[Firebase + Angular] firebase data in factory not refreshing on login

On Tuesday, January 6, 2015 1:05:39 PM UTC-5, cbenerofe wrote:



i hope this question makes sense...
considering data in firebase under the path "firebase_url/posts" and a
rule ".read": "auth != null"
where my goal is to have no data show up pre-authentication, and then
have the data to show up after login

all works well if i attach $scope.posts to the data using $firebase and
$asArray in a controller

however, if i move the $firebase ref and $asArray into a factory, and
access the factory from my controller,
then the data does not populate on login, i have to manually refresh the
browser after logging in to get the data to show up.

thanks for any help,

here is the issue reproduced on fiddle
http://jsfiddle.net/cbenerofe/0kzwsyno/
you can login with email = te...@example.com <javascript:> password =
test

in the PostsCtrl controller there are two ways to set the $scope.posts
variable
when set with the $firebase in the controller, the data shows up after
logging in.
when set using the Post factory, then the fiddle needs to be re-run after
logging in to have the data show up

thanks for any help, i am looking forward to insight into what is going
on.
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On Monday, January 12, 2015 at 1:10:54 PM UTC-5, Michael Kato Wulf wrote:

Hello Craig,

I don't see how this could be related to a controller vs a service--it
functions the same in both cases. More likely, you changed the timing of
the events when you refactored this code.

If the data cannot be accessed until after the user is authenticated,
then you'll need to wait until they authenticate to synchronize your array.
Otherwise it's going to cause an error and no data will be synced.

One simple wait to do this is to use $firebaseAuth::$waitForAuth, which
returns a promise that will resolve when the user is authenticated.

A better approach would be to use resolve
<https://www.firebase.com/docs/web/libraries/angular/guide.html#section-routes>,
which is described in the AF guide
<https://www.firebase.com/docs/web/libraries/angular/guide.html>--I
highly recommend you save yourself a ton of questions and thrashing and
digest that guide first. The resolve approach, specifically, is a great
abstraction as this avoids a bunch of if( authenticated ) then { ... } else
{ ... } logic.

Cheers,
Kato

--

Kato,
thanks for the response. i somehow thought the data would be
automatically re-synced upon authorization.
i updated my factories as below, and now it's working like i had hoped.
http://jsfiddle.net/cbenerofe/Lkbj7q1d/

app.factory('Post',['$firebase', 'FIREBASE_URL', 'Auth',
function ($firebase, FIREBASE_URL, Auth) {
var sync;
var posts;
Auth.$onAuth( function(authData) {
if (authData) {
sync = $firebase(new Firebase(FIREBASE_URL + '/posts'));
posts = sync.$asArray();
}
});
var Post = {
all: function() {
return posts;
},
};
return Post;
}]);

app.factory('Auth', ['$firebase', '$firebaseAuth', 'FIREBASE_URL' ,
function($firebase, $firebaseAuth, FIREBASE_URL) {
var ref = new Firebase(FIREBASE_URL);
return $firebaseAuth(ref);
}
]);
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