Model.php

Model.php

<?php

use Illuminate\Database\Eloquent\Model as Eloquent;

class Model extends Eloquent {
  
	public function scopeNext($query)
	{
		$id = $this->getKeyName();
		$query = $this->newQuery();
		
		return $query->where($id, '<', $this->getAttribute($id))->max($id);
	}
  
	public function scopePrevious($query)
	{
		$id = $this->getKeyName();
		$query = $this->newQuery();
		
		return $query->where($id, '>', $this->getAttribute($id))->min($id);
	}
  
}