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JavaScript User Authentication With Express and Mongo User Registration Defining a Mongo Schema with Mongoose

Password confirmation - add to DB Schema?

Given the code, is it possible to add a password validation field to the DB? Or just completely unnecessary? (note: I cannot run the code myself as there a bunch of errors with bcrypt that bcrypt.js workarounds aren't fixing for me, hence the question)

Here is my line of thought, if the user mistypes their password, this db entry has no validation to account for that and to my understanding the db entry is created which means its created with a potentially bad password from the users perspective.

Is it possible to create an extra field within the schema object that ensures 'password' === 'password confirmation', else "reject" the entire entry and alert the user to reenter or something like that?

Its possible that this will be answered in the coming videos, just curious.

Current Schema

 email: {
        type: String, // lets them enter a string
        unique: true,//checks for other data / same
        required: true, // forces input
        trim: true //trims unneeded white space

    name: {
        type: String,
        required: true,
        trim: true,

    favoriteBook: {
        type: String,
        required: true,
        trim: true

    password: {
        type: String,
        required: true //trim not added, never manipulate the password (*BP*)
    }//Note there is not a field for confirmation

corresponding form entry

corresponding form entry

2 Answers

Hi NiKole,

The validation you're referring to is actually implemented later in the course. Maybe you haven't got there yet. If you have completed the course, then look in the POST route for "/register." There, you will find the following check that makes sure the user's first password matches their second password:

// confirm that user typed same password twice
if (req.body.password !== req.body.confirmPassword) {
    var err = new Error('Passwords do not match.');
    err.status = 400;
    return next(err);

Thank you! I'm going to go back through that piece because I didn't catch it when I went through it. Saving the code in my notes - thanks! The deeper question that I had is a no though I guess, you can't save something like a count of how many times a user had to try to set up their password before keying it correctly and getting a match because they don't have a "session" or way to store that info prior to having a db entry....right?

(Was thinking in a long term support scenario this might be a way to identify potentially "support heavy" customers up front.)

Actually, you can totally do that! That kind of thing is generally referred to as "analytics." And it's actually very simple to pull off. It'll probably be really difficult — or impossible — to know the exact identity of the person whom had trouble typing their password a second time, but you can definitely store a running count of how many times this "trouble" has occured, historically. This kind of anonymized data is used all the time as raw feedback for UX designers. For example, if, say, 80% of attempts to register produced a "passwords don't match" error, you (as a UX designer) will want to rethink/redesign the information architecture of your app. Hope that helps :)

Yup it does - thanks again. In my realm its BI, glad I wasn't too far off in thinking it was possible. So you can do it, just not using the method I was thinking. You rock!

Seth Kroger
Seth Kroger
56,412 Points

A password confirmation field normally wouldn't be stored in the database. It's only ever used one time, when you set or reset the password. Since it should be exactly the same as the password, there is no reason to store it and it would be duplicate data.

You would check it after it is submitted in your route, or before you submit with some client-side JS.

Not to store "it" itself but rather to store the fact that it matched the first time input...validate it before creating a db entry (before allowing one to be created) by confirming the two match if that makes sense. I've seen this appear as a check box (that yes it did match the first time) in other database applications where security, records, and accountability and even the Business Intelligence behind that fact, matter a bit more. My thinking is that it'd be similar to confirming that a EULA entry has been accepted.

I may be over thinking it for this matter (a sign up form) but the question is valid - is it possible? Perhaps its further in the course, I'm still going through it and we have not yet gone over what that confirmation field is actually spec'd to do.