CRM 365 9.0 filtering subgrids (Turbo Forms)

For some reason, filtering subgrids (Turbo Forms / non-legacy JS engine) in CRM 9.0 is not implemented (yet?!).

A temporary solution for on-premise version would be implementing the addCustomFilter function from the C:\Program Files\Dynamics 365\CRMWeb\_static\form\formcontrols.js library.

Current implementation:

addCustomFilter: function(fetchXmlFilter) {
    throw Error.notImplemented('The method or operation is not implemented.');
},

Fix:

addCustomFilter: function(fetchXmlFilter) {
    // throw Error.notImplemented('The method or operation is not implemented.');
    this.$0_3.get_turboGridControl().addCustomFilter(fetchXmlFilter);
},

For online version, calling

this.$0_3.get_turboGridControl().addCustomFilter(fetchXmlFilter);

in your own function should do the magic trick as well.

Note: fetchXmlFilter must be the whole <fetch> node, instead of the <filter> node only. Also, once applying the addCustomFilter on a subgrid, the refresh() function of the grid control must be also called after:

function FilterGrid(gridName, fetchXml)
{
	var grid = Xrm.Page.getControl(gridName);
	
	if(grid)
	{	
		grid.addCustomFilter(fetchXml);
		grid.refresh();
	}	
}