forge/app/Models/Mod.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Casts\Attribute;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\SoftDeletes;
use Illuminate\Support\Str;

class Mod extends Model
{
    use HasFactory, SoftDeletes;

    protected $fillable = [
        'user_id',
        'name',
        'slug',
        'description',
        'license_id',
        'source_code_link',
    ];

    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }

    public function license(): BelongsTo
    {
        return $this->belongsTo(License::class);
    }

    public function versions(): HasMany
    {
        return $this->hasMany(ModVersion::class);
    }

    protected function slug(): Attribute
    {
        return Attribute::make(
            get: fn (string $value) => strtolower($value),
            set: fn (string $value) => Str::slug($value),
        );
    }
}