MongoDB: how to find 10 random document in a collection of 100?

Question

Is MongoDB capable of funding number of random documents without making multiple queries?

e.g. I implemented on the JS side after loading all the document in the col

Answer 1

Since 3.2 there is an easier way to to get a random sample of documents from a collection:

$sample New in version 3.2.

Randomly selects the specified number of documents from its input.

The $sample stage has the following syntax:

{ $sample: { size: } }

Source: MongoDB Docs

In this case:

db.products.aggregate([{$sample: {size: 10}}]);