Sortable relation column

[viezel]

Lets use your demo app as an example of this feature. We want to add the number of Orders to the Customer Resource table. We also want this relation column to be sortable.

Today, I can use formatUsing or getValueUsing

Columns\Text::make('orders')
    ->formatUsing(fn ($record) => count($record)),

But none of them are sortable.

I propose to build a Number column, that requires a number and that would be sortable

Columns\Number::make('orders')
    ->formatUsing(fn ($record) => count($record))
    ->sortable()

or add a relationCount

Columns\Text::make('orders')
    ->relationCount('orders')
    ->sortable()

[danharrin]

Hey, I think relatedCount() would do the trick, allowing custom formatted sorting would not be very performant.