Mysql 如何级联删除多态表？

我想做的是每次我删除一条思想记录时，我想删除多态性属于该思想记录的注释

ThoughtRecordController

public function destroy(ThoughtRecord $thoughtRecord)
{
    $thoughtRecord->delete();
}

思维记录模型

public function comments()
{
    return $this->morphMany('App\Comment', 'commentable');
}

public function commentable()
{
    return $this->morphTo();
}

评论模式

public function comments()
{
    return $this->morphMany('App\Comment', 'commentable');
}

public function commentable()
{
    return $this->morphTo();
}

思想记录表

$table->bigIncrements('id');
$table->integer('user_id');
$table->boolean('is_authorized')->default(false);
$table->string('title')->nullable();
$table->timestamps();

$table->increments('id');
$table->integer('commentable_id');
$table->string('commentable_type');
$table->integer('user_id');
$table->text('content');
$table->timestamps();

评论表

$table->bigIncrements('id');
$table->integer('user_id');
$table->boolean('is_authorized')->default(false);
$table->string('title')->nullable();
$table->timestamps();

$table->increments('id');
$table->integer('commentable_id');
$table->string('commentable_type');
$table->integer('user_id');
$table->text('content');
$table->timestamps();

---

一个选项：

使用此软件包管理级联删除：

第二选项：

你可以听听拉威尔提供的活动

 protected static function boot()
    {
        parent::boot();

            // cause a delete of a poster to cascade
            // to children so they are also deleted
            static::deleting(function ($poster) {

                            $photos->photos->delete();

                        $poster->comments()->delete();

            });

    }

第三个选项：

当你使用多态关系时，你可能也会把它当作一种特质。如果是这种情况，您可以通过连接到deleting事件来删除trait引导方法中的关系

<?php namespace Company\Package\Traits;

/**
 * This file is part of Package.
 *
 * @license MIT
 * @package Company\Package
 */

use Illuminate\Support\Facades\Config;

trait ActionableTrait
{
    /**
     * Morph Many relation with Task.
     *
     * @return \Illuminate\Database\Eloquent\Relations\MorphMany
     */
    public function actions()
    {
        return $this->morphMany(Config::get('crm.action'),'actionable');
    }

    protected static function bootActionableTrait()
    {
        self::deleting(function ($model) {
            $model->actions()->delete();
        });
    }
}

---

阅读它

你的模型设计是错误的。它是怎么错的？我的评论与其他模型有多态关系。