spp-paud/app/Models/Periode.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

class Periode extends Model
{
    use SoftDeletes;

    protected $table = 'periode';

    protected $fillable = [
        'nama',
        'tgl_mulai',
        'tgl_selesai',
        'is_active'
    ];

    public function kelas(){
        return $this->hasMany('App\Models\Kelas','periode_id','id');
    }
}