How to loop through child records in firebase?

Question

I'm trying to figure out how to loop through sent_request child which is inside users table and get all user_keys. I tried many ways but it's not working.

table structure:

here is my code:

getProfileData(emailID)
{
    var ref = firebase.database().ref('users');
    ref.orderByChild("email").equalTo(emailID).once("value", (items : any) => {
        let sent_request : any = [];

        items.forEach((item) => {

            sent_request = item.val().sent_request;

        });
        console.log(sent_request);
    });
}

console.log(sent_request) output:

How to get user_key from these records? because I want to pass these each user_key to another method and get records based on that user_key. Please help. Thanks in advance.

The code looks fine on first glance. What isn't working about it? Does it ever get to your callback? Are there any relevant errors on the console? — Frank van Puffelen, Apr 26 '18 at 13:30
@FrankvanPuffelen There are no errors. my question is how to get each user_key which are inside sent_request child inside users table? — Shreyas Pednekar, Apr 27 '18 at 05:37

score 0 · Answer 1 · answered Apr 27 '18 at 13:14

I think you may be looking for this:

ref.orderByChild("email").equalTo(emailID).once("value", (usersSnapshot : any) => {
    let sent_request : any = [];

    usersSnapshot.forEach((userSnapshot) => {

        userSnapshot.child("send_request").forEach((requestSnapshot) => {
            sent_request.push(requestSnapshot.key);
            // OR: sent_request.push(requestSnapshot.child("user"key").val());

        }

    });
    console.log(sent_request);
});

How to loop through child records in firebase?

1 Answers1