How to use before and after rules on date fields?

[vmihaly2020]

How to use before and after rules on date fields? none of this won't work ->rules('required', 'date', 'before:b_enddate')) ->rules('required', 'date', 'before:blackout.b_enddate')) ->rules('required', 'date', 'before:blackout.attributes.b_enddate)) The layout's unique identifier is blackout and I have two fields b_startdate and b_enddate both is casted to date