Codeigniter JQuery在JQuery.get请求后动态加载视图中的数据

我一直在想，但我无法让它发挥作用。所以我有一个Jquery函数，它在onblur事件的输入字段后在数据库中发布新的折扣值。

JQuery:

    function saveAtlProc(t){
    pzid = $('#pzrows').attr('rel');
    atl_proc = $(t).val();
    var site_url = document.getElementById("site_url").value;
     $.post(site_url, {
            pzid : pzid,
            atl_proc : atl_proc,
            site_url : site_url
        },
        function(rawdata){
             getPZtotals();
        });
}

这是可行的，问题从getPZtotals（）开始，

getPZtotals（）JQuery:

function getPZtotals(){
pzid = $('#pzrows').attr('rel');
var site_url = document.getElementById("pvn_rates_get").value;
$.get(site_url, {
        pzid : pzid
    },
    function(rawdata){
     var pieg_nos = rawdata.pieg_nos;
        alert(pieg_nos);
});
}

Alert函数显示变量未定义。我不明白为什么。

这是.get（）中返回的内容，使用firebug 进行检查

[{"ID":"123","avr":"0","avrnr":"1502193","avrdat":"2015-03-15","avrproc":"0.00","pz":"","serija":"","numurs":"","datums":"0000-00-00","parvad":"P'u0101rvad'u0101t'u0101js: klienta transports","apm_not":"","apm":"","piez":"Jauns pied'u0101v'u0101jums","pieg_id":"667","pieg_nos":"Miks Ratnieks SIA","reg_nr":"RE'u0122ISTR'u0100CIJASNR","pvn_id":"PVNSNR","pieg_jadr":"Uliha 68-1","pieg_fadr":"Kurmja pieg'u0101des32-1","pieg_iban":"LV34012389072345987","pieg_swift":"SWED8927348","pieg_banka":"SWEDBANK","valuta":"EUR","summa":"300.00","atl_proc":"2.00","atl_summa":"6.00","summa_bpvn":"294.00","pvn":"63.00","summa_arpvn":"363.00","apm_datums":"0000-00-00","datetime":"2015-03-19 13:04:22","avanss":"","avanss_txt":"","avanss_sum":"0.00","avanss_apm":"0.00","arpvn":"","komentars":"","nol":"","statuss":"Iesakts","autors":"","pvn_summa_0":"0","pvn_summa_1":"0","pvn_summa_2":"0","pvn_likme_0":"0","pvn_likme_1":"21","pvn_likme_2":"12","pvn_0":"0","pvn_1":"0","pvn_2":"0"}]

我认为这是正确的，不应该有任何问题。

MY控制器：返回.get（）函数中的数据

  public function get_new_discounts(){
    $this->load->model('offers_for_clients_model');
    $id = trim($_GET['pzid']);
    $data['orders_info'] =  $this->offers_for_clients_model->get_offers_info($id);
    $this->output->set_output(json_encode($data['orders_info']));
    /*echo ();*/
}

型号：

function get_offers_info($id){
    $query = $this->db->where('ID', $id)->get('pz_pied')->result();
    return $query;
}

我在谷歌上搜索了一下，但找不到类似的东西。