The dummy column created when grouping adds a redundant watch

[nikospara]

This is an enhancement request.

When grouping (showGroupPanel: true), a dummy column is inserted at the start of each grid row. This is always empty and acts as a placeholder under the group expansion triangle. This column, inserted in rowFactory.getGrouping, uses the standard cell template defined here.

The empty field of the grouping column is substituted in ng-cell.js:

var cellTemplate = $scope.col.cellTemplate.replace(COL_FIELD, 'row.entity.' + $scope.col.field);

This will place a watch for the expression row.entity. (note the final dot, related to this bug). This watch is redundant since there will never be any data in this cell.

Proposed solution

Modify rowFactory.js, presently line 231, to define a simple template for the grouping column, e.g.:

// Line 231:
cellTemplate: "<div class=\"ngCellText\" ng-class=\"col.colIndex()\"></div>"