views_redirect_relationship.install

<?php
/**
 * @file
 * Contains install and update functions for views_redirect_relationship.
 *
 * Creates/deletes redirect database field for nid & updates db schema.
 */

/**
 * Implements hook_enable().
 *
 * Create a database field `nid` in the redirects table and
 * updates the database schema.
 */
function views_redirect_relationship_enable() {
  $schema = drupal_get_schema('redirect');

  if ($schema) {
    db_add_field('redirect', 'nid', $schema['fields']['nid']);
  }

  views_redirect_relationship_generate_all();
}

/**
 * Implements hook_disable().
 *
 * Drops the database field and updates the database schema.
 */
function views_redirect_relationship_disable() {
  $schema = drupal_get_schema('redirect');

  if ($schema) {
    db_drop_field('redirect', 'nid', $schema['fields']['nid']);
  }
}

/**
 * Implements hook_schema_alter().
 */
function views_redirect_relationship_schema_alter(&$schema) {
  if (isset($schema['redirect'])) {
    $schema['redirect']['fields']['nid'] = array(
      'type' => 'int',
      'unsigned' => TRUE,
      'not null' => TRUE,
      'default' => 0,
      'description' => 'The {node}.nid of the node that the redirect points to.',
    );
  }
}