您好,感谢您的阅读。我尝试使用快速验证器。如果名称输入为空,它可以正常工作并阻止帖子。但我不知道如何才能在正面收到错误消息。我尝试了很多事情都没有成功。希望有人可以提供帮助,并对消息的大小感到抱歉。如果可以提供帮助,这里是快速验证器文档的链接(https://express-validator.github.io/docs/)
我的代码...我创建了一个基本表单:
<form id="sign-in">
<div class="form-group">
<label for="nom">name</label>
<input id="name" type="text" class="form-control" placeholder="name" autocomplete="family-name">
</div>
<div class="form-group">
<label for="username">username</label>
<input id="username" type="text" class="form-control" placeholder="username" autocomplete="given-name">
</div>
<div class="form-group">
<label for="email">email</label>
<input id="email" class="form-control" type="email" placeholder="monemail@gmail.com" autocomplete="email"></input>
</div>
<div class="form-group">
<label for="password">password</label>
<input id="password" class="form-control" type="password" autocomplete="current-password"></input>
</div>
<div class="form-group">
<label for="confirm-password">confirm-password</label>
<input id="confirm-password" class="form-control" type="password" autocomplete="current-password"></input>
</div>
<button type="submit" class="btn btn-primary">sign-in</button>
</form>
</section>
<footer>
</footer>
<script type="module" src="/js/sign-in.js"></script>
然后我对文件 sign-in.js 进行提取:
document.getElementById('sign-in').addEventListener('submit', event => {
event.preventDefault()
const name = document.getElementById('name').value
const username = document.getElementById('username').value
...
// Use fetch to post data into the DB
window.fetch(`${config.serverHost}/sign-in`, {
method: 'post',
body: JSON.stringify({
name,
username,
...
})
}).then((res, errors) => {
if (res.status === 200) {
window.parent.location.reload()
} else if (res.status === 422) {
DONT KNOW WHAT TO DO TO GET MY ERROR MESSAGE
}
})
})
最后是服务器端:
app.post('/sign-in', (req, res, next) => {
// Start express validator //
req.checkBody('name', 'Please write your name').notEmpty()
req.checkBody('username', 'Please write your name').notEmpty()
...
const errors = req.validationErrors()
if (errors) {
SEND ME BACK MY ERROR MESSAGE
} else {
this part works fine, thank you
}
})