验证后再吧结果传输到前端，网络慢的时候，用户体验不好，所以需要前端验证，且后端验证不能少
传统的js或者jquery如果要验证信息，需要把一个个元素下的信息拿下来，再验证，而validation可以根据元素定位，可以直接就验证了
validation官网：https://jqueryvalidation.org/
cnd引用地址：https://www.bootcdn.cn/jquery-validate/
引用标签：
<script src="https://cdn.bootcss.com/jquery-validate/1.15.1/jquery.validate.js"></script>
<script src="https://cdn.bootcss.com/jquery-validate/1.15.0/additional-methods.min.js"></script>
页面
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>用户注册</title> {#引用各插件标签#} <script src="https://cdn.bootcss.com/jquery/2.2.4/jquery.min.js"></script> <link href="https://cdn.bootcss.com/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.bootcss.com/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script> <script src="https://cdn.bootcss.com/jquery-validate/1.15.1/jquery.validate.js"></script> <script src="https://cdn.bootcss.com/jquery-validate/1.15.0/additional-methods.min.js"></script></head><body><div class="container"> <div class="row"> <h1>注册</h1> </div> <div class="row"> <div class="col-md-6 col-md-offset-3"> <form action="#" method="post" id="regForm" autocomplete="off" class="form-horizontal"> {# <form action="#" id="regForm" autocomplete="off" class="form-horizontal">#} <div class="form-group"> <label for="username" class="control-label col-md-2">用户名</label> <div class="col-md-10"> <input type="text" class="form-control" id="username" name="username"> </div> </div> <div class="form-group"> <label for="pwd" class="control-label col-md-2">密码</label> <div class="col-md-10"> <input type="password" class="form-control" id="pwd" name="pwd"> </div> </div> <div class="form-group"> <label for="confirm" class="control-label col-md-2">确认密码</label> <div class="col-md-10"> <input type="password" class="form-control" id="confirm" name="confirm"> </div> </div> <div class="form-group"> <label for="email" class="control-label col-md-2">邮箱</label> <div class="col-md-10"> <input type="email" class="form-control" id="email" name="email"> </div> </div> <div class="form-group"> <label for="website" class="control-label col-md-2">网址</label> <div class="col-md-10"> <input type="text" class="form-control" id="website" name="website"> </div> </div> <div class="form-group"> <label for="agree" class="control-label col-md-2">同意协议</label> <div class="col-md-10"> <input type="checkbox" id="agree" name="agree"><label for="agree">同意协议</label> </div> </div> <div class="form-group"> <div class="col-md-10 col-md-offset-2"> <input type="submit" class="btn btn-primary" id="idSubmit" value="注册"> {# <input type="button" class="btn btn-primary" id="idSubmit" value="注册">#} <input type="reset" class="btn btn-default" value="重置"> </div> </div> </form> </div> </div></div></body></html><script> $(document).ready(function () { //给id为regForm，即form表单，绑定validate的规则 $(‘#regForm‘).validate({ //规则，根据前面html里面定义的各个id rules: { username: {required: true, minlength: 2, remote: ‘/checkuser/‘}, //必填，长度为2，访问/checkuser/验证数据是否已存在 pwd: {required: true, minlength: 6}, confirm: {required: true, equalTo: ‘#pwd‘}, email: {email: true}, // 可以不填，但是如果填了就会验证格式是否为邮箱 website: {url: true}, // 可以不填，但是如果填了就会验证格式否为url agree: ‘required‘ // 同{required: true} }, //提示信息，根据前面html里面定义的各个id messages: { username: {required: ‘用户名必填‘, minlength: ‘长度不能小于2位‘, remote: ‘用户名已存在‘}, pwd: {required: ‘密码必填‘, minlength: ‘长度不能小于6位‘}, confirm: {required: ‘重复密码必填‘, equalTo: ‘两次密码不一致‘}, email: {email: ‘邮箱格式不正确‘}, website: {url: ‘网址格式不正确‘}, agree: {‘required‘: ‘必须同意协议才能注册‘} }, //提交处理，先获取表单的数据，再触发ajax submitHandler: function (form) { $.ajax({ type: ‘POST‘, url: ‘/reg/‘, data: $(form).serialize(), //自动获取数据并序列化，不用在前面获取数据再放入字典 success: function (response) { console.log(response); } }); } });
});</script>
后台代码
from flask import Flask, render_template, request, jsonifyfrom flask_sqlalchemy import SQLAlchemy app = Flask(__name__, static_url_path=‘‘)db = SQLAlchemy(app) app.config[‘SQLALCHEMY_DATABASE_URI‘] = ‘sqlite:///./db/test.db‘ # 声明数据库类型和地址app.config[‘SQLALCHEMY_TRACK_MODIFICATIONS‘] = True # 跟踪改变 # app.config[‘SQLALCHEMY_ECHO‘] = True # 打印对应的sql，此操作用sql是怎么样的 @app.route(‘/reg/‘, methods=[‘GET‘, ‘POST‘])def reg(): if request.method == ‘POST‘ and request.is_xhr: # 如果是post请求，并且是ajax请求 return jsonify(request.form) return render_template(‘reg-user.html‘) # 用于验证用户是否已经存在@app.route(‘/checkuser/‘)def check_user(): names = [‘name1‘, ‘name2‘, ‘name1‘, ‘name1‘, ‘name1‘, ] # 定义已存在的用户名，实际应该去数据库查 name = request.args.get(‘username‘, ‘‘) return jsonify(name.lower() not in names) # 转成小写判断新注册的用户名是否已存在，返回json格式的true或false if __name__ == ‘__main__‘: app.run(debug=True)
页面
拦截
通过
原文地址：https://www.cnblogs.com/zhongyehai/p/11569844.html
时间： 2024-08-25 11:00:31