class CreateArticleVersions < ActiveRecord::Migration[6.0]
  def change
    create_table :article_versions do |t|
      t.bigint :article_id
      t.bigint :version_id
      t.timestamps
    end
    add_index :article_versions, [:article_id, :version_id], unique: true
    add_index :article_versions, :version_id
  end
end