class CreateActivities < ActiveRecord::Migration
  def change
    create_table :activities, :id => false do |t|
      t.integer :act_id, :null => false
      t.string :act_type, :null => false
      t.integer :user_id, :null => false
    end
    add_index :activities, :user_id
    add_index :activities, [:act_id, :act_type]
    add_index :activities, [:user_id, :act_type]
  end
end