angular中input的value与ng-modal的关系

是这样的，我才开始学习angular，但是没弄明白angular中input的value与ng-modal的关系
当我的input标签的value不是数据中的值时他就不会被选中。
这是html：<div class="form-group">
<label for="" class="col-sm-2 control-label">类型</label>
<div class="col-sm-10 ">
<label class="radio-inline">
  <input type="radio" ng-model="v.type" value="click"> 关键词
</label>
<label class="radio-inline">
  <input type="radio" ng-model="v.type" value="view"> 链接
</label>
</div>
</div>这是angular：$scope.data =  {
     "button":[
     {
          "type":"click",
          "name":"今日歌曲",
          "key":"V1001_TODAY_MUSIC"
     },
     {
           "type":"view",
           "name":"菜单",
           "url":"http://www.soso.com/",
           "sub_button":[
           {
               "type":"view",
               "name":"搜索",
               "url":"http://www.soso.com/"
            },
            {
               "type":"view",
               "name":"视频",
               "url":"http://v.qq.com/"
            },
            {
               "type":"click",
               "name":"赞一下我们",
               "key":"V1001_GOOD"
        }
    ]    
 }       
 ]
}