firefly-iii/app/Models/PiggyBankRepetition.php

<?php namespace FireflyIII\Models;

use Illuminate\Database\Eloquent\Model;

/**
 * Class PiggyBankRepetition
 *
 * @package FireflyIII\Models
 */
class PiggyBankRepetition extends Model
{

    /**
     * @return array
     */
    public function getDates()
    {
        return ['created_at', 'updated_at', 'startdate', 'targetdate'];
    }

    /**
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function piggyBank()
    {
        return $this->belongsTo('FireflyIII\Models\PiggyBank');
    }

}