mongoomise

promisify mongoose by any promise library

Support List

• bluebird
• Q
• when.js
• RSVP
• es6-promise

Default Usage

 
var mongoose = require('mongoose')
 
// load your models first
var User = mongoose.mode('User', UserSchema)
//...
 
 
// choose your fav library
require('mongoomise').promisifyAll(mongoose, require('bluebird'))
// require('mongoomise').promisifyAll(mongoose, require('q'))
// require('mongoomise').promisifyAll(mongoose, require('rsvp'))
// require('mongoomise').promisifyAll(mongoose, require('when'))
// require('mongoomise').promisifyAll(mongoose, require('es6-promise'))
 
// start flying
User.findOneAsync().then(function(user){
    user.pv += 1
    return user.saveAsync()
}).then(function(results){
    console.log(results)
})
 

Multipe Connections

 
var mongoose = require('mongoose')
var mongoomise = require('mongoomise')
var connection = mongoose.createConnection('..')
 
//load models
var User = connection.model('User', UserSchema)
var UserX = mongoose.model('User', UserSchema)
//...
 
//just promisify the connection, the mongoose will be auto promisified
mongoomise.promisifyAll(connection, require('bluebird'))
 
// start flying
User.findOneAsync().then(function(user){
    user.pv += 1
    return user.saveAsync()
}).then(function(results){
    console.log(results)
    UserX.findOneAsync()
    // ...
})
 

Updated

• support promisify connection from mongoose.createConnection
• add a test for mongoose.createConnection
• support promisify custom Schema static methods

TODO

• support custom instance methods

Notes

• Do I have to change my existing mongoose related code? No, just follow your old style.
• Does hooks like Schema.pre work as usual? Yes. some useful discussion here
• Does it support custom model static method? Yes!
• mongoomise.promisifyAll should be invoked after all models are loaded

mongoose basics

• your models extends from mongoose.Model
• schemas are stored on global mongoose but models may not
• mongoose.models.ModelName equals to mongoose.model('ModelName')
• ModelName.schema equals to mongoose.modelSchemas.ModelName
• static methods should be extended on mongoose.Model with a dynamic context
• instance methods should be extended on mongoose.Model.prototype
• custom model static methods are stored in MyModel.schema.statics
• connection instance store its own models
• it will lookup to mongoose when no models found on connection

Test

mocha ./test/mocha

Benchmark

node benchmark

the benchmark contains:

• bluebird - using bluebird.promisifyAll(mongoose)
• mongoomise/bluebird - using mongoomise with bluebird
• mongoomise/Q - using mongoomise with Q
• mongoomise/RSVP - using mongoomise with RSVP
• mongoomise/when - using mongoomise with when.js
• mongoomise/es6Promise - using mongoomise with es6-promise

in my MacAir, mongoomise/bluebird win the championship.