Sample migration with data update

migration.rb

class CreateUserProfiles < ActiveRecord::Migration
  def self.up
    create_table :user_profiles do |t|
      t.string :locale, :default => :es
      t.string :glucose_test_unit, :default => :mgdl
      t.string :location
      
      t.references :user
      
      t.timestamps
    end
    
    User.all.each do |user|
      user.create_user_profile({
        :locale => UserProfile::LOCALES.first,
        :glucose_test_unit => UserProfile::GLUCOSE_TEST_UNITS.first
      }) if user.user_profile.nil?
      say "creating user profile for #{user}!" if user.user_profile.nil?
    end
  end

  def self.down
    drop_table :user_profiles
  end
end