Reduce number of SQL queries when slug history is maintained

[bogdan]

• Used inverse_of to load Slug#sluggable from memory instead of DB:
• Don't perform history maintainance for new records.

 SQL (0.3ms)  INSERT INTO `sites` (`name`, `url`, `created_at`, `updated_at`, `cached_slug`, `technical_contact_email`, `customer_service_email`, `account_id`) VALUES ('Company 1', 'http://merchant.com', '2017-11-02 13:15:40', '2017-11-02 13:15:40', 'company-1', 'technical_contact@email.com', 'customer_service@merchant.com', 1448)
- FriendlyId::Slug Load (0.4ms)  SELECT  `friendly_id_slugs`.* FROM `friendly_id_slugs` WHERE `friendly_id_slugs`.`sluggable_id` = 1031 AND `friendly_id_slugs`.`sluggable_type` = 'Site' ORDER BY `friendly_id_slugs`.id DESC LIMIT 1
- SQL (0.4ms)  DELETE FROM `friendly_id_slugs` WHERE `friendly_id_slugs`.`sluggable_id` = 1031 AND `friendly_id_slugs`.`sluggable_type` = 'Site' AND `friendly_id_slugs`.`slug` = 'company-1'
-Site Load (0.4ms)  SELECT  `sites`.* FROM `sites` WHERE `sites`.`id` = 1031 LIMIT 1
 SQL (0.6ms)  INSERT INTO `friendly_id_slugs` (`slug`, `sluggable_id`, `sluggable_type`, `created_at`) VALUES ('company-1', 1031, 'Site',

[bogdan]

Any feedback here?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.