jqGrid Subgrid with “local” Data

There are no direct way to define subgrid with local data, but you can relatively easy implement the same behavior using subGridRowExpanded (Subgrid as Grid). What one need to do is just to get from some you internal structures the data for the subgrid by the rowid of the grid. For example if you would have subgrids map as

var myGridData = [
        // main grid data
        {id: "m1", col1: "11", col2: "12"},
        {id: "m2", col1: "21", col2: "22"}
    ],
    mySubgrids = {
        m1: [
            // data for subgrid for the id=m1
            {id: "s1a", c1: "aa", c2: "ab", c3: "ac"},
            {id: "s1b", c1: "ba", c2: "bb", c3: "bc"},
            {id: "s1c", c1: "ca", c2: "cb", c3: "cc"}
        ],
        m2: [
            // data for subgrid for the id=m2
            {id: "s2a", c1: "xx", c2: "xy", c3: "xz"}
        ]
    };

Inside of subGridRowExpanded you can create subgrid with the following code:

$("#grid").jqGrid({
    datatype: 'local',
    data: myGridData,
    colNames: ['Column 1', 'Column 2'],
    colModel: [
        { name: 'col1', width: 200 },
        { name: 'col2', width: 200 }
    ],
    ...
    subGrid: true,
    subGridRowExpanded: function (subgridDivId, rowId) {
        var subgridTableId = subgridDivId + "_t";
        $("#" + subgridDivId).html("<table id='" + subgridTableId + "'></table>");
        $("#" + subgridTableId).jqGrid({
            datatype: 'local',
            data: mySubgrids[rowId],
            colNames: ['Col 1', 'Col 2', 'Col 3'],
            colModel: [
                { name: 'c1', width: 100 },
                { name: 'c2', width: 100 },
                { name: 'c3', width: 100 }
            ],
            ...
        });
    }
});

The demo shows the results live: