jqGrid - Setting select value in edit form - jqgrid

Question

I'm having a hard time trying to set the value of a select box in the edit form. For example I have my colModel set up like this.
colModel:[
{name:'communication_id', key: true, index:'communication_id', width:30},
{name:'communication_type_id', index:'communication_type_id', width:30},
{name:'communication_type_select',index:'communication_type_select',hidden:true,width:150, editable:true,edittype:'select',formatter:'select',editrules: {edithidden:true},
formoptions:{label:'Communication Type'},
editoptions:{dataUrl:"working_data_url",
buildSelect: function(json){
var response = $.parseJSON(json);
var s = '<select>';
$.each(response.results,function(i,com){
s += ('<option value="' + com.communication_type_id + '">'+ com.communication_type_desc + '</option>');
});
return s + "</select>";
},dataInit: function(elem){
alert(temp);
//alert($('#com_table_communication_type_id').val());
//$(elem).val($('#com_table_communication_type_id').val());
}}},
{name:'communication_send_dt', index:'communication_send_dt', width:150, sortable:true, sorttype: 'date',
firstsortorder: 'desc', datefmt:'m/d/Y', editable:true},
editoptions: {recreateForm:true},
rowNum:10,
width:'100%',
rowList:[10,20,30],
pager: '#com_pager',
sortname: 'communication_send_dt',
viewrecords: true,
sortorder: "desc",
loadonce:true,
caption: "Communication",
jsonReader: {
repeatitems : false,
root: "results"
},
height: '100%',
onSelectRow: function(communication_id){
var comtype = $(this).getRowData(communication_id);
var temp = comtype['communication_type_id'];
}
});
grid.jqGrid('navGrid','#com_pager',{edit:true,add:false,del:false});
When I click the edit button it loads the select options correctly, but I am having trouble with which one is selected. I want the value from communication_type_id to load into communication_type_select and I have tried different things to get that too happen. Basically if the id in communication_type_id is 2, then I want the select box in the edit form to be set to 2 as well when the edit form loads. Any help on this?
Update 1: I got it mostly working now by using beforeShowForm, but now I am running into a weird thing. When I have an alert in the beforeShowForm everything works, but when its commented out, it does not work! Thanks for your help #Oleg!
grid.jqGrid('navGrid','#com_pager',{edit:true,add:false,del:false},
{closeOnEscape:true, recreateForm:true,beforeShowForm: function(formid){
//alert("com type id = "+comidvar + " response id = "+comrespvar + " com form type id = "+comfrmtypevar);
$("#communication_type_select", formid).attr("value",comidvar);
$("#form_response_select", formid).attr("value",comrespvar);
$("#form_type_select", formid).attr("value", comfrmtypevar);
}},

Answer 1

If I understand you correct you should use ajaxSelectOptions option of jqGrid with data property. You can define some additional option like communication_type_id in the data which value you can returns by the usage of $("#list").jqGrid('getGridParam', 'selrow') and then getCell to get the value from communication_type_id column. See the answer for details.