// ...rest of the initial code omitted for simplicity.
const { check, validationResult } = require('express-validator/check');
app.post('/user', [
// username must be an email
check('username').isEmail(),
// password must be at least 5 chars long
check('password').isLength({ min: 5 })
], (req, res) => {
// Finds the validation errors in this request and wraps them in an object with handy functions
const errors = validationResult(req);
if (!errors.isEmpty()) {
return res.status(422).json({ errors: errors.array() });
}
User.create({
username: req.body.username,
password: req.body.password
}).then(user => res.json(user));
});
{
"errors": [{
"location": "body",
"msg": "Invalid value",
"param": "username"
}]
}
return res.status(422).json({ errors: errors.array() });
errors.array() - ваши ошибки. Передавайте их в шаблон свой -
res.render('home', {errors: errors.array()});{{# if errors }}
{{# each errors }}
<p class="alert alert-danger">{{ this.msg }}</p>
{{/each}}
{{/if}}
