'.then(...).catch' not a function

Hi,

I just encountered this issue while working with promise queries. For example:

users.find({})
  .then(data => {
    res.json(data);
  })
  .catch(err => {
    errors.db(err);
  });

works fine if only the .then(...) is present, but catch gets reported as not being a function.

[oreqizer]

users.findOne({
    name: req.params.username
  })
  .then(data => {
    if (!data) {
      let err = new Error();
      err.status = 404;
      return next(err);
    }
    res.json(data);
  }, err => {
    next(err);
  });
//  .error(err => {
//    next(err);
//  });

This works. However, .error(fn) does not work either for me - error gets replaced by users.findOne(...).then(...).error is not a function.

[mathieudutour]

fixed in #132 🎉