added artists, comments

db/migrate/20100214080557_create_artist_versions.rb

@@ -0,0 +1,23 @@
+class CreateArtistVersions < ActiveRecord::Migration
+  def self.up
+    create_table :artist_versions do |t|
+      t.column :artist_id, :integer, :null => false
+      t.column :name, :string, :null => false
+      t.column :updater_id, :integer, :null => false
+      t.column :updater_ip_addr, "inet", :null => false
+      t.column :is_active, :boolean, :null => false, :default => true
+      t.column :other_names, :text
+      t.column :group_name, :string
+      t.column :url_string, :text
+      t.timestamps
+    end
+    
+    add_index :artist_versions, :artist_id
+    add_index :artist_versions, :name
+    add_index :artist_versions, :updater_id
+  end
+
+  def self.down
+    drop_table :artist_versions
+  end
+end