AngularJS 单选框及多选框的双向动态绑定

<input type="radio" name="person-action" value="go_home" ng-model="person.action" />回家 
<input type="radio" name="person-action" value="go_to_school" ng-model="person.action" />回学校 

<input type="checkbox" ng-true-value="true" ng-false-value="false" ng-model="phone.play_sound" />铃声 
<input type="checkbox" ng-true-value="true" ng-false-value="false" ng-model="phone.play_vibrate" />震动 
<input type="checkbox" ng-true-value="true" ng-false-value="false" ng-model="phone.play_lights" />呼吸灯 

var str = ""; // 原来存放选中的项 
$scope.Selected = false; //默认未选中 
var choseArr=[]; // 定义数组用于存放前端显示 
$scope.check = function(z,x){ 
console.log("HUY:"); 
console.log(z); 
console.log("HUYU:"); 
console.log(x); 
if (x == false) { // 选中 
   str = str + z + ','; 
  } else { 
   str = str.replace(z + ',', ''); // 取消选中 
  } 
  choseArr = (str.substr(0,str.length-1)).split(','); 
 console.log("HY:"); 
 console.log(choseArr); 
 $scope.number_request = choseArr.length; // 前端显示所选数量 
 $scope.content_request = choseArr; // 前端显示所选请求ID 
}; 

<tr ng-repeat="item in querydata"> 
<td ng-bind="$index+1">1</td> 
 <td><a ui-sref="#">{{item.postid}}</a></td> 
  <td>{{item.medname}}</td> 
  <td>{{item.medfact}}</td> 
  <td>{{item.medcnt}}</td>  
  <td>{{item.remark}}</td>   
  <td>{{item.tel}}</td>   
  <td>{{item.post_time}}</td> 
  <td><input id={{item.postid}} type="checkbox" ng-model="Selected" ng-click="check(item.postid,Selected)" /></td>   
</tr>