logo
down
shadow

Firebase Realtime Database: Can't send or retrieve data from Firebase Database


Firebase Realtime Database: Can't send or retrieve data from Firebase Database

By : xmbscott
Date : November 27 2020, 05:23 PM
I wish this help you You're using a partial import of the Firebase SDK, you need to import the real time database as well as stated in the documentation , and call the function properly (with parenthesis).
code :
<head>
</head>

<body>

    <script src="https://www.gstatic.com/firebasejs/6.3.3/firebase-app.js"></script>
    <!-- import the real time database SDK -->
    <script src="https://www.gstatic.com/firebasejs/6.3.3/firebase-database.js"></script>

    <script>
        var firebaseConfig = {
            apiKey: "AIzaSyAQqSYXa-TRHGQwx_Cz9mpg2dreT38tq6k",
            authDomain: "miparada-e0e6c.firebaseapp.com",
            databaseURL: "https://miparada-e0e6c.firebaseio.com",
            projectId: "miparada-e0e6c",
            storageBucket: "miparada-e0e6c.appspot.com",
            messagingSenderId: "331834990091",
            appId: "1:331834990091:web:a1a7925f63be5faf"
        };
        firebase.initializeApp(firebaseConfig)

        function writeData() {
            firebase.database().ref("User").set({
                name: document.getElementById("nameField").value,
                age: document.getElementById("ageField").value
            });
        }

    </script>

    <h1>User Database</h1>
    <input type="text" placeholder="name" id="nameField">
    <input type="text" placeholder="age" id="ageField">
    <!-- call the function with parenthesis -->
    <button onclick="writeData()">SUBMIT</button>

</body>


Share : facebook icon twitter icon
Firebase: retrieve data from realtime database as an Int

Firebase: retrieve data from realtime database as an Int


By : Rares09
Date : March 29 2020, 07:55 AM
I hope this helps you . Firebase represents data as JSON strings, and can only be retrieved as such. I ran into a similar issue on a recent project & had to resort to int>string for pushing data to FB, and string>int on the string retrieved from FB.No code submitted for the question, but basically you have to cast the int to a string using constructor syntax as:
let myStr = String(myInt) //push the string up to Firebase
Firebase retrieve data from realtime database

Firebase retrieve data from realtime database


By : Shashi
Date : March 29 2020, 07:55 AM
To fix this issue You will have to perform a query to find the drivers with the given ID:
code :
firebase.database().ref('Driver')
  .orderByChid('driverId')
  .equalTo('1')
  .once('value')
  .then(function(snapshot) {
    snapshot.forEach(function(driverSnapshot) {
      console.log(driverSnapshot.val());
    });
  })
Driver
    id1
        location
             0: 9.086333699999999
             1: 7.459455999999999
firebase.database().ref('Driver')
  .child('id1')
  .once('value')
  .then(function(snapshot) {
    console.log(snapshot.val());
  })
How to retrieve data from realtime database in Firebase?

How to retrieve data from realtime database in Firebase?


By : user2694980
Date : March 29 2020, 07:55 AM
I wish this help you Hi just add this all into a method and call it & replace 'server/saving-data/fireblog/posts' with your server node link and you will get the reponse from that node.
code :
// Get a reference to our posts
final FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference ref = database.getReference("server/saving-data/fireblog/posts");

// Attach a listener to read the data at our posts reference
ref.addValueEventListener(new ValueEventListener() {
  @Override
  public void onDataChange(DataSnapshot dataSnapshot) {
    Post post = dataSnapshot.getValue(PersonalInfo.class);
    System.out.println(post);
  }

  @Override
  public void onCancelled(DatabaseError databaseError) {
    System.out.println("The read failed: " + databaseError.getCode());
  }
});
How to retrieve array data from children node in Firebase Realtime Database Java? (Firebase Recycler Adapter)

How to retrieve array data from children node in Firebase Realtime Database Java? (Firebase Recycler Adapter)


By : user3007212
Date : March 29 2020, 07:55 AM
it helps some times The problem in your code is that your url_photo_collage field is declared in your DolanItemClass class of type String while in your database is an array. To solve this, change the type of your field from String to a List and get it accordingly in your adapter.
How to retrieve SharedPreferences and send that data to firebase realtime database

How to retrieve SharedPreferences and send that data to firebase realtime database


