MongoDB and Mongoose - Delete Many Documents with model.remove()

[skaparate]

Affected page

The lesson at https://www.freecodecamp.org/learn/apis-and-microservices/mongodb-and-mongoose/delete-many-documents-with-model-remove doesn't work with mongoose 6+ because now it just returns the deletedCount, which causes the code from server.js, lines 343 through 351, to fail.

Mongoose 6.0.1

Mongoose 5.4.13:

This would fix it:

if (data.ok === undefined) {    
    try {
        if ("object" === typeof data && Object.keys(data).length === 1) {
            // for mongoose v6
            data.ok = true;
            data.n = data.deletedCount;
        } else {
            // for mongoose v4
            data = JSON.parse(data);
        }
    } catch (e) {
        console.log(e);
        return next(e);
    }
}

[skaparate]

Now that I think of it, why does the boilerplate need to be backwards compatible with older versions of mongoose? I mean, the student would install the latest version always, right?

[ShaunSHamilton]

Thanks, for brining this up.

We have discussed versioning in the lessons. I think we just missed this one.

Solution
Require Campers to install specific versions of mongodb and mongoose in the first lesson: https://www.freecodecamp.org/learn/apis-and-microservices/mongodb-and-mongoose/install-and-set-up-mongoose

Typically, we have gone with allowing only patch versions. So, the sentence should be something along the lines of:

Add mongodb@~3.6.0 and mongoose@~5.4.0 to the project’s package.json.

Does this sound about right?

[skaparate]

I see!

That sentence seems right to me and definitely would solve the problem without modifying the boilerplate

[ShaunSHamilton]

An issue with the help wanted or first timers only label is open for contribution. The first comprehensive PR created will be reviewed and merged. We typically do not assign issues to anyone other than long-time contributors.

If you would like to contribute, and have not read the contributors docs, please do so here: https://contribute.freecodecamp.org/#/

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[skaparate]

I'll create the PR 👍🏽

[majestic-owl448]

@skaparate note that you are not a first timer contributor

[13cbenjamin]

I would like to create a PR for this as I am a first time contributor and I reported this issue on the FCC forum. It will be a few hours until I can submit. I understand these are not assigned so if it's still open when I'm home, I'll gladly take it as my first contribution.

[skaparate]

@skaparate note that you are not a first timer contributor

That's right! I didn't read the first timers only 😅 🤦🏽‍♂️