Keep getting "Firebase App named '[DEFAULT]' already exists." with copy & paste code from new console

[Frangeris Peguero]

Hey guys, I just copy & paste the code generate in the new firebase google console:

  var config = {

    apiKey: "...",

    authDomain: "...",

    databaseURL: "...",

    storageBucket: "",

  };

  firebase.initializeApp(config);

Using this version on npm:

 "firebase": "^3.0.2"

I just keep getting this error on console, and I don't know where is the issue....

Uncaught Error: Firebase App named '[DEFAULT]' already exists.

I'm not using multiples Apps explained https://firebase.google.com/docs/web/setup#advanced_usage, I just have 1 app inside firebase

Any help please, thank you...

[Chris Raynor]

Hey Frangeris,

It looks like you're trying to initialize the SDK multiple times (maybe in a loop or in multiple files?) You should only initialize it once for the app (assuming you're only connecting to one project). It will then be initialized and available everywhere

Hope this helps

Chris

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[Frangeris Peguero]

Yep, that was the issue...

[Brandon Paquette]

what's the suggested guidance for browserify/webpack workflows? jam it into index.html, api key & all?

previously i just made a ref wherever i needed one. assuming i can still do that once i knock out the top-level firebase initialization?

[Kato Richardson]

Brandon,

You can still create a ref any time you want. The equivalent to the old new Firebase(URL) is firebase.database().ref(URL); There’s no need to initialize everything each time you want one.

I’m not familiar enough with webpack/browserify to say if you need a shim or just to call the initializeApp() in some initialization workflow, but this is the part that should be called exactly once.

☼, Kato

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[Ron Royston]

            firebase.app().delete().then(function() {
                console.log("[DEFAULT] App is Gone Now");
            });

[Mark Essel]

what about this use case: two different databaseAuthVariableOverride uids

  firebase.initializeApp({
    databaseURL: config.Firebase.databaseURL,
    serviceAccount: {
      projectId: config.Firebase.projectId,
      clientEmail: config.Firebase.clientEmail,
      privateKey: config.Firebase.privateKey
    },  
    databaseAuthVariableOverride: {
      uid: uidA
    }
  });



  firebase.initializeApp({
    databaseURL: config.Firebase.databaseURL,
    serviceAccount: {
      projectId: config.Firebase.projectId,
      clientEmail: config.Firebase.clientEmail,
      privateKey: config.Firebase.privateKey
    },  
    databaseAuthVariableOverride: {
      uid: uidB
    }
  });

In one case I have a wrapper I use around firebase (in most of my code). In the other I have some old direct usage with a different uid

getting the same error Error: Firebase App named '[DEFAULT]' already exists.]

[Jacob Wenger]

Hey Mark,

You can use the second argument to firebase.initializeApp() to give each app instance a unique name:

var configA = {

  databaseURL: config.Firebase.databaseURL,

  serviceAccount: {

    projectId: config.Firebase.projectId,

    clientEmail: config.Firebase.clientEmail,

    privateKey: config.Firebase.privateKey

  },   

  databaseAuthVariableOverride: {

    uid: uidA

  }

};

firebase.initializeApp(configA, 'appA');

var configB = {

  databaseURL: config.Firebase.databaseURL,

  serviceAccount: {

    projectId: config.Firebase.projectId,

    clientEmail: config.Firebase.clientEmail,

    privateKey: config.Firebase.privateKey

  },   

  databaseAuthVariableOverride: {

    uid: uidB

  }

};

firebase.initializeApp(configB, 'appB');

Cheers,

Jacob

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[gmail]

got it thanks a bunch. It's working with the advanced usage: let db = firebase.intializeApp(), the unique name, and db.database etc now

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[Mark Essel]

this helped clarify (even though it's server side)

https://firebase.google.com/docs/web/setup#advanced_usage

I have different connections with different server users with customized permissions

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[roger deutsch]

This solved my problem too.  I was getting the same error and found this link and discovered I was initializing the SDK multiple times in my javascript.  After I discovered what was wrong (thanks to this post) it was an easy fix.

Thanks