为什么我会收到 null 消息？

Question

I keep getting a null after testing my register page. Null

This is the code

app.post("/register", function (req, res) {
const newUser = new User({
    email: req.body.email,
    password: req.body.password
});

newUser.save(function (err) {
    if (!err) {
        console.log(err);
    } else {
        res.render("secrets");
    }
});

});

Answer 1

I think thats because you have no errors. You're checking for if (!err) . This statement will print everything inside if block if there are no errors, that's why you're getting null.

I think you should change it to if (err) to avoid entering the if block, if there are no errors