How can I get size (bytes) of a MongoDB collection with Mongoose?

Question

Imagine I have a Mongoose model like this:

mongoose = require('mongoose')
Products = mongoose.model('Products')

How do I get size of the full corresponding collection in bytes? I found db.collection.storageSize , but it's nowhere to be found in the Mongoose API docs.

Answer 1

Mongoose doesn't provide an abstraction for this, but you can access the native driver collection methods like stats() from the collection property of a Mongoose Model. That method provides the collection's size as the storageSize property of the results:

Products.collection.stats(function(err, results) {
    console.log(results.storageSize);
});

Answer 2

var stats = Products.stats(function(err, stats) {
  // second parameter stats contains the result from  stats
  var storageSize = stats.storageSize;
});

gets statistics for Products collection.