ThinkPHP多表查询

if (I('post.uid')) {
        $map['uid'] = '68';
        $table1 = M('table1');
        if($orderData = $table1->where($map)->select()){
            $data = array();
            $table2 = M('table2');
            foreach ($orderData as $v) {
                $news_map['id'] = $v['tid'];
                if($myClient = $table2->where($news_map)->find()){
                    array_push($data, $myClient);
                }
            }
            $msg['status'] = 1;
            $msg['data'] = $data;
            $this->ajaxReturn($msg);
        }  else {
            $msg['status'] = 0;
            $msg['msg'] = '没有信息！';
            $this->ajaxReturn($msg);
        }
        }

{
  "status": 1,
  "data": [
    {
      "id": "27",
      "name": "小花",
      "sex": "女"
    },
    {
      "id": "28",
      "name": "小草",
      "sex": "女"
    }
  ]
}