CODEWITHSUNDEEP
javascriptfirebasefirebase-realtime-database
J.Ko
J.Ko

Reputation: 8701

Firebase realtime database: how to get the value of a parent node

Let's say I have database nodes structured like below: Each user sets username of his/her preference, and his/her UID assigned by Firebase auth is logged under the username.

"uid_match":
 {
   "username_1" : {
      "uid" : "firebase_uid_1"
    },
   "username_2" : {
      "uid" : "firebase_uid_1"
  }

I'm trying to write codes to extract the username by the firebase uid. It will look for a certain firebase uid and return the username, which has its own URL.

Below is the part of the code I wrote, but it returns '/uid_match', instead of '/username_1' or '/username_2'.

 let ref=firebase.database.ref('/uid_match');
 let user=firebase.auth().currentUser;
 ref.orderByChild('uid').equalTo(user.uid).once('value', function(snapshot) {
     window.location.href='/'+snapshot.key;
 })

Question: What will be the correct query code to extract "username_1" or "username_2", instead of "uid_match"? Thanks a lot in advance.

Upvotes: 2

Views: 155

Answers (1)

Peter Haddad
Peter Haddad

Reputation: 80914

You need to iterate inside the snapshot, to retrieve the keys username_1 and _username_2:

 let ref=firebase.database.ref('/uid_match');
 let user=firebase.auth().currentUser;
 ref.orderByChild('uid').equalTo(user.uid).once('value', function(snapshot) {
     snapshot.forEach(function(childSnapshot){
     window.location.href='/'+childSnapshot.key;
   });
 });

Upvotes: 1

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