Make sure that related shows are unique

data/db-sqldelight/src/commonMain/sqldelight/app/tivi/data/related_shows.sq

@@ -13,6 +13,8 @@ CREATE INDEX IF NOT EXISTS `index_related_shows_show_id` ON `related_shows` (`sh
 
 CREATE INDEX IF NOT EXISTS `index_related_shows_other_show_id` ON `related_shows` (`other_show_id`);
 
+CREATE UNIQUE INDEX IF NOT EXISTS `index_related_shows_unique` ON `related_shows` (`show_id`, `other_show_id`);
+
 -- queries
 
 entries:

data/db-sqldelight/src/commonMain/sqldelight/migrations/33.sqm

@@ -0,0 +1,10 @@
+
+-- delete duplicate related shows
+DELETE FROM `related_shows` WHERE rowid NOT IN (
+  SELECT MIN(rowid)
+    FROM related_shows
+    GROUP BY show_id, other_show_id
+);
+
+-- finally add an index to make sure this doesn't happen in the future
+CREATE UNIQUE INDEX IF NOT EXISTS `index_related_shows_unique` ON `related_shows` (`show_id`, `other_show_id`);

data/relatedshows/src/commonMain/kotlin/app/tivi/data/relatedshows/RelatedShowsStore.kt

@@ -52,7 +52,7 @@ class RelatedShowsStore(
                 showId = showId,
                 otherShowId = showDao.getIdOrSavePlaceholder(show),
               )
-            }
+            }.distinctBy { it.otherShowId }
           }
         }
       }