This works in Sails v0.10.0-rc7 (Waterline v0.10.0-rc12)

waterline.sails.mongo.native.example.js

/**
 * PetController
 *
 * @description :: Server-side logic for managing pets
 * @help        :: See http://links.sailsjs.org/docs/controllers
 */

module.exports = {
    index: function (req,res) {
    	
        // Grab an instance of the mongo-driver    
        Pet.native(function(err, collection) {
            if (err) return res.serverError(err);

            // Execute any query that works with the mongo js driver    
            collection.find({}, {
                name: true
            }).toArray(function (err, results) {
                if (err) return res.serverError(err);
                console.log('->',results);
                return res.ok(results);
            });
        });
    }
};

       Friend.native(function(err, collection) {
          if (err) return res.serverError(err);

          collection.find({}, {
            friend1: true
          }).toArray(function (err, results) {
            if (err) return res.serverError(err);
              console.log(results);
            next(results);
          });
        });