CODEWITHSUNDEEP
javascriptdatabasefirebase
Travis Tubbs
Travis Tubbs

Reputation: 877

I only got database output once, but not again. Why wont this work?

I am working in firebase for a web app. The first time I did the query it worked, then I added the second reference and it broke. Upon doing that, I rolled back to when it previously worked and it no longer worked either. I am getting no errors in the console.

  function displayMessage(){
      var messageId;
      alert("Firebase Initializing UserID: " + Parse.User.current().id);
    var reference = new Firebase("https://gibber.firebaseio.com/Recent");
    reference.orderByChild("userId").equalTo(Parse.User.current().id).on("child_added", function(snapshot) {
        alert(snapshot.key());
        messageId = snapshot.key();
        });
    var reference2 = new Firebase("https://gibber.firebaseio.com/Recent");
    reference2.child(messageId+"/lastMessage").on("value", function(snapshot) {
      alert(snapshot.val());///snapshot should be last message
    });
  };

enter image description here

Upvotes: 0

Views: 38

Answers (1)

Frank van Puffelen
Frank van Puffelen

Reputation: 599956

The nesting of you code is off, which is hard to spot because the indentation is messy.

This works:

var userId = 'sKdkC6sGYb';
var ref = new Firebase("https://gibber.firebaseio.com/Recent");
ref.orderByChild("userId").equalTo(userId).on("child_added", function(snapshot) {
    console.log('child_added: '+snapshot.key());
    var messageId = snapshot.key();
    ref.child(messageId+"/lastMessage").on("value", function(othersnapshot) {
        console.log('value: '+othersnapshot.val());///snapshot should be last message
    });
});

I'm not sure why you're taking this two-queried approach though, the lastMessage property is available in the outer snapshot already:

var userId = 'sKdkC6sGYb';
var ref = new Firebase("https://gibber.firebaseio.com/Recent");
ref.orderByChild("userId").equalTo(userId).on("child_added", function(snapshot) {
    console.log('child_added: '+snapshot.key());
    console.log('value: '+snapshot.val().lastMessage);
});

See: http://jsbin.com/bikoni/edit?js,console

Upvotes: 2

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