nodejs - mongodb native find all documents

Question

Following an example from the mongodb manual for nodejs, I am finding all documents from a db as follows

mongo.Db.connect(mongoUri, function (err, db) {
             


        

Answer 1

The easiest way is to use a Cursor (reference):

var cursor = db.collection('test').find();

// Execute the each command, triggers for each document
cursor.each(function(err, item) {
    // If the item is null then the cursor is exhausted/empty and closed
    if(item == null) {
        db.close(); // you may not want to close the DB if you have more code....
        return;
    }
    // otherwise, do something with the item
});

If there's a lot of computation you need to do, you might consider whether a Map-Reduce (reference) would fit your needs as the code would execute on the DB server, rather than locally.