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: 20131223171005_create_top_topics.rb
    path of file: ./repos/discourse/db/migrate
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class CreateTopTopics < ActiveRecord::Migration[4.2]
  PERIODS = %i[yearly monthly weekly daily]
  SORT_ORDERS = %i[posts views likes]

  def change
    create_table :top_topics, force: true do |t|
    
    
  def change
    create_table :top_topics, force: true do |t|
      t.belongs_to :topic

      PERIODS.each do |period|
        SORT_ORDERS.each do |sort|
          t.integer "#{period}_#{sort}_count".to_sym, null: false, default: 0
        end
      end
    end

    add_index :top_topics, :topic_id, unique: true

    PERIODS.each do |period|
      SORT_ORDERS.each do |sort|
        add_index :top_topics, "#{period}_#{sort}_count".to_sym, order: "desc"
      end
    end
  end