auto increment Id generator in firebase real-time database

Question

I'm using firebase real-time database with express.js as backend. Here's my data saving snippet code:

const db = require('./firebase_connection').firebaseDatabase

async function saveData(req, model) {
    await db.ref(model).set(req)
    return {"statusCode": "201", "message": "Inserted successfully"}
}

module.exports = { saveData }

This is the json output:

{
  "user" : {
    "email" : "TEST77@TEST.com",
    "full_name" : "Hossein Heydari",
    "password" : "test",
    "phone_number" : 54,
    "role" : "client"
  }
}

But I also need an Id added to database automatically, just like what MongoDB has which is _id

I need firebase to store data with a auto increment Id for any model, what should I do?

score 5 · Accepted Answer · answered Apr 29 '21 at 07:57

So, firebase does provide a way to get the unique key when you push the changes, I am not sure if you have tried this:


postsRef.push({
  author: "gracehop",
  title: "Announcing COBOL, a New Programming Language"
});

// Generate a reference to a new location and add some data using push()
var newPostRef = postsRef.push();

// Get the unique key generated by push()
var postId = newPostRef.key;

You can check here for more details.

Or, if you want to create similar what Mongo does then you should create a custom one, create a similar key like Mongo does and keep it in the DB and on every new insert add that ID to the model. You can check here.

auto increment Id generator in firebase real-time database

1 Answers1