ActiveRecord::Schema.define do create_table :test_myisam, :options=>'ENGINE=MyISAM', :force=>true do |t| t.column :my_name, :string, :null=>false t.column :description, :string end create_table :test_innodb, :options=>'ENGINE=InnoDb', :force=>true do |t| t.column :my_name, :string, :null=>false t.column :description, :string end create_table :test_memory, :options=>'ENGINE=Memory', :force=>true do |t| t.column :my_name, :string, :null=>false t.column :description, :string end end