example.js

router.get('/', function (req, res, next) {
  // maybe validate that some filter criteria are sent?
  debug('QUERY', req.query.q);
  if (!req.query.q || req.query.q.length < 3) {
    return next(new Error("'q' must be three or more characters"));
  }
  var results = Leads.search(req.query.q || '').then(function (results) {
    debug('number of leads: ' + results.length);
    res.json(results);
  }).catch(next);
});