Prepopulate Data in the fields using REST service in Hosted App

function readSponsor(sponsorItemID) {
  
    HostUrl = decodeURIComponent(getQueryStringParameter("SPHostUrl"));
    AppWebUrl = decodeURIComponent(getQueryStringParameter("SPAppWebUrl"));
    try{
        var executor = new SP.RequestExecutor(AppWebUrl);
        var qualifiedUrl = AppWebUrl + "/_api/SP.AppContextSite(@target)/web/lists/getbytitle('" + sponsorListName + "')/items?$filter=SponsorCode eq '" + sponsorItemID + "'&@target='" + HostUrl + "'";
        executor.executeAsync(
           {
               url: qualifiedUrl,
               method: "GET",

               headers: {
                   "accept": "application/json;odata=verbose",
                   "content-type": "application/json;odata=verbose",
                   "X-RequestDigest": $("#__REQUESTDIGEST").val()
               },
               success: function (data) {
                   var jsonObject = JSON.parse(data.body);
                   var sponsorData = jsonObject.d.results;
                 
                 
                   if (sponsorData.length == "1")
                       {
                   //   for (var i = 0; i < sponsorData.length; i++) {
                   var activePara = sponsorData[0].IsActive;
                   $('#sponsorCode').val(sponsorData[0].SponsorCode);
                   $('#sponsorName').val(sponsorData[0].SponsorName);
                   $('#sponsorAddress').val(sponsorData[0].SponsorAddress);
                   $('#sponsorActive').attr('checked', activePara);
                   $('#checkboxID').iCheck({ checkboxClass: 'icheckbox_flat-green', radioClass: 'iradio_flat-green' });
                   $('#primarySponsorContactName').val(sponsorData[0].PrimarySponsorContactName);
                   $('#primarySponsorContactNumber').val(sponsorData[0].PrimarySponsorContactNumber);
                   $('#primarySponsorEmail').val(sponsorData[0].PrimarySponsorEmail);
                   $('#secondarySponsorContactName').val(sponsorData[0].SecondarySponsorContactName);
                   $('#secondarySponsorContactNumber').val(sponsorData[0].SecondarySponsorContactNumber);
                   $('#secondarySponsorEmail').val(sponsorData[0].SecondarySponsorEmail);
                   var noneditableChoice = true;
                   if (sponsorItemID) {
                       ActiveAndInActive(noneditableChoice);
                   }
                   }
               },
               error: errorHandlerRead
           }
       );
    }
    catch (errorMsg) {
        console.log(errorMsg.message);
    }
    function errorHandlerRead(err)
    {
        console.log(err.data);
      
    }
}