如何在 Eloquent 中删除多态关系？

我有一个这样的模型：

<?php

class Post extends Eloquent {
    protected $fillable = [];


    public function photos()
    {
        return $this->morphMany('Upload', 'imageable');
    }

    public function attachments()
    {
        return $this->morphMany('Upload', 'attachable');
    }

}

and my morphMany表的架构是这样的：

CREATE TABLE `uploads` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`raw_name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`size` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`downloads` int(11) NOT NULL DEFAULT '0',
`imageable_id` int(11) DEFAULT NULL,
`imageable_type` varchar(32) COLLATE utf8_unicode_ci NOT NULL,
`attachable_id` int(11) DEFAULT NULL,
`attachable_type` varchar(32) COLLATE utf8_unicode_ci NOT NULL,
`user_id` int(10) unsigned NOT NULL,
`created_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
`updated_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
PRIMARY KEY (`id`),
KEY `uploads_user_id_index` (`user_id`),
CONSTRAINT `uploads_user_id_foreign` FOREIGN KEY (`user_id`) REFERENCES `posts` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=45 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

现在我需要删除该表的一行，我尝试过$posts->photos()->delete();但它删除了与此关联的所有行Post.

有人可以帮助我吗？

$posts->photos()是返回帖子的所有照片的关系查询。如果你打电话delete()在此之后，它将删除所有这些记录。如果您只想删除特定记录，则需要确保仅对要删除的记录调用delete。例如：

$posts->photos()->where('id', '=', 1)->delete();