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: 20141001170138_create_payola_sales.rb
    path of file: ./repos/libraries.io/db/migrate
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class CreatePayolaSales < ActiveRecord::Migration[5.0]
  def change
    create_table :payola_sales do |t|
      t.string   "email",         limit: 191
      t.string   "guid",          limit: 191
      t.integer  "product_id"
      t.string   "product_type", limit: 100
      t.datetime "created_at"
      t.datetime "updated_at"
      t.string   "state"
      t.string   "stripe_id"
      t.string   "stripe_token"
      t.string   "card_last4"
      t.date     "card_expiration"
      t.string   "card_type"
      t.text     "error"
      t.integer  "amount"
      t.integer  "fee_amount"
      t.integer  "coupon_id"
      t.boolean  "opt_in"
      t.integer  "download_count"
      t.integer  "affiliate_id"
     
    
  def change
    create_table :payola_sales do |t|
      t.string   "email",         limit: 191
      t.string   "guid",          limit: 191
      t.integer  "product_id"
      t.string   "product_type", limit: 100
      t.datetime "created_at"
      t.datetime "updated_at"
      t.string   "state"
      t.string   "stripe_id"
      t.string   "stripe_token"
      t.string   "card_last4"
      t.date     "card_expiration"
      t.string   "card_type"
      t.text     "error"
      t.integer  "amount"
      t.integer  "fee_amount"
      t.integer  "coupon_id"
      t.boolean  "opt_in"
      t.integer  "download_count"
      t.integer  "affiliate_id"
      t.text     "customer_address"
      t.text     "business_address"
      t.timestamps
    end

    add_index "payola_sales", ["coupon_id"], name: "index_payola_sales_on_coupon_id", using: :btree
    add_index "payola_sales", %w[product_id product_type], name: "index_payola_sales_on_product", using: :btree
    add_index "payola_sales", ["email"], name: "index_payola_sales_on_email", using: :btree
    add_index "payola_sales", ["guid"], name: "index_payola_sales_on_guid", using: :btree
  end