Yeah. I think the 0..1 case is cleaner as a nil/not nil vs a collection. The issue just doesn't go away. users.addresses.first&.street or whatever functional vo

Yeah. I think the 0..1 case is cleaner as a nil/not nil vs a collection. The issue just doesn't go away. users.addresses.first&.street or whatever functional voodoo that buries if/else - users.addresses.map(&:street).first. You just end up switching empty/not empty list rather than nil/not nil. And the interface makes it look like a 0..n relationship which is super confusing for anyone not clued in to the pattern.