<img ng-src="<%= image_path("no_avatar.png") %>" class="img-circle" ng-class="avatarClass"
     ng-if="!userAvatar || !userAvatar.attachment_url">
<img ng-src="{{userAvatar.attachment_url}}" class="img-circle" ng-class="avatarClass"
     ng-if="userAvatar.attachment_url">