Add: #568 ハッシュタグ・メンション上限を超えた投稿もNGワード履歴に記録 (#579)

db/migrate/20240217022038_add_count_to_ngword_histories.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class AddCountToNgwordHistories < ActiveRecord::Migration[7.1]
+  disable_ddl_transaction!
+
+  def change
+    add_column :ngword_histories, :count, :integer, null: false, default: 0
+
+    add_index :ngword_histories, [:uri, :reason, :created_at], unique: false, algorithm: :concurrently
+  end
+end