jQuery Grid Plugin - jqGrid

Ok, I dont really know how to call this topic, but here is my problem.

I have a grid made with some data, the grid is created authomaticly using: https://github.com/sirshurf/iphp

Attached example:

   $("#users").jqGrid({"url":"/user/roles","datatype":"json","mtype":"POST","viewrecords":true,
                   "colModel":[
                                  {"editable":true,"editrules":{"required":true},"name":"role","label":"Role","_objGrid":{},"search":true},
                                  {"editable":true,"editrules":{"required":true},"name":"title","label":"Title","_objGrid":{},"search":true},
                                  {"name":"id_parent","index":"parent_name","label":"Id Parent","stype":"select","search":true,"searchoptions":{"value":":Select;0:1;1:2"},"editable":true,"edittype":"select","editoptions":{"value":":Select;0:1;1:2"},"editrules":{"required":true},"formoptions":[],"_objGrid":{}},
                                  {"editable":true,"edittype":"text","editoptions":{"defaultValue":"99"},"editrules":{"required":true,"number":true},"name":"order","label":"Order","_objGrid":{},"search":true}
                   ],"autowidth":true,"height":"480px","rowNum":20,"rowList":[20,40,60,80,100],"caption":"Users","postData":{"grid":"users"},"editurl":"/user/roles","ondblClickRow":function(rowId, iRow, iCol, e){ if(rowId){  $(this).jqGrid('editGridRow',rowId, {"checkOnSubmit":true,"reloadAfterSubmit":true,"closeAfterAdd":true,"closeAfterEdit":true,"jqModal":false,"closeOnEscape":true,"afterSubmit":function (data, postdata) { try { json = $.parseJSON(data.responseText); if (json.code == "ok"){ return [true,"",""]; } else { if (json.code == "error"){ return [false,json.msg,""]; } else { return [false,"Error Occured",""]; } } } catch (e) { result = data.responseText.split(":"); if ( result[0] != "OK") { if (result[1] != "") { return [false,result[1],""]; } else { return [false,result[0],""]; } } else { return [true,"",""]; } } }}); } },"pager":"users_pager"});
$("#users").navGrid("#users_pager",{"edit":true,"add":true,"del":true}, {"checkOnSubmit":true,"reloadAfterSubmit":true,"closeAfterAdd":true,"closeAfterEdit":true,"jqModal":false,"closeOnEscape":true,"afterSubmit":function (data, postdata) { try { json = $.parseJSON(data.responseText); if (json.code == "ok"){ return [true,"",""]; } else { if (json.code == "error"){ return [false,json.msg,""]; } else { return [false,"Error Occured",""]; } } } catch (e) { result = data.responseText.split(":"); if ( result[0] != "OK") { if (result[1] != "") { return [false,result[1],""]; } else { return [false,result[0],""]; } } else { return [true,"",""]; } } }}, {"checkOnSubmit":true,"reloadAfterSubmit":true,"closeAfterAdd":true,"closeAfterEdit":true,"jqModal":false,"closeOnEscape":true,"afterSubmit":function (data, postdata) { try { json = $.parseJSON(data.responseText); if (json.code == "ok"){ return [true,"",""]; } else { if (json.code == "error"){ return [false,json.msg,""]; } else { return [false,"Error Occured",""]; } } } catch (e) { result = data.responseText.split(":"); if ( result[0] != "OK") { if (result[1] != "") { return [false,result[1],""]; } else { return [false,result[0],""]; } } else { return [true,"",""]; } } }}, {"checkOnSubmit":true,"reloadAfterSubmit":true,"closeAfterAdd":true,"closeAfterEdit":true,"jqModal":false,"closeOnEscape":true,"afterSubmit":function (data, postdata) { try { json = $.parseJSON(data.responseText); if (json.code == "ok"){ return [true,"",""]; } else { if (json.code == "error"){ return [false,json.msg,""]; } else { return [false,"Error Occured",""]; } } } catch (e) { result = data.responseText.split(":"); if ( result[0] != "OK") { if (result[1] != "") { return [false,result[1],""]; } else { return [false,result[0],""]; } } else { return [true,"",""]; } } }}, {});
$("#users").filterToolbar({"stringResult":true});

One of the columns (Id Parent)  is populated from a SQL join and is named as the display column (parent_name) but the index (the submited value) on search and edit is diferent (id_parent).

This works great in Search and Add but… The edit has a problem. The ID of the edit value list (it looks like) needs to be the display value of the column and in my case it's the name value and not the index value.

Any help will be appriciated.