mongoos-mongodb3.6.js

// run it with: /usr/local/bin/node -r babel-register mongoos-mongodb3.6.js
import mongoose from 'mongoose'
import TestModel from './TestMongooseModel'

(async () => {


  /*
   https://docs.mongodb.com/manual/reference/connection-string/#urioption.authSource
   https://github.com/Automattic/mongoose/issues/6041
    */
  
  // works
   //const url = 'mongodb://<user>:<pass>@test-shard-<1>.mongodb.net:<port>,test-shard-<2>.mongodb.net:<port>,test-shard-<3>.mongodb.net:<port>/<appDB>?ssl=true&authSource=admin'

  // does not work
  const url = 'mongodb+srv://<user>:<pass>@<host>.mongodb.net/admin?authSource=<appDB>'

  //const mongoAutoIndex = (process.env.MONGODB_AUTOINDEX || 'false')
  const mongoAutoIndex = true

  // http://mongodb.github.io/node-mongodb-native/2.2/api/MongoClient.html#connect
  var options = {autoIndex: mongoAutoIndex, autoReconnect: true, reconnectTries: Number.MAX_VALUE, poolSize: 10 }

  const connectStatus = await mongoose.connect(url, options)

  // confirm we can save a mongoose mapped object to MongoDB
  let modelInstance = new TestModel({
    clientId: `Test2${Date.now()}`,
    clientSecret: 'A Client secret'
  })

  // FAILS on this line. 
  await modelInstance.save()
  const modelInstances = await TestModel.find()
  console.log(modelInstances)
  process.exit(0)
})().catch(err => {
  console.log(err.stack)
  process.exit(1)
})

// TestMongooseModel: seprate file 
const mongoose = require('mongoose')
const Schema = mongoose.Schema

var TestMongooseModelSchema = new Schema({
  clientId: {type: String, index: true, unique: true, required: true},
  clientSecret: String,
  redirectUri: String
})

TestMongooseModelSchema.index({clientId: 1, clientSecret: 1}, { unique: true, background: true, sparse: true })


let TestMongooseModel = mongoose.model('test_mongoose_model', TestMongooseModelSchema)
module.exports = TestMongooseModel