Retrieving Data from Firebase child object in React Native

Question

I'm trying to get data from firebase within react Native Application.

Attached below is my database: enter image description here

QWA17SaADRdgluvVnYrXJK1AvI22
-L-uNMmDRnKTkk55KbMz
allowGPS: true  
notificationSound:  true  
phone:  "345345345345345" 
pushNotification:  true 
shareData:  true  
showAlerts:  true

Below is the code that I've tried and they are not working. Can someone please guide me how can I get the nested values.

firebase.database().ref(`/users/${currentUser.uid}`)
.once('value').then((snapshot) => {
const username = (snapshot.val() && snapshot.val().username) || 'Anonymous';
console.log(snapshot.val().username);
console.log(snapshot.val());
console.log(snapshot.val('username'));
console.log(snapshot.child('phone').val());

Ryan Turnbull · Accepted Answer · 2017-12-11 20:46:05Z

2

You have a further nest inside if your firebase structure

QWA17SaADRdgluvVnYrXJK1AvI22
    -L-uNMmDRnKTkk55KbMz //HERE

So using snapshot.val() wont access your child components. You should only be creating one of these codes when you make a user, and assigning the key (QWA17Sa...) as its user_id. This other code is uneccessary.

To do this, use .set method when creating users to your firebase, similar to below. This should avoid the creation of this seperate unwanted node in your firebase structure.

    const userPath = `/users/${currentUser}`;

    // Save the text and a url to the saved audio file to firebase.
    firebase.database().ref(userPath).set({
      username: foo
      stuff: foo
    });

answered Dec 11, 2017 at 20:46

Ryan Turnbull

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1 Comment

nodechef Over a year ago

Thank you so much. I got to know about this later. Thank you much really helped.

Sasha Tsvigun · Accepted Answer · 2017-12-13 12:41:24Z

0

Can try this code. For me it works

firebase.database().ref('/users/' + firebase.auth().currentUser.uid).once('value').then(function(snapshot) {
    var json = snapshot.val();
  });

answered Dec 13, 2017 at 12:41

Sasha Tsvigun

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1 Comment

nodechef Over a year ago

Yeah but it stores the value of an child object. I wanted to get the values of elements inside. Since I was pushing objects in the firebase rather then using .set function, a new child id is created every time. And we will need to loop through the parent to get all elements using the key of child object.

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