class CreateParksByStates < ActiveRecord::Migration[8.0]
  def change
    create_table :parks_by_states do |t|
      t.string :park_code, null: false
      t.string :state, null: false

      t.timestamps
    end

    add_index :parks_by_states, [:state, :park_code], unique: true
    add_index :parks_by_states, :park_code
    add_foreign_key :parks_by_states, :parks, column: :park_code, primary_key: :code
  end
end