validation - express-validator中的错误后停止执行流程

我正在使用express-validator在Express中的request对象上进行表单验证。我执行以下操作：

req.onValidationError(function(msg) {
    res.render('signup', { error: msg });
});

req.check('email', 'Please enter a valid email.').len(1,256).isEmail;
req.check('password', 'Your password must be at least 8 characters.').len(8,256);

var user = {
    email: req.body.email,
    password: req.body.password
};

User.create(user, function(err, result) {
    console.log(err, result);
});

res.render('signup');

问题是执行流连续不断，并且它在执行我的User.create()方法时尝试两次渲染相同的资源。由于尝试了双重渲染，它还会抛出Error: Can't use mutable header APIs after sent.。

如何防止这种情况发生？

最佳答案

见https://github.com/ctavan/express-validator#readme

var errors = [];
req.onValidationError(function(msg) {
    //res.render('signup', { error: msg });
    errors.push(msg);
});

req.check('email', 'Please enter a valid email.').len(1,256).isEmail;
req.check('password', 'Your password must be at least 8 characters.').len(8,256);

if (errors.length) return res.render('signup', { error: errors.join('\n') });

var user = {
    email: req.body.email,
    password: req.body.password
};

User.create(user, function(err, result) {
    console.log(err, result);
});

res.render('signup');

关于validation - express-validator中的错误后停止执行流程，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/8771148/