Add: #641 preview_cards、media_attachmentsにインデックスを追加 (#674)

db/post_migrate/20240326231854_improve_preview_cards_vacuum.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+class ImprovePreviewCardsVacuum < ActiveRecord::Migration[7.1]
+  disable_ddl_transaction!
+
+  def change
+    add_index :preview_cards, :id, name: 'index_preview_cards_vacuum', where: "image_file_name IS NOT NULL AND image_file_name <> ''", algorithm: :concurrently
+    add_index :media_attachments, :id, name: 'index_media_attachments_vacuum', where: "file_file_name IS NOT NULL AND remote_url <> ''", algorithm: :concurrently
+  end
+end