Thinkphp 两级联动

<！-- 前端代码部分-->
<div class="pop-movegroup" id="salesmanBox">
    <dl>
        <dt>选择推广账号:</dt>
        <dd>

            <!-- 一级联动的数据先查询遍历出来-->
            <select name="salesman" id="salesman">
                <volist name="salesman" id="vo">
                    <option value="{$vo.id}">{$vo.uname}</option>
                </volist>
            </select>

        <!-- 二级联动-->
        <select name="lib" id="libs">

        </select>
        </dd>
        <dd class="center">
            <input type="hidden" id='uid' value="{$_GET['uid']|intval}">
            <input type="button" class="btn_b mr10" value="确认" onclick="admin.domoveSalesUser()">
            <input type="button" class="btn_w" value="取消" onclick="ui.box.close()">
        </dd>
    </dl>
</div>

js部分:

 <script type="text/javascript">
//点击一级联动里面的选项 获取id 然后去查询对应的数据
        $("#salesman").change(function(){
//获取id
            var catid=$("#salesman").val();
//将id提交到后台
            $.post("{:U('admin/User/doAddSalesUsers')}","id="+catid,function(data){
//清空二级联动
                $("#libs").empty();
                //console.log(data);

                var count = data.data.length;
                var i = 0;
                var b="";
//根据后端所返回的数据 去展示对应的数据
                for(i=0;i<count;i++){
                    b+="<option   value='"+data.data[i].uid+"'>"+data.data[i].uname+"</option>";
                }
                $("#libs").append(b);
            });
        });

//点击二级菜单里面的数据
        admin.domoveSalesUser = function(){
//获取id
            var id = $('#libs').val();

            if(!id){
                ui.error( '没有选中推广账户' );return false;
            }
//开始进行绑定
            var uid = $('#uid').val();
            $.post(U('admin/User/doAddSalesUser'),{uid:uid,sid:id},function(msg){
                ajaxReload(msg);
                //location.href = U('admin/User/index');
            },'json');
        };
 </script>

后端代码部分:

public function doAddSalesUsers()
    {
        $id = $_POST['id'];
        $data = model("SalesmanEntity")->where("sid = " . $id)->select();
        $this->ajaxReturn($data, "JSON");
    }

    public function doAddSalesUser()
    {
        $return = array('status' => '0', 'data' => '绑定推广账号失败');
        $uid = !empty($_POST['uid'])? intval($_POST['uid']) : 0; //yonghuid
       // var_dump($uid);
        $sid = !empty($_POST['sid'])? intval($_POST['sid']) : 0; //suoshuzuid
        //var_dump($sid);
       // var_dump($dataArray);
        if(empty($uid) || empty($sid)){
            $return['data'] = "数据无效！";
            exit(json_encode($return));
        }

        //去salesman_entity表中去查询该女性id所属用户组
        $dataArray = M('salesman_entity')->where("uid=". $_POST['sid'])->field("sid")->select();
        //var_dump($dataArray);
        $idss = array_column($dataArray,'sid');
        //invite_id
        $yqId = $idss[0];
        //女性用户id

        $user = model('User')->where('uid='.$uid)->find();
        if($user['invite_id']>0){
            $this->error("该用户已被绑定！");
        }
        $datas = array('invite_id'=>$yqId,'sid'=>$sid);
        //开始绑定
        if(model('User')->where('uid='.$uid)->setField('invite_id',$yqId) && model('User')->where('uid='.$uid)->setField('sid',$sid)){
            $return = array('status' => 1, 'data' => '用户绑定成功');
        }
        exit(json_encode($return));
    }