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: 20220420191641_create_commits.rb
    path of file: ./repos/rails_charts/test/dummy/db/migrate
    
    the code of the file until where you have to start completion: class CreateCommits < ActiveRecord::Migration[7.0]
  def change
    create_
    
  def change
    create_table :commits do |t|
      t.datetime :created_at
    end

    Commit.generate_random_data
  end