kangana/application/migrations/kangana/20161012090530_course-groups.php

<?php defined('SYSPATH') OR die('No direct script access.');

/**
 * course_groups
 */
class Migration_Kangana_20161012090530 extends Minion_Migration_Base {

  /**
   * Run queries needed to apply this migration
   *
   * @param Kohana_Database $db Database connection
   */
  public function up(Kohana_Database $db)
  {
    $db->query(NULL, "
CREATE TABLE IF NOT EXISTS `courses_groups` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `course_id` int(11) NOT NULL,
  `group_id` int(11) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `fk_courses_groups_course_index` (`course_id`),
  KEY `fk_courses_groups_group_index` (`group_id`)
) ENGINE=InnoDB;");

    $db->query(NULL, "
ALTER TABLE `courses_groups`
  ADD CONSTRAINT `fk_courses_groups_course` FOREIGN KEY (`course_id`) REFERENCES `courses` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
  ADD CONSTRAINT `fk_courses_groups_group` FOREIGN KEY (`group_id`) REFERENCES `groups` (`id`) ON DELETE CASCADE ON UPDATE CASCADE;
    ");

    $db->query(NULL, "
CREATE TABLE IF NOT EXISTS `subscriptions_groups` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `subscription_id` int(11) NOT NULL,
  `group_id` int(11) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `fk_subscriptions_groups_subscription_index` (`subscription_id`),
  KEY `fk_subscriptions_groups_group_index` (`group_id`)
) ENGINE=InnoDB;");

    $db->query(NULL, "
ALTER TABLE `subscriptions_groups`
  ADD CONSTRAINT `fk_subscriptions_groups_subscription` FOREIGN KEY (`subscription_id`) REFERENCES `subscriptions` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
  ADD CONSTRAINT `fk_subscriptions_groups_group` FOREIGN KEY (`group_id`) REFERENCES `groups` (`id`) ON DELETE CASCADE ON UPDATE CASCADE;
    ");
  }

  /**
   * Run queries needed to remove this migration
   *
   * @param Kohana_Database $db Database connection
   */
  public function down(Kohana_Database $db)
  {
    $db->query(NULL, "DROP TABLE `subscriptions_groups`");
    $db->query(NULL, "DROP TABLE `courses_groups`");
  }

}