firebase.getDatabase()).ref() is not a function

Question

Hello I'm doing a project shcool on nodeJS and work with firebase. I try to get the name of a users to not rewrite an existing value. the db is:

my code to try something:

serv.js

const firebaseConfig = {
  apiKey: process.env.REACT_APP_API_KEY,
  authDomain: process.env.REACT_APP_AUTHDOMAIN,
  databaseURL: process.env.REACT_APP_DATABASEURL,
  projectId: process.env.REACT_APP_PROJECTID,
  storageBucket: process.env.REACT_APP_STORAGEBUCKET,
  messagingSenderId: process.env.REACT_APP_MESSASGINGSENDERID,
  appId: process.env.REACT_APP_APPID,
  measurementId: process.env.REACT_APP_MEASUREMENTID
};

const {initializeApp} = require('firebase/app');
const {getDatabase} = require('firebase/database');
const {getAuth, signInWithEmailAndPassword, createUserWithEmailAndPassword} = require('firebase/auth');

const fireapp = initializeApp(firebaseConfig);
const db = getDatabase(fireapp);
var firebaseauth = getAuth(fireapp);
[...]

function create_entry_name(name, email)
{
  const ref = db.ref('/users/' + name);

  ref.on('value', (snapshot) => {
    console.log(snapshot.val());
  }, (errorObject) => {
    console.log('The read failed: ' + errorObject.name);
  });
}

that's litteraly the example on the firebase website.

But I get an error witch is:

db.ref is not a function

I will really be thanks full if you have an solution for this problem...

Do you know for sure if you're initializing/stating db properly? Try console logging it and see if it is what you expect. — insyri
– insyri, Commented Nov 19, 2021 at 17:39
To be honest I don't really know what I expect to get from db, I consoled log him but that doesn't give me a clue... @insyri — scorval
– scorval, Commented Nov 19, 2021 at 17:45
ooof there is so much wrong here. Follow the docs here firebase.google.com/docs/database/web/start — Brian McCall
– Brian McCall, Commented Nov 19, 2021 at 18:08
Hello, so I updated my code with the firebase tuto and your help but I get the exact same error... @BrianMcCall — scorval
– scorval, Commented Nov 20, 2021 at 16:49

Dharmaraj · Accepted Answer · 2021-11-20 17:10:04Z

3

You are using Modular SDK (v9.0.0+) but using syntax of older name-spaced syntax. Try refactoring the code as follows:

import { getDatabase, ref, onValue} from "firebase/database";

function create_entry_name(name, email) {
  const ref = ref(db, '/users/' + name);

  onValue(ref, (snapshot) => {
    const data = snapshot.val();
    console.log(data)
  });
}

You can find more details about the new syntax in the documentation.

answered Nov 20, 2021 at 17:10

Dharmaraj

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1 Comment

Adrian Bartholomew Over a year ago

It's so frustrating. I see NONE of that new syntax in the docs.

Patrick Kelly · Accepted Answer · 2021-11-19 18:12:00Z

0

Call the getDatabase directly. It's already initialized.

const db = getDatabase();
const ref = db.ref('/users/'+ name);

answered Nov 19, 2021 at 18:12

Patrick Kelly

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1 Comment

scorval Over a year ago

Code Updated and same error

danh · Accepted Answer · 2021-11-19 18:18:42Z

0

Build the app from the app library...

import { firebaseApp } from 'firebase/app';
const app = initializeApp({/*config*/});

Then get the database from the initialized app. Note that the OP fails to pass a param to getDatabase...

const db = getDatabase(app);

const ref = db.ref('users/' + name);
// etc...

edited Nov 19, 2021 at 18:18

answered Nov 19, 2021 at 18:12

danh

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1 Comment

scorval Over a year ago

Hello, so I updated my code with the firebase tuto and your help but I get the exact same error...@danh

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