Error No Firebase App DEFAULT has been created - call Firebase App initializeApp

Question

I have a firebase database linked up to two apps  one being an iOS app and another being a web app coded in node js which is a basic algorithm that sets data to the database  When ever i am running the algorithm i am confronted with-     Error  No Firebase App   DEFAULT   has been created - call Firebase   App initializeApp          at Error  native        at R   Users dd Desktop Code NODE node modules firebase app-node js 22 335        at a   Users dd Desktop Code NODE node modules firebase app-node js 20 68        at Object c  as database    Users dd Desktop Code NODE node modules firebase app-node js 21 447        at Object    Users dd Desktop Code NODE Bot js 24 25        at Module  compile  module js 570 32        at Object Module  extensions  js  module js 579 10        at Module load  module js 487 32        at tryModuleLoad  module js 446 12        at Function Module  load  module js 438 3        at Module runMain  module js 604 10        at run  bootstrap node js 394 7        at startup  bootstrap node js 149 9        at bootstrap node js 509 3 dd-mac NODE dd    Could someone please help

User · Answer

I found the solution  Follow these steps  Flutter Firebase and Android issue - unable to Initialise  Cannot find google-services json with latest migration instructions executed After that  execute  flutter build apk --debug flutter build apk --profile flutter build apk --release  and then  run app  it works for me

User · Answer

Flutter web For me the error occurred when I run my application in  quot release quot  mode flutter run -d chrome --release and when I deployed the application on the Firebase hosting firebase deploy Solution Since I initialized Firebase in the index html  I had to change the implementation order of firebase and main dart js  lt script gt    var firebaseConfig       apiKey   quot xxxxxxxxxxxxxxxxxxxxxx quot     authDomain   quot xxxxxxxxxxx firebaseapp com quot     databaseURL   quot https   xxxxxxxxxx firebaseio com quot     projectId   quot xxxxxxxxxxx quot     storageBucket   quot xxxxxxxx appspot com quot     messagingSenderId   quot xxxxxxxxxxx quot     appId   quot 1 xxxxxxxxxx web xxxxxxxxxxxxx quot     measurementId   quot G-xxxxxxxxx quot            Initialize Firebase   firebase initializeApp firebaseConfig     firebase analytics     lt  script gt     moved below firebase init  lt script src  quot main dart js quot  type  quot application javascript quot  gt  lt  script gt

User · Answer

add async in main   and await before follow my code void main   async     WidgetsFlutterBinding ensureInitialized      await Firebase initializeApp      runApp MyApp        class MyApp extends StatelessWidget     var fsconnect   FirebaseFirestore instance     myget   async       var d   await fsconnect collection  quot students quot   get           print d docs 0  data          for  var i in d docs          print i data                   override   Widget build BuildContext context        return MaterialApp          home  Scaffold        appBar  AppBar          title  Text  Firebase Firestore App                   body  Column          children   lt Widget gt             RaisedButton              child  Text  send data                onPressed                     fsconnect collection  quot students quot   add                    name    sarah                    title    xyz                    email    sarah gmail com                                   print  quot send    quot                                          RaisedButton              child  Text  get data                onPressed                     myget                  print  quot get data     quot

User · Answer

The answer may already be given somewhere but here is my take to this error which may be thrown for multiple reasons   Default app is initialized after the other one  Correct way is to initialize the default app first and then the rest  firebase apps app   is being called before default app initialization  This code is basically returning the default app instance  Since it is not present  hence the error  Lastly  you are initializing other firebase services like auth  database  firestore  etc before app is initialized

User · Answer

YOU CALL THIS IN JADE  firebase initializeApp config   IN THE BEGIN OF THE FUNC  script      function signInWithGoogle             firebase initializeApp config           var googleAuthProvider   new firebase auth GoogleAuthProvider         firebase auth   signInWithPopup googleAuthProvider           then function  data               console log data                      catch function error               console log error

