class CreateMeasurements < ActiveRecord::Migration
  def self.up
    create_table :surveys do |t|
      t.references :object
      t.string :measurement_type
      t.integer :integer_data
      t.string :string_data
      t.datetime :datetime_data
      t.timestamps
    end

    add_index :measurements, :object_id
    add_index :measurements, :measurement_type
  end

  def self.down
    drop_table :measurements
  end
end