I try to find out the good syntax for adding classes depending on angular values.
I want to activate a class regarding 2 conditions (one on live user changes, and one on loading datas) with a OR operator.

Here is the line :

```
 <a href="" ng-click="addFavorite(myfav.id);favorite=!favorite">
    <i class="fa orange" ng-class="{'fa-star': (favorite || (fav==myfav.id)), 'fa-star-o': !favorite}"></i>
 </a>

```

I tried some different codes like this one : 

```
 ng-class="{'fa-star': favorite, 'fa-star': (fav==myfav.id), 'fa-star-o': !favorite}"

```

without any success.
Can someone help me finding the good syntax ?