delete schedules that use legacy collections, reset all posters

ErsatzTV.Infrastructure/Migrations/20210220220723_ScheduleCollectionTypes.cs

@@ -112,6 +112,17 @@ namespace ErsatzTV.Infrastructure.Migrations
                 "TelevisionShows",
                 principalColumn: "Id",
                 onDelete: ReferentialAction.Restrict);
+
+            // delete program schedule items that referenced television collections (that no longer exist)
+            migrationBuilder.Sql(
+                "delete from ProgramScheduleItems where MediaCollectionId not in (select Id from SimpleMediaCollections)");
+            
+            // delete television collections that no longer exist/work
+            migrationBuilder.Sql(
+                "delete from MediaCollections where Id not in (select Id from SimpleMediaCollections)");
+            
+            // delete all posters so they are all re-cached with a higher resolution
+            migrationBuilder.Sql("update MediaItems set Poster = null");
         }
 
         protected override void Down(MigrationBuilder migrationBuilder)