How to access multiple Realtime Database instances in Cloud Functions for Firebase

Question

I\'m using multiple databases in a Firebase project. Cloud functions for the main (default) database work great, however, I cannot make them work for a secondary database. F

Answer 1

With cloud functions > 1.1 now, here is the documentation link that saved my life on this issue.

https://firebase.google.com/docs/database/usage/sharding#connect_your_app_to_multiple_database_instances

So, it looks like this at the top of my my cloud function index.js :

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();

const dev = admin.initializeApp({
  databaseURL: "https://appdev.firebaseio.com"
}, 'dev');

const v2 = admin.initializeApp({
  databaseURL: "https://appv2.firebaseio.com"
}, 'v2');

and then, in my clond functions functions code I can do :

//will change stuff on default database
admin.database().ref().child(`stuff/${stuffId}`).set(myStuff)

//will change stuff on my dev database
admin.database(dev).ref().child(`stuff/${stuffId}`).set(myStuff)

//will change stuff on my v2 database
admin.database(v2).ref().child(`stuff/${stuffId}`).set(myStuff)