controller.js

        $scope.archiveGoal = function(goal) {
            goal.removed_at = new Date();
            goal.editable = false;
            Goal.update({goal: goal, id: goal.id});
        };

gistfile1.html

        <ul class="[ list-unstyled ]" ng-if="(goals | filter: {removed_at: '!'}).length > 0">
          <li class="goal" ng-repeat="goal in goals | filter: {removed_at: '!'}">
            {{ goal }}
            <div ng-include="'/views/goals/show.html'"></div>
          </li>
        </ul>

show.html

      <div class="form-group no-margin-bottom" ng-if="goal.id && !goal.removed_at">
        <input type="submit" value="Save" class="btn btn--save"> &nbsp; <button class="btn btn--archive" ng-click="archiveGoal($parent.goal)">Archive</button> &nbsp; <a href="#" class="btn btn--cancel" ng-click="goal.editable = false">Cancel</a>
      </div>