CODEWITHSUNDEEP
javascriptfirebasenested
makeser
makeser

Reputation: 59

How can I get auto ids for get nested data in firebase using javascript?

I have nested firebase data and in this data I have auto generated ids but I need to take child node's data of this auto generated ids and I have to use these ids in my query. I need to take ordersTerminal/kullanicilarTerminal/userIds(auto generated)/orderIds(auto generated)/isim/username I need to follow that path actually but I can't figure out. How can I make? Here my firebase database:

my database

And here my javascript code:

function userConfig() { 

    var dataRef = firebase.database().ref('ordersTerminal').child("kullanicilarTerminal");



    dataRef.on('value', function(snapshot) {
        snapshot.forEach(function(childSnapshot) {
        var childData = childSnapshot.val();
        console.log(childData);

        });
    });



}

Upvotes: 0

Views: 183

Answers (1)

Peter Haddad
Peter Haddad

Reputation: 80924

To get the userId of the currently logged in user, you can do the following:

let user = firebase.auth().currentUser; 
let uid = user.uid;

To get the autogenerated id, you can do the following:

    dataRef.on('value', function(snapshot) {
        snapshot.forEach(function(childSnapshot) {
        var childData = childSnapshot.val();
        var key = childSnapshot.key;
        console.log(childData);
        });
    });

Your reference is at node kullanicilarTerminal, if you use the property key inside the forEach, you will get the following id 93ybLDezrCW2pJsDkZbH6IJfq03

If 93ybLDezrCW2pJsDkZbH6IJfq03 is the id of the currently logged in user, then you can do the following:

    dataRef.child(uid).on('value', function(snapshot) {
        snapshot.forEach(function(childSnapshot) {
        var childData = childSnapshot.val();
        var key = childSnapshot.key;
        console.log(childData);
        });
    });

Now childSnapshot.key will return 01032020-05032020-2

If you dont have both ids, then you can get the data by doing the following:

    dataRef.on('value', function(snapshot) {
        snapshot.forEach(function(childSnapshot) {
         childSnapshot.forEach(function(orderSnapshot) { 
             console.log(orderSnapshot.key); //01032020-05032020-2
             console.log(orderSnapshot.val()); 
            }) 
          })
        });
    });

Your reference is at node kullanicilarTerminal, if you use the property key inside the first forEach, you will get the following id 93ybLDezrCW2pJsDkZbH6IJfq03, then you do another for loop and retrieve the second id 01032020-05032020-2 and the details using val().

Upvotes: 1

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