Access property dinamically about angularfire HOT 12 CLOSED

Looks like I misunderstood your question, lifeisfoo. Also, the example I posted above won't work (and is now deleted). It would be nice to be able to treat an angularFireCollection like a dictionary, but under the hood it's really an Array.

In your example, invite will contain "mydata," so you could do something like this:

<li ng-repeat="invite in invites">
    <a href="#" ng-click="enterChat(invite.$id)">{{ invite.$id }}</a>
    <p>{{ invite.content }}</p>
</li>

This is assuming a data structure like:

invites: {
  username1: {
    content: "cookies"
  }
}

From a controller, though, I'm not sure. Has anyone else encountered this? It looks to me like there's no public method to access an angularFireCollection element by key.

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I'm referring to something like this:

invite[invite.$id]

since the resource key is dynamic (not a fixed "username" string):

invites: {
  "lifeisfoo": "data"
  "bennlich": "otherData"
 //...
}

I've tried using this information http://stackoverflow.com/questions/2559159/how-to-dynamic-call-property-on-javascript-object-with-jquery but seems to not work.

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@lifeisfoo, how do you determine the key that you need to access? If it's in a variable, you should simply be able to do:

var keyname = "username";
for (var index in $scope.invites) {
  var invite = $scope.invites[index];
  var data = invite[keyname]; // "mydata" is now in the data variable
}

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@anantn, I think he means that $scope.invites is a dictionary, so he wants to access a specific invite by key, as opposed to accessing it via iteration, or via whatever index angularFire has assigned it.

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Ah, in that case, I'd recommend using the angularFire function instead:

var promise = angularFire(fbInvites, $scope, 'invites', {});
promise.then(function() {
    $scope.invites[keyname];
});

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Oh, interesting. It's probably worth noting in the docs that an angularFireCollection is not key-addressable, while an angularFire is.

The difference between the two data structures seems kind of arbitrary to me right now. Are there reasons not to have an explicitly-synced dictionary? Or should I make that a feature request (and maybe begin working on it)?

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Currently I use this hack to get the data associated at the key. Note that, in this case, my "invites" collection contains a maximum of one invite.

var roomIDhack = ""; 
angular.forEach($scope.invites, function(value, key){
    for (var i = 0; value[i] != null; i++) {
       roomIDhack+=value[i];
    }
});

@anantn I tried with your first example (using angularFireCollection), but isn't working:

for (var index in $scope.invites) {
  var invite = $scope.invites[index];
  var data = invite[invite.$id]; // the key is the $id
}

@bennlich Yes, invites is a a dictionary (see my previous post for an example).

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It won't work with angularFireCollection, you need to use angularFire if you want to reference objects that way.

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@anantn I am also struggling with this. I can read data using the angularFire notes above, but my writes are not being committed. I am relatively new to AngularJS and very new to firebase. The following code is meant to write a user at userId = "user1".

    var url = "https://mbgl.firebaseio.com/users";
    console.log("url: " + url);
    var promise = angularFire(url, $scope, 'users', {});
    promise.then(function (users) {
        $scope.users["user1"] = {first: "Mr.", last: "BoJangles"};
        console.log($scope.users["user1"]);
    });

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I had a breakthrough - there is a timing aspect to this. I can observe changes to the firebase object with the code below. My next question is - what is the proper way of handling these timing issues?

    var url = "https://mbgl.firebaseio.com/users/user1";
    console.log("url: " + url);
    var promise = angularFire(url, $scope, 'user', {});
    promise.then(function (users) {
        window.setTimeout(function () {
            safeApply($scope, function () {
                $scope.user = {first: "Mr.", last: "BoJangles"};
            });
        }, 1000)
        window.setTimeout(function () {
            safeApply($scope, function () {
                $scope.user.last = "Goodbar";
            });
        }, 5000)
        window.setTimeout(function () {
            safeApply($scope, function () {
                $scope.user = {first: "Mrs.", last: "Pacman"};
            });
        }, 3000)


    });

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@allumbra Any changes to $scope inside callbacks will need to be wrapped in $timeout. Therefore, if you are trying to add an item inside the promise callback, you can try this:

function MyController($scope, $timeout, angularFire) {
  var url = "https://mbgl.firebaseio.com/users";
  var promise = angularFire(url, $scope, 'user', {});
  promise.then(function() {
    $timeout(function() {
      $scope["user1"] = {first: "Mr.", last: "BoJangles"};
    });
  });
}

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We added getByName and getByNames to angularFireCollection which should make both angularFire and angularFireCollection key-addressable.

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