Question

I have a JQGrid that groups together certain rows. I use group to define what rows should grouped together, so for example, if there are three 2s, it groups all 2s together. However it’s possible there could be only one 2, in which case I wouldn’t want it grouped, i.e. having the row under a group.

My question is, is it possible to have the grouping only be applied to certain rows and leave others alone?

Below is what I currently have:

colNames:['group', 'Description', 'File Sent to Customer', 'Date/Time', 'ATS', '# of Bib Records', '# of Items', 'Customer DB', 'Customer ID'],
    colModel:[
        {name:'group', index:'group'},
        {name:'description', index:'description'},
        {name:'fileSent', index:'fileSent', width:150},
        {name:'date', index:'date', width:160},
        {name:'ats', index:'ats', width:100},
        {name:'bibRecords', index:'bibRecords', width:100},
        {name:'items', index:'items', width:100},
        {name:'customerDB', index:'customerDB', width:240},
        {name:'customerID', index:'customerID', width:150}
    ],
    grouping:true,
    groupingView : {
        groupField : ['group'],
        groupColumnShow : [false],
        groupText : [''],
        groupCollapse : true,
        groupOrder: ['desc']
    },

Answer 1

I find your question interesting. So I wrote the solution which shows instead of the standard grouping (see the starting demo)

the following:

The corresponding code is not so complex:

loadComplete: function () {
    var i, groups = $(this).jqGrid("getGridParam", "groupingView").groups,
        l = groups.length,
        idSelectorPrefix = "#" + this.id + "ghead_0_";
    for (i = 0; i < l; i++) {
        if (groups[i].cnt === 1) {
            // hide the grouping row
            $(idSelectorPrefix + i).hide();
        }
    }
}

It uses one level grouping, but it can be changed in the same way to the multilevel grouping.

One warning about the resulting grid: you should be careful with sorting of the grid. The problem is that jqGrid sort the rows inside of the group only. So the above rows with hidden grouping headers seems be out of sorting process.