How to count the number of documents in a mongodb collection

Question

I would like to know how to count the number of documents in a collection. I tried the follow

var value = collection.count();
&&
var value = collecti         


        

Answer 1

If you want the number of documents in a collection, then use the count method, which returns a Promise. Here's an example:

let coll = db.collection('collection_name');
coll.count().then((count) => {
    console.log(count);
});

This assumes you're using Mongo 3.

Edit: In version 4.0.3, count is deprecated. use countDocument to achieve the goal.