:conditions => [ "visible = ? AND member_type='Way' and member_id=? ", true, self.id])
- raise OSM::APIPreconditionFailedError.new("You need to make sure that the way with id: #{self.id} is not a member of the relation with id #{rel.id}.") if rel
+ raise OSM::APIPreconditionFailedError.new("Way #{self.id} still used by relation #{rel.relation.id}.") if rel