javascript - Angular View not updating after retrieving data from database -


i working on app retrieves data on of change of $routeparams. here's how begins:

function artistctrl($scope, $http, $location, datafactory, $routeparams){ $scope.artistname = $routeparams.artistname  $scope.$watch('artistname', function(newvalue, oldvalue){   $scope.artistinfo = datafactory.getartist(newvalue) })  $scope.artistinfo = {   artist_name: datafactory.artistinfo.artist_name,   artist_genre: datafactory.artistinfo.artist_genre,   artist_imageurl: datafactory.artistinfo.artist_imageurl,   artist_bio: datafactory.artistinfo.artist_bio }; }

the callback $watch here run. datafactory.getartist retrieves newvalue database being done successfully. done this:

datafactory.js

  datafactory.getartist = function(artist){        return datafactory.checkdb(artist).then(function(dbdata){       if(dbdata.data != "no data"){           datafactory.artistinfo = dbdata.data[0]        }        return dbdata.data[0]     })   }  datafactory.artistinfo = "";

datafactory factory created in file.

artistpage.html

<div class="container this">       <div class="row">         <div class="col-sm-6">           <div><h1>{{artistinfo.artist_name}}</h1></div>           <div rate-yo id='stars' rating="myrating" class="col-sm-4"></div>           <div id='reviews'>23 reviews</div>           <div><h2>{{artistinfo.artist_genre}}</h2></div>           <div><p>{{artistinfo.artist_bio}}</p></div>           <div><button type="button" class="btn btn-primary" ng-click="somefunc()">submit review</button></div>         </div>         <div class="col-sm-6 reviews">           <div><img class="artistpageimage" src={{artistinfo.artist_imageurl}}></div>         </div>       </div>  </div>

i don't understand why view isn't being updated. attempting update $scope.artistname assigning returned datafactory.getartist(newvalue) , assigning new data datafactory.artistinfo have read $apply, having hard time figuring out how apply in context. can help?

does getartist return promise or value. if it's promise try below:

$scope.$watch('artistname', function(newvalue, oldvalue){   datafactory.getartist(newvalue).then(function(value) {     $scope.artistinfo = value;   }) })

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