How can I use a cursor.forEach() in MongoDB using Node.js?

Question

I have a huge collection of documents in my DB and I\'m wondering how can I run through all the documents and update them, each document with a different value.

Answer 1

And here is an example of using a Mongoose cursor async with promises:

new Promise(function (resolve, reject) {
  collection.find(query).cursor()
    .on('data', function(doc) {
      // ...
    })
    .on('error', reject)
    .on('end', resolve);
})
.then(function () {
  // ...
});

Reference:

• Mongoose cursors
• Streams and promises