在nodejs-Express上生成错误时如何保留表单数据

Question

发生错误时如何保留表单数据。通常当表单提交页面重新加载时。我正在使用把手、快速验证器、连接闪存。这是我的注册代码：

//Register User
router.post('/register', function(req, res){
    var name = req.body.name;
    var email = req.body.email;
    var username = req.body.username;
    var password = req.body.password;
    var password2 = req.body.password2;


    //Validation
    req.checkBody('name', 'Name is required!').notEmpty();
    req.checkBody('email', 'Email is required!').notEmpty();
    req.checkBody('email', 'Email is not valid!').isEmail();
    req.checkBody('username', 'Username is required!').notEmpty();
    req.checkBody('password', 'Password is required!').notEmpty();
    req.checkBody('password', 'Minimum Length of Password is 1!').isLength({min: 1});
    req.checkBody('password2', 'Password do not match!').equals(req.body.password);


    var errors = req.validationErrors();
    if(errors){
//want some help here by which if any error generate then all value is automatically filled. So that everytime there is no need to fill full form
        res.render('register', {
            errors: errors
        });
    }else{
//Here Success Part Code runs

    }
});

这段代码是 view part(register.handlebars) //任何帮助将不胜感激。 这个页面是车把。关于显示旧数据的形式，如果表单生成错误Littlebit搞不清 注册

    {{#if errors}}
        {{#each errors}}
            <div class="alert alert-danger">{{msg}}</div>
        {{/each}}
    {{/if}}
    <form method="post" action="/custom/register">
        <div class="form-group">
                    <label>Name</label>
                    <input type="text" name="name" class="form-control" placeholder="Name">
                </div>
                <div class="form-group">
                    <label>Username</label>
                    <input type="text" name="username" class="form-control" placeholder="Userame">
                </div>
                <div class="form-group">
                    <label>Email</label>
                    <input type="email" name="email" class="form-control" placeholder="Password">
                </div>
                <div class="form-group">
                    <label>Password</label>
                    <input type="password" name="password" class="form-control" placeholder="Password">
                </div>
                <div class="form-group">
                    <label>Confirm-Password</label>
                    <input type="password" name="password2" class="form-control" placeholder="Password">
                </div>

                <button type="submit" class="btn btn-success">Submit</button>
    </form>

Answer 1

    //Register User
    router.post('/register', function(req, res){
        var name = req.body.name;
        var email = req.body.email;
        var username = req.body.username;
        var password = req.body.password;
        var password2 = req.body.password2;


    //fields value holder
        var form = {
            nameholder: req.body.name,
            usernameholder: req.body.username,
            emailholder: req.body.email
        };


        //Validation
        req.checkBody('name', 'Name is required!').notEmpty();
        req.checkBody('email', 'Email is required!').notEmpty();
        req.checkBody('email', 'Email is not valid!').isEmail();
        req.checkBody('username', 'Username is required!').notEmpty();
        req.checkBody('password', 'Password is required!').notEmpty();
        req.checkBody('password', 'Minimum Length of Password is 1!').isLength({min: 1});
        req.checkBody('password2', 'Password do not match!').equals(req.body.password);


        var errors = req.validationErrors();
        if(errors){
            res.render('register', {
                errors: errors,
    form:form
            });
        }else{
    //Here Success Part Code runs

        }
    });

//register.handlebars page
//just add value with holder

    <h2 class="page-header">Register</h2>
    {{#if errors}}
        {{#each errors}}
            <div class="alert alert-danger">{{msg}}</div>
        {{/each}}
    {{/if}}
    <form method="post" action="/custom/register">
        <div class="form-group">
                    <label>Name</label>
                    <input type="text" name="name" class="form-control" placeholder="Name" value="{{form.nameholder}}">
                </div>
                <div class="form-group">
                    <label>Username</label>
                    <input type="text" name="username" class="form-control" placeholder="Userame" value="{{form.usernameholder}}">
                </div>
                <div class="form-group">
                    <label>Email</label>
                    <input type="email" name="email" class="form-control" placeholder="Email" value="{{form.emailholder}}">
                </div>
                <div class="form-group">
                    <label>Password</label>
                    <input type="password" name="password" class="form-control" placeholder="Password" >
                </div>
                <div class="form-group">
                    <label>Confirm-Password</label>
                    <input type="password" name="password2" class="form-control" placeholder="Confirm-Password">
                </div>

                <button type="submit" class="btn btn-success">Submit</button>
    </form>