MongoDB: Get single document with specific parent id and highest order value

Question

My documents have the key order , which is an ascending numeric value.

Now I would like to get the highest order value of all documents which has a specific parent value.

What I am doing is (I'm using mongo native driver)

• find all documents with the specific parent id
• sort the result in descending order
• limit to 1 document

I'm doing this, as I think findOne can't sort the documents. Am I right with that?

const last = await Content.find({ parent: parentID }).sort({ order: -1 }).limit(1).toArray()
console.log(last[0].order)

Now I get an array with a single document. But is it possible to get only the document itself without returning the result as an array?

Answer 1

You want to use findOne like this:

var options = {
    "sort": [['order','desc']]
};

Content.findOne({ parent: parentID }, options, function(err, result) {
    if (err) throw err;
    console.log(result);
});