limit users to proper role, Fixes #135

src/model/logbook.rs

@@ -264,6 +264,10 @@ ORDER BY departure DESC
             return Err(LogbookCreateError::BoatNotFound);
         };
 
+        if boat.amount_seats == 1 && log.rowers.is_empty() {
+            log.rowers = vec![created_by_user.id];
+        }
+
         if boat.amount_seats == 1 {
             log.shipmaster = Some(log.rowers[0]);
             log.steering_person = Some(log.rowers[0]);