Can not select row in subgrid : Jqgrid - jquery-ui

Question

I am using jqgrid, and added one subgrid inside it, which looks like as below,
As you can see,
Rows with columns having 11 and 13 are main grid rows
And every row has subgrid having interest,
The Add Record element shows Add Pop up for Subgrid
Here is the code for subgrid looks like,
subGridRowExpanded: function(subgrid_id, row_id) {
var subgrid_table_id, pager_id;
subgrid_table_id = subgrid_id+"_t";
pager_id = "p_"+subgrid_table_id;
$("#"+subgrid_id).html("<table id='"+subgrid_table_id+"' class='scroll'></table><div id='"+pager_id+"' class='scroll'></div>");
jQuery("#"+subgrid_table_id).jqGrid({
url:"shops?q=2&ShopID="+row_id,
datatype: "xml",
colNames: ['Interest'],
colModel: [
//{name:"Id",index:"ShopID",width:80,editable:false,editoptions:{readonly:false,size:40}}, //Shop ID not required
{name:"id",index:"id",editable:true,edittype:"select",editoptions:{dataUrl:'shops?q=3&ShopID='+row_id},editrules:{required:true}}
],
rowNum:10,
pager: pager_id,
width: '100%',
height: '100%',
scrollOffset: 0,
sortname: 'num',
sortorder: "asc",
height: '100%',
editurl:'shops?q=5&ShopID='+row_id
});
jQuery("#"+subgrid_table_id).jqGrid('navGrid',"#"+pager_id,{edit:false,add:true,del:true})
},
subGridRowColapsed: function(subgrid_id, row_id) {
// this function is called before removing the data
//var subgrid_table_id;
//subgrid_table_id = subgrid_id+"_t";
//jQuery("#"+subgrid_table_id).remove();
}
Problem is , when there are more than one element in subgrid, i can select that (I use latest version of Chrome) but when there is only single element in subgrid surprisingly I can select it ( if you notice the color difference please see subgrid element 'Gifts' -selected below row 13 ) and once select that 'Gifts' can be deleted.
UPDATE:
In firefox and IE , only first row gets selected from subgrid
Is there something wrong in the code ? why can't i select single element when there are more than one elements in subgrid ?
Appreciate your time, thanks

Answer 1

I suppose that you have problem with id duplicates. HTML don't allow to use id attributes on the same HTML pages with the same values. The values of all id attributes must be unique. I recommend you to verify that you have the problem by usage of Developer Tools of Chrome/IE or using Firebug. You need just examine the id attributes which you have now on <tr> elements of grid and subgrids.
On the other side all rows (all <tr> elements) of jqGrid become an id attribute assigned. Typically you have to fill id in the server side in the response of url. The problem is that one use typically the values from id from the database, but you have typically unique id only over one table of the database and not over all tables on the database. So you can easy have the scenario where multiple jqGrids (or grid with subrird) get rows with id duplicates.
The most easy way to fix the problem is to use idPrefix option which was introduced in jqGrid after my suggestion. The main advantage is that you can continue to use the original id values which you have in the database and use id attributes in jqGrid which will be unique because of building id attributes from the id values returned from the server, but with the usage of prefixes. In the answer. So I recommend you to use different idPrefixes for all subgrids. For example you can use idPrefix: 's' + row_id + '_' in subgrid (see the answer and this one).