Client.php

<?php

use Jenssegers\Mongodb\Model as Eloquent;

class Client extends Eloquent {

	protected $collection = 'clients';
	protected static $unguarded = true;

	public function users()
	{
		return $this->belongsToMany('User');
	}

	public function photo()
    {
        return $this->morphOne('Photo', 'imageable');
    }
}