db/migrate/20080922155721_has_messages_to_version_2.rb
class HasMessagesToVersion2 < ActiveRecord::Migration
def self.up
create_table :messages do |t|
t.references :sender, :polymorphic => true, :null => false
t.text :subject
t.text :body
t.string :state, :null => false
t.datetime :hidden_at
t.string :type
t.timestamps
end
create_table :message_recipients do |t|
t.references :message, :null => false
t.references :receiver, :polymorphic => true, :null => false
t.string :kind, :null => false
t.integer :position
t.string :state, :null => false
t.datetime :hidden_at
end
add_index :message_recipients, [:message_id, :kind, :position], :unique => true
end
def self.down
drop_table :messages
drop_table :message_recipients
end
end