jandl-taskmanager-app/be/app/Models/MasterTask.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class MasterTask extends Model
{
    use HasFactory;

    public $timestamps = true;

    public function subtasks()
    {
        return $this->hasMany(SubTask::class);
    }

    public function project()
    {
        return $this->belongsTo(Project::class);
    }

    public function attachments()
    {
        return $this->hasMany(Attachment::class);
    }
}