laravel -更新一对多的多态关系

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Comment extends Model
{
    public function commentable()
    {
        return $this->morphTo();
    }
}

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Post extends Model
{
    public function comments()
    {
        return $this->morphMany(Comment::class, 'commentable');
    }
}

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Video extends Model
{
    public function comments()
    {
        return $this->morphMany(Comment::class, 'commentable');
    }
}

$post = Post::find(1);

$comments = $post->comments;

foreach ($comments as $comment) {
    $comment->content = 'Updated content';
    $comment->save();
}

$post->comments()->update(['content' => 'Updated content']);