added artists, comments

db/migrate/20100214080549_create_artists.rb

@@ -0,0 +1,22 @@
+class CreateArtists < ActiveRecord::Migration
+  def self.up
+    create_table :artists do |t|
+      t.column :name, :string, :null => false
+      t.column :creator_id, :integer, :null => false
+      t.column :is_active, :boolean, :null => false, :default => true
+      t.column :other_names, :text
+      t.column :other_names_index, "tsvector"
+      t.column :group_name, :string
+      t.timestamps
+    end
+
+    add_index :artists, :name, :unique => true
+    add_index :artists, :group_name
+    execute "CREATE INDEX index_artists_on_other_names_index ON artists USING GIN (other_names_index)"
+    execute "CREATE TRIGGER trigger_artists_on_update BEFORE INSERT OR UPDATE ON artists FOR EACH ROW EXECUTE PROCEDURE tsvector_update_trigger('other_names_index', 'public.danbooru', 'other_names')"
+  end
+
+  def self.down
+    drop_table :artists
+  end
+end