004_add_sessions.rb

来自「ruby on rails web敏捷开发之路第二版 源代码」· RB 代码 · 共 21 行

#---
# Excerpted from "Agile Web Development with Rails, 2nd Ed."
# We make no guarantees that this code is fit for any purpose. 
# Visit http://www.pragmaticprogrammer.com/titles/rails2 for more book information.
#---
class AddSessions < ActiveRecord::Migration
  def self.up
    create_table :sessions do |t|
      t.column :session_id, :string
      t.column :data, :text
      t.column :updated_at, :datetime
    end
    
    add_index :sessions, :session_id
  end

  def self.down
    drop_table :sessions
  end
end