Aliasing anonymous to identified users

viewsService.js

var ViewsCollection = require('../models/view').collection
var viewSvc = {

  getByUserId(userId, cb)
  {
    if (logging) $log('views.getByUserId'.trace, userId)
    ViewsCollection.find({userId}).sort({_id:-1}).toArray((e, r) => cb(r))
  },

  getByAnonymousId(anonymousId, cb)
  {
    if (logging) $log('views.getByAnonymousId'.trace, anonymousId)
    ViewsCollection.find({anonymousId}).sort({_id:-1}).toArray((e, r) => cb(r))
  },

  alias(anonymousId, userId, cb)
  {
    if (logging) $log('views.alias'.trace, anonymousId, userId)
    userId = ObjectId(userId)
    ViewsCollection.update({anonymousId}, {$set:{userId}}, { multi: true }, cb)
  },

  create(o, cb)
  {
    if (logging) $log('views.create'.trace, o)
    ViewsCollection.insert(o, cb)
  }

}