Why doesn't findRandom() work in mongoose for node.js?

Question

JavaScript

Circuit description:

var mongoose = require("mongoose");
var random = require('mongoose-random');

var productSchema = new mongoose.Schema(
    {
        Name: String,
        Description: String,
        Price: Number,
        Category:  String
    },
    {
        collection: 'sportsStore'
    }
)
productSchema.plugin(random, {path: 'r'});

var products = mongoose.model('sportsStore', productSchema);
module.exports = products;

Where findRandom() is called

getRandomProducts: function (count) {
        products.findRandom().limit(count).exec(function(error, result) {
            console.log(result);
        })

In the console we get [].
There are documents in the collection, a simple find() works. Where is the problem? Tell me, please.

Answer 1

This plugin adds a field to the model, which is then used for sorting, respectively, if you have documents in the collection that were not added through this model (with the plugin connected), you need to add fields to existing documents:

// if you have an existing collection, it must first by synced.
// this will add random data for the `path` key for each doc.
Song.syncRandom(function (err, result) {
  console.log(result.updated);
});