remove unused post/topic custom fields

db/migrate/20240905024953_move_solved_topic_custom_field_to_discourse_solved_solutions.rb

@@ -36,14 +36,51 @@ class MoveSolvedTopicCustomFieldToDiscourseSolvedSolutions < ActiveRecord::Migra
       AND ua.action_type = #{UserAction::SOLVED}
     SQL
 
-    # execute <<-SQL
-    #   DELETE FROM post_custom_fields
-    #   WHERE name = 'is_accepted_answer'
-    # SQL
+    execute <<-SQL
+      DELETE FROM post_custom_fields
+      WHERE name = 'is_accepted_answer'
+    SQL
+
+    execute <<-SQL
+      DELETE FROM topic_custom_fields
+      WHERE name = 'solved_auto_close_topic_timer_id'
+    SQL
   end
 
   def down
-    # raise ActiveRecord::IrreversibleMigration
+    execute <<-SQL
+      INSERT INTO topic_custom_fields (
+        topic_id,
+        name,
+        value,
+        created_at,
+        updated_at
+      ) SELECT DISTINCT
+        topic_id,
+        'solved_auto_close_topic_timer_id',
+        CAST(topic_timer_id AS TEXT),
+        created_at,
+        updated_at
+      FROM discourse_solved_solutions tc
+      WHERE tc.topic_timer_id IS NOT NULL
+    SQL
+
+    execute <<-SQL
+      INSERT INTO post_custom_fields (
+        post_id,
+        name,
+        value,
+        created_at,
+        updated_at
+      ) SELECT DISTINCT
+        answer_post_id,
+        'is_accepted_answer',
+        'true',
+        created_at,
+        updated_at
+      FROM discourse_solved_solutions
+    SQL
+
     remove_index :discourse_solved_solutions, :topic_id
     remove_index :discourse_solved_solutions, :answer_post_id