将多组单选按钮值存储到object angularjs中(不带jQuery)

<tr ng-repeat="s in rollCallList">
    <td align="left">{{s.Last_Name}}, {{s.First_Name}}</td>
    <td>
         <input name="{{s.dc_number}}" id="id1{{s.dc_number}}" type="radio" value="P" ng-checked="radiocheck" />P
                <input name="{{s.dc_number}}" id="id2{{s.dc_number}}" type="radio" value="A" />A
                <input name="{{s.dc_number}}" id="id3{{s.dc_number}}" type="radio" value="X" />X
    </td>
</tr>
<tr>
    <td colspan="2">
           <button class="btn" ng-show="SaveAttBtn" ng-click="SaveAtt(RollCallDate)">Save Attendance</button>
           <button class="btn" ng-show="DeleteAttBtn" ng-click="DeleteAtt(RollCallDate)">Delete Attendance</button>
    </td>
</tr>

$scope.SaveAtt = function (dt) {
        $scope.rollCallList.forEach(function (obj) {

            var dc = obj.dc_number;
            var attVal = $('input[name=' + dc + ']:checked').val();

            obj.status = attVal;
            obj.classDate = dt;

            console.log(obj);
        });
    }