Applying filtering over aggregate field in UI-grid angular JS

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AngularJs

Hi,

I'm using ui-grid for displaying data from DB in Angular JS.I've used Aggregation in one of the field and want to applying filter (in grid only)over the aggregate value instead of cell value.But the filter applies to cell value only.Below is the code of the column in ColumnDef where i'm trying the same :-

{
                        displayName: 'Earning',
                        name: 'Earning',
                        field: 'Earning',
                        width: 150,
                        type: 'number',
                        enableCellEdit: true,
                        enableCellEditOnFocus: true,
                        visible: true,
                        treeAggregationType: uiGridGroupingConstants.aggregation.SUM,
                        customTreeAggregationFinalizerFn: function (aggregation) {
                            aggregation.rendered = aggregation.value;
                        },

                        filter: {
                            condition: function (searchTerm, cellValue) {
                                return DataService.extractData(searchTerm, cellValue);
                            }
                        }
                    },

What I have tried:

Passing

aggregation.value

instead of cellValue.