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why Firebase in C# form app not realtime?


By : trbenton
Date : September 16 2020, 04:00 AM
help you fix your problem By calling the Get method, you're calling the server to get the data only once.
If you want to instead get the data now and then continue to listen for updates, use the OnAsync method. From the linked documentation:
code :
EventStreamResponse response = await _client.OnAsync("chat", (sender, args, context) => {
       System.Console.WriteLine(args.Data);
});

//Call dispose to stop listening for events
response.Dispose();


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Firebase: though I'm setting Data, values are not reflecting lively in realtime database of firebase


By : Trong Trieu Dinh
Date : March 29 2020, 07:55 AM
like below fixes the issue The proper way to open a connection to a Firebase reference is like this...
code :
 //declare the reference as an implicitly unwrapped optional
 var userDB: FIRDatabaseReference!

 //set the value of the reference in viewDidLoad
 override func viewDidLoad(){
     userDB = FIRDatabase().database().reference()
 }
override init(){
   FIRApp.configure()
}

Get Key reference form Firebase Realtime Database


By : Rednip
Date : March 29 2020, 07:55 AM
To fix this issue Have you tried getKey()?
code :
public void onDataChange(DataSnapshot dataSnapshot) {
    ArrayList<String> userlist = new ArrayList<String>();
    ArrayList<String> keylist = new ArrayList<String>();
    for(DataSnapshot dsp : dataSnapshot.getChildren()) {
        userlist.add(String.valueOf(dsp.getValue()));
        keylist.add(dsp.getKey());
    }
    int randpos = new Random().nextInt(userlist.size());
    Object randomitem = userlist.get(randpos);
    String key = keylist.get(randpos);
    Toast.makeText(getBaseContext(), randomitem.toString() + " key:" + key, Toast.LENGTH_LONG).show();
}

What's the difference between using Cloud Functions Firebase Realtime Database Triggers and Admin SDK Firebase Realtime


By : Tori Stiene
Date : March 29 2020, 07:55 AM
hope this fix your issue When registering the on("child_added" in your second snippet, you need a node script that stays active in order to receive those events. If you kill the node script, you will stop receiving child_added events.
Your first snippet would be registered on Google Cloud Functions, which handles the activation/deactivation of the Node.js container for you. In fact, it handles scaling it up and down with the number of events coming in.

Firebase - getting the download URL (Firebase Storage) and saving it in Firebase realtime database


By : user3384823
Date : March 29 2020, 07:55 AM
To fix the issue you can do The getDownloadURL() method is asynchronous and returns a Promise which resolves with the downloadURL.
You therefore need to do something along these lines, using the then() method to wait that the Promise resolves:
code :
  uploadTask.snapshot.ref.getDownloadURL().then(function(downloadURL) {
    console.log('File available at', downloadURL);
  });
let downloadURL;
var filename = filenamechosen;
var storageRef = firebase.storage().ref('/dav' + 'projects' + '/' + filename);
var uploadTask = storageRef.put(selectedFile);

uploadTask.on("state_changed",
null,  /// <- See https://firebase.google.com/docs/reference/js/firebase.storage.UploadTask#on
null,
function(){
   // Upload completed successfully, now we can get the download URL
    uploadTask.snapshot.ref.getDownloadURL()
    .then(function(downloadURL) {
        console.log('File available at', downloadURL);
        uploadOne(downloadURL);  // <- We call the uploadOne function passing the downloadURL as parameter
    });
});


function uploadOne(downloadURL){
    let projectinf = document.getElementById("projectinfo").value;
    let name = document.getElementById("studentname").value;
    let cls = document.getElementById("cls").value;
    let email = document.getElementById("email").value;
    let projectlnk = downloadURL;
    let marks = document.getElementById("marks").value;
    let submitfrm = document.getElementById("submitfrm");
    let studentObj = {
        class: cls,
        email: email, 
        projectinfo: projectinf,
        projectlink: projectlnk,
        marks: "lol",
    }
    firebase.database().ref('/schools/dav/').child(`${name}`).set(studentObj)
    .then(function() {
        console.log("done");
      })
      .catch(function(error) {
        console.log(error);
      });
}

Does Firebase Function reading and writing to Firebase Realtime Database contribute to Firebase Realtime Download?


By : user3656794
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Reading data from the Realtime Database into your Cloud Function is a charged operation.
Note that this only applies to data that you code explicitly read in your Cloud Functions code. The data that is used to trigger your Cloud Function, and is passed into your code in the snapshot, change, and context parameters, is not charged.
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