adopt-a-hydrant/db/migrate/00000000000003_create_reminders.rb

class CreateReminders < ActiveRecord::Migration
  def change
    create_table :reminders do |t|
      t.timestamps
      t.integer :from_user_id, :null => false
      t.integer :to_user_id, :null => false
      t.integer :hydrant_id, :null => false
      t.boolean :sent, :default => false
    end

    add_index :reminders, :from_user_id
    add_index :reminders, :to_user_id
    add_index :reminders, :hydrant_id
    add_index :reminders, :sent
  end
end