Laravel 3 Eloquent single object caching

base.php

<?php

/**
 * Override eloquent to provide caching on single objects.
 * Note: This will cache items forever, and will create new cache files
 * upon updates, so that the latest cache item will always be used.
 * The goal is to move towards this approach:
 * https://signalvnoise.com/posts/3113-how-key-based-cache-expiration-works
 * 
 * P.S this should be used with Memcached
 */

class Base extends Eloquent {

	private function getModelName()
	{
		return strtolower(get_class($this));
	}

	public function save(array $options = array())
	{
		parent::save($options);

		if (static::$cacheable)
		{
			$model_name = $this->getModelName();
			$cache_timestamp =  strtotime($this->updated_at);

			Cache::forever($model_name . '-' . $this->id . '-timestamp', $cache_timestamp);
			Cache::forever($model_name . '-' . $this->id . '-' . $cache_timestamp, $this);
		}
	}

	public function find($id)
	{
		$model_name = $this->getModelName();
		$cache_key = $model_name . '-' . $id . '-timestamp';
		
		if (Cache::has($cache_key))
		{
			$timestamp = Cache::get($cache_key);
			return Cache::get($model_name . '-' . $id . '-' . $timestamp);
		}

		return parent::find($id);
	}
}