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: 20121228164327_create_assessment_user_data.rb
    path of file: ./repos/Autolab/db/migrate
    
    the code of the file until where you have to start completion: class CreateAssessmentUserData < ActiveRecord::Migration[4.2]
  def self.initialize_AUDs_modulo_callbacks(asmt)
    # create all AUDs
    Rails.logger.info "Creating AUDs for #{asmt.course.name}/#{asmt.name}..."
    crea
    
  def self.up
    create_table :assessment_user_data do |t|
      t.integer :user_id, :null => false
      t.integer :assessment_id, :null => false
      t.integer :latest_submission_id
      
      t.timestamps
    end

    add_index :assessment_user_data, :user_id
    add_index :assessment_user_data, :assessment_id
    add_index :assessment_user_data, :latest_submission_id, :unique => true
    add_index :assessment_user_data, [ :user_id, :assessment_id ], :unique => true

    Assessment.find_each { |asmt| initialize_AUDs_modulo_callbacks asmt }
  end