gistfile1.php

	public function scopeVisible($query) {
		return $query
				->where('hidden', '=', false)
				->where('state', '=', 'published');
	}

	public function scopeAccessible($query) {
		return $query
				->where('hidden', '=', false)
				->where(function($query){
					$query
						->where('state', '=', 'preview')
						->orWhere('state', '=', 'published');
				});
	}