bigdir/db/migrate/20130814084938_create_user_extensions.rb

class CreateUserExtensions < ActiveRecord::Migration
  class User < ActiveRecord::Base; end
  class UserExtensions < ActiveRecord::Base; end
  def self.up
    create_table :user_extensions do |t|
      t.column :user_id,:integer,:null => false
      t.column :birthday,:date
      t.column :brief_introduction,:string
      t.column :gender,:integer
      t.column :location,:string
      t.column :occupation,:string
      t.column :work_experience,:integer
      t.column :zip_code,:integer
      t.timestamps
    end
    user = User.find_by_admin true
    user_extensions = UserExtensions.create :user_id => user.id,
                       :birthday => nil,
                       :brief_introduction => "",
                       :gender => 1,
                       :location => "",
                       :occupation => nil,
                       :work_experience => nil
  end

  def self.down
    drop_table :user_extensions
  end
end