findOne works but not get all/find

Question

findOne works fine

db.collection('updates', function (err, collection) {
        collection.findOne({
            author: req.user._id
        }, function (err, doc) {
        }
 });

I'm trying to get all the documents instead of just one. I'm changing findOne to find (shown below) and it doesn't work. How do I fix this?

        db.updates.find({
            author: req.user._id
        }, function (err, doc) {
        }

The error message: It's saying Cannot call method "find" of undefined, meaning the collection isn't being recognized.

Update: This doesn't work either:

db.collection('updates', function (err, collection) {
        collection.find({ //changed findOne to find
            author: req.user._id
        }, function (err, doc) {
        }
 });

Answer 1

It looks like you're using Native MongoDB Node.JS Driver to query your database. According to its readme, you should use .toArray() method to instantiate MongoDB cursor, returned from .find() call:

collection.find({
  author: req.user._id
}).toArray(function (err, docs) {
  // docs is an Array of documents here
});

If you have troubles with Native MongoDB Node.JS Driver, I would suggest using some wrapper around it with more intuitive API, e.g.:

• mongojs
• monk
• mongoskin