User · Answer

I think This Error is Arrived Because of You are using Class Component in Respective React Platform that Doesn t get Proper Configuration  So You Write Configuration in componentWillMount    componetWillMount     const config     apiKey     xxxxxxxxxxxxxxxxxxxxxxxx     authDomain     auth-bdcdc firebaseapp com 20     databaseURL     https   auth-bdcdc firebaseio com 7     projectId     auth-bdcdc     storageBucket     auth-bdcdc appspot com 2     messagingSenderId     xxxxxxxxxx

User · Answer

Complete tutorial source link   Use initializeApp before  NgModule  import   NgModule   from   angular core   import   BrowserModule   from   angular platform-browser   import   RouteReuseStrategy   from   angular router    import   IonicModule  IonicRouteStrategy   from   ionic angular   import   SplashScreen   from   ionic-native splash-screen ngx   import   StatusBar   from   ionic-native status-bar ngx    import   AppComponent   from    app component   import   AppRoutingModule   from    app-routing module   import   environment   from  src environments environment   import   AuthenticateService   from    services authentication service   import   AngularFireAuthModule   from   angular fire auth    import   as firebase from  firebase    firebase initializeApp environment firebase     NgModule     declarations   AppComponent     entryComponents        imports        BrowserModule       IonicModule forRoot         AppRoutingModule      AngularFireAuthModule        providers        StatusBar      SplashScreen      AuthenticateService        provide  RouteReuseStrategy  useClass  IonicRouteStrategy          bootstrap   AppComponent     export class AppModule

User · Answer

You are probably invoking firebase before the app is initialized  All calls to firebase  must come after  initializeApp     firebase initializeApp config   var db   firebase firestore

User · Answer

I had a similar issue following Firebase s online guide found here   The section heading  Initialize multiple apps  is misleading as the first example under this heading actually demonstrates how to initialize a single  default app  Here s said example      Initialize the default app var defaultApp   admin initializeApp defaultAppConfig    console log defaultApp name         DEFAULT       Retrieve services via the defaultApp variable    var defaultAuth   defaultApp auth    var defaultDatabase   defaultApp database            or use the equivalent shorthand notation defaultAuth   admin auth    defaultDatabase   admin database      If you are migrating from the previous 2 x SDK you will have to update the way you access the database as shown above  or you will get the  No Firebase App   DEFAULT   error   Google has better documentation at the following    INITIALIZE  https   firebase google com docs database admin start SAVE  https   firebase google com docs database admin save-data RETRIEVE  https   firebase google com docs database admin retrieve-data

User · Answer

My problem was because I added a second parameter   AngularFireModule initializeApp firebaseConfig   reservas     if I remove the second parameter it works fine   AngularFireModule initializeApp firebaseConfig

User · Answer

This may not be best answer but  I had to initialize app with admin and firebase like below  I use admin for it s own purposes and firebase as well   const firebase   require  firebase    const admin   require  firebase-admin     admin initializeApp functions config   firebase   firebase initializeApp functions config   firebase      Get the Auth service for the default app var authService   firebase auth      function createUserWithEmailAndPassword request  response            const email   request query email          const password   request query password          if   email                response send  query email is required                 return                    if   password                response send  query password is required                 return                    return authService createUserWithEmailAndPassword email  password               then success   gt                    let responseJson   JSON stringify success                   console log  createUserWithEmailAndPassword responseJson   responseJson                   response send responseJson                               catch error   gt                    let errorJson   JSON stringify error                   console log  createUserWithEmailAndPassword errorJson   errorJson                   response send errorJson

User · Answer

If you are starting out a react-native app and seeing this issue  then you have to follow all the instructions listed in firebase  when you setup iOS android app  or the instructions   React-native google auth android DEVELOPER ERROR Code 10 question

[javascript] Error: No Firebase App '[DEFAULT]' has been created - call Firebase App.initializeApp()

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