liwo/app/Models/Comment.php

<?php

namespace App\Models;

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

class Comment extends Model
{
    use HasFactory;
    protected $fillable = ['business_id', 'project_id', 'task_id', 'user_id', 'body'];

    public function rules()
    {
        return [
            'body' => 'required|string|min:3|max:1000',
        ];
    }
}