You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: 20230119091654_gutentag_tables.gutentag.rb
    path of file: ./repos/alchemy_cms/spec/dummy/db/migrate
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

# This migration come
    
  def up
    create_table :gutentag_taggings do |t|
      t.integer :tag_id,        :null => false
      t.integer :taggable_id,   :null => false
      t.string  :taggable_type, :null => false
      t.timestamps :null => false
    end

    add_index :gutentag_taggings, :tag_id
    add_index :gutentag_taggings, %i[ taggable_type taggable_id ]
    add_index :gutentag_taggings, %i[ taggable_type taggable_id tag_id ],
      :unique => true, :name => "unique_taggings"

    create_table :gutentag_tags do |t|
      t.string :name, :null => false
      t.timestamps :null => false
    end

    add_index :gutentag_tags, :name, :unique => true
  end