Select only the Exercises' ids for UpdateSlugs

Author: Dantemss

app/routines/update_slugs.rb

@@ -6,7 +6,7 @@ class UpdateSlugs
   def exec
     Exercise.preload(:publication).in_batches(of: 100, load: true) do |exercises|
       Exercise.transaction do
-        updated_exercise_ids = exercises.filter(&:set_slug_tags!).map(&:id)
+        updated_exercise_ids = exercises.select(:id).filter(&:set_slug_tags!).map(&:id)
         next if updated_exercise_ids.empty?
 
         Exercise.where(id: updated_exercise_ids).update_all updated_at: Time.current