Can I use reference selector on two non persistent objects

I have two objects, one Event can have multiple Event Types,  both not persistable.  Can I use reference selector for event type? It seems I cannot do it.
1 answers

You can, however you need a datasource MF to create the selectable objects.

If you use the connector to select the association and  attribute you want to show Mendix gives an error like: Cannot use entity ….here because it is not persistable. Use a microflow data source for the selectable objects to use a non-persistable entity here.