Handling empty promises

rejectIfNil.js

// What is your opinion on the use of this function?
function rejectIfNil(msg) {
  return payload => {
    if (!payload) return Promise.reject(new Error(msg))
    return payload
  }
}

function update(_id) {
  return User
    .findOneAndUpdate({ _id }, { $set: { updated: true } }, { new: true })
    .exec()
    .then(rejectifNil(`Couldn't find user to update`))
    .then(sendToView)
}

// Could this be improved? Thank you!

Solvable by Either.fromNullable + eitherToTask