do not require ds100 codes in API responses

these are not present when other hafas backends than the DB one were
used for the trip's checkin.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/traits.rs b/src/traits.rs
index 091709a..b4b74e7 100644
--- a/src/traits.rs
+++ b/src/traits.rs
@@ -6,7 +6,7 @@ pub trait IsStation {
   fn name(&self) -> &str;
   fn scheduled_arrival(&self) -> Option<&DateTime<Utc>>;
   fn real_arrival(&self) -> Option<&DateTime<Utc>>;
-  fn ds100(&self) -> &str;
+  fn ds100(&self) -> Option<&str>;
 
   fn to_fancy_string(&self) -> String {
     // travelynx literally sends this entire precise date in case of an
@@ -35,7 +35,7 @@ pub trait IsStation {
           text.green()
         }
       },
-      self.ds100().red(),
+      self.ds100().unwrap_or("??").red(),
       self.name()
     )
   }