Query.prototype.cursor()

Parameters

• [options] «Object»

Returns:

• «QueryCursor»

Returns a wrapper around a mongodb driver cursor. A QueryCursor exposes a Streams3 interface, as well as a .next() function.

The .cursor() function triggers pre find hooks, but not post find hooks.

Example

// There are 2 ways to use a cursor. First, as a stream:
Thing.
  find({ name: /^hello/ }).
  cursor().
  on('data', function(doc) { console.log(doc); }).
  on('end', function() { console.log('Done!'); });
// Or you can use `.next()` to manually get the next doc in the stream.
// `.next()` returns a promise, so you can use promises or callbacks.
const cursor = Thing.find({ name: /^hello/ }).cursor();
cursor.next(function(error, doc) {
  console.log(doc);
});
// Because `.next()` returns a promise, you can use co
// to easily iterate through all documents without loading them
// all into memory.
co(function*() {
  const cursor = Thing.find({ name: /^hello/ }).cursor();
  for (let doc = yield cursor.next(); doc != null; doc = yield cursor.next()) {
    console.log(doc);
  }
});

Valid options

• transform: optional function which accepts a mongoose document. The return value of the function will be emitted on data and returned by .next().