angularjs - When resolve returning $firebaseArray needs return of $firebaseObject service first? -

i discovered david east's firebase blog post , have started move $loaded usage controllers resolves each view. 1 issue has come involves situation i'm retrieving $firebasearray firebaseref contains firebase database call. ref second part this:

var chatref = firebase.database().ref('messages/'+thisgroup.groupid+'/main'); 

is situation can unwrap 1 promise through resolve, or close doing (activegroup service returns $firebaseobject of user's selected group):

.state('tab.chats-main', {       url: '/chats/main',       cache: true,       views: {         'tab-chats': {           templateurl: 'templates/tab-chatstopic.html',           controller: 'chatstopicctrl'         }       },     resolve: {       currentauth: authrequire,       posts: function($firebasearray, currentauth, activegroup){         var thisgroup = activegroup(currentauth.uid);           thisgroup.$loaded().then(function(){           var chatref = firebase.database().ref('messages/'+thisgroup.groupid+'/main');           return $firebasearray(chatref.limittolast(100)).$loaded();         })           }     } }) 

and here injecting posts in controller:

    .controller('chatstopicctrl', function($scope, thisgroup, posts, profile, chatname, chatmessages, currentauth, activegroup, $cordovacamera, $ionicscrolldelegate, $ionicmodal, $ionicactionsheet, $timeout,$state, moment) {  console.log("what posts? ",posts); // posts undefined 

thanks in advance!

so found works i'm not sure if it's best practice. doing each firebase call separately (and in proper order), seems trick:

.state('tab.chats-main', {   url: '/chats/main',   cache: true,   views: {     'tab-chats': {       templateurl: 'templates/tab-chatstopic.html',       controller: 'chatstopicctrl'     }   },   resolve: {     currentauth: authrequire,     thisgroup: function(activegroup, currentauth){       return activegroup(currentauth.uid).$loaded();     },     posts: function($firebasearray, thisgroup){            var chatref = firebase.database().ref('messages/'+thisgroup.groupid+'/main');       return $firebasearray(chatref.limittolast(100)).$loaded();         }        } }) 

and controller inject it:

    .controller('chatstopicctrl', function($scope, thisgroup, posts, profile, chatname, chatmessages, currentauth, activegroup, $cordovacamera, $ionicscrolldelegate, $ionicmodal, $ionicactionsheet, $timeout,$state, moment) {  console.log("what posts? ",posts); // gives proper result 

if there better/more recommended way of doing this, i'd still appreciate hearing it.