By : user3348813
Date : March 29 2020, 07:55 AM
around this issue You might be encountering this issue because the of the structure of the SharedPreferences file.
Try arranging your info in a new HashMap that has all the info you need in it as key : value and than try sending the new HashMap as the value to FireBase
code :
HashMap hashMap = new HashMap();

SharedPreferences sp = getSharedPreferences("Mypref", 0);
hashMap.put("first_name", sp.getString("first_name", null))
hashMap.put("last_name", sp.getString("last_name",null))
hashMap.put("fathers_name", sp.getString("fathers_name", null))
hashMap.put("date", sp.getString("date", null))
hashMap.put("income", sp.getString("income", null))
(.......)

reference.child("User").child(Objects.requireNonNull(mAuth.getUid())).setValue(hashMap);
Iterator iterator = hashMap.entrySet().iterator() 
if (hashMap.hasNext()) {
    iterator.next() 
    reference.child("User").child(Objects.requireNonNull(mAuth.getUid())).child(iterator.getKey).setValue(iterator.getValue);
}
Related Posts Related Posts :
  • redux how to use state
  • All data in the db is lost when closing a express based node js server
  • How to convert javascript code for Angular
  • XPath select on child nodes
  • Idle event on mouse move - how to stop script permanently on mouse move
  • Why do I get logic is not defined in this code
  • When I enter a number in the input, the first function starts
  • ES6 imports and node_modules hell
  • How to get css selector of clicked-on element?
  • How to auto input MySQL data (input column 1 data to auto input column 2 data with same column) in php?
  • Appending to Datalist Via Javascript
  • Customizing Material-UI Components with Styled-Components
  • Populate elements with class name using Javascript
  • How to execute promises in batches (first resolving 10, then next 10 and so on)
  • Maximo JS automation script: "importPackage" is not defined
  • How to surround selected text inside textarea with <em> on key combination CTRL+i?
  • Your configured registry does not support audit requests ~ On npm audit
  • What's the Angular equivalent of Vue <slot/>?
  • Iconify icon not updating when "data-icon" set with setAttribute()
  • Javascript newbie stuck with XMLHttpRequest return data
  • How to add obj to to state in my example Redux React
  • Loading "grunt-karma.js" tasks...ERROR >> SyntaxError: Unexpected identifier
  • Why do I get log is not defined
  • get the multiple index of the same string
  • How can I iterate over an Array object by using For IN or FOR OF
  • Launch local executable from web browser
  • How to prepare array of json objects to d3 hierarchical tree structure
  • VueJS - event emitted - show HTML before other calculations
  • Export SASS/SCSS variables to Javascript without exporting them to CSS
  • How to attach an event handler only once continuously
  • How to make button open a link in new tab in JavaScript?
  • Find range from the javascript object
  • How can I use my jQuery code as JavaScript?
  • How to show 5 images in a 2 row slider with bxslider
  • How to convert stream into variables in typescript
  • Three.js custom shader error on Chrome GL_INVALID_OPERATION: Active draw buffers with missing fragment shader outputs
  • My JavaScript doesn't work. How can I solve this problem?
  • Why is this async function is running synchronously?
  • Get updated variable from within react hook before return
  • I want to show all image preview but whenever I upload a new one the old one is gone
  • Would I be able to give access to specific electron APIs safely?
  • Why several clicks fire for each instance of a Class?
  • cant grab value from div using attr()
  • Instantiate subclass without constructing
  • Outputing a created object in javascript to a server side JSON file
  • Transition the numeric labels in a bar chart
  • createBottomTabNavigator: hide just one tab from the tabBar
  • iife vs simple statement behavior with document.title
  • showDialogPopup Refresh Page after Click
  • Child component does not set the initial value passed from the parent: ReactJS
  • Nodejs javascript added to button not responding
  • Trying to define a promise.all
  • Python GEE to extract featurecollection timeseries from Landsat imageries
  • How to write negative binary number?
  • Unable to set property of individual object
  • Why Named Function Expression itself cannot assign Name to another Value?
  • How to reset scroll position on single page pagination
  • How to scroll to bottom of page, when a new message is sent - Socket.io
  • How to reconstruct audio blob from a base64 encoded String?
  • How to calculate numbers within an array of objects
  • shadow
    Privacy Policy - Terms - Contact Us © festivalmusicasacra.org