Merge pull request #1276 from rk/rk-issue-1261

[#1261] get_key now pulls from $original instead

laravel/database/eloquent/model.php

@@ -544,7 +544,7 @@ abstract class Model {
 	 */
 	public function get_key()
 	{
-		return $this->get_attribute(static::$key);
+		return array_get($this->original, static::$key);
 	}
 
 	/**