Select2 not showing results, but successfully returning JSON -

i'm using select2 jquery plugin mvc4. have javascript file working fetching data in json in controller, i'm getting error when debug , try display results:

unable property 'touppercase' of undefined or null reference 

i think might have json i'm returning since looks objects or fact they're ints, i'm not entirely sure. converting them strings via tostring() didn't work either. [{"name":1,"label":1,},{"name":2,"label":2},...]

here's js:

$("#itemid").select2({     ...     ajax: {     url: $("#itemid").attr("data-getids"),     datatype: "json",     data: function (param) {         return {query: param};},     results: function(data) {         return {results: data};}     } }); 

i figured out. i'm using older version of select2 (3.4.5) , ended mapping json in results function.

results: function (data) {     return {         results: $.map(data, function (item) {             return {text: item.name,             id: item.id};         };     }), }