urlsnail/app/Models/Bookmark.php

<?php

namespace App\Models;

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

class Bookmark extends Model
{
    use HasFactory;

    protected $table = 'bookmarks';

    public function tags(): HasMany
    {
        return $this->hasMany(BookmarkTag::class, 'bookmark_id');
    }
}