class DropSessionTable < ActiveRecord::Migration[4.2] def up drop_table "sessions" end def down create_table "sessions" do |t| t.column "session_id", :string t.column "data", :text t.column "created_at", :timestamp t.column "updated_at", :timestamp end add_index "sessions", ["session_id"], :name => "sessions_session_id_idx", :unique => true end end