你可以使用这种方法作为替代。

将会发生什么，我们采取与用户表相关联的所有表和删除相关的数据使用循环

$tables = DB::select("
    SELECT
        TABLE_NAME,
        COLUMN_NAME,
        CONSTRAINT_NAME,
        REFERENCED_TABLE_NAME,
        REFERENCED_COLUMN_NAME
    FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
    WHERE REFERENCED_TABLE_NAME = 'users'
");

foreach($tables as $table){
    $table_name =  $table->TABLE_NAME;
    $column_name = $table->COLUMN_NAME;

    DB::delete("delete from $table_name where $column_name = ?", [$id]);
}

在想要删除的模型上添加删除功能 定义模型的关系

例如在这个例子中:

/**
 * @return bool|null
 */
public function delete(): ?bool
{
    $this->profile()->delete();
    $this->userInterests()->delete();
    $this->userActivities()->delete();
    $this->lastLocation()->delete();

    return parent::delete();
}

用户模型中的关系为:

public function profile()
{
    return $this->hasOne(Profile::class, 'user_id', 'id');
}

public function userInterests()
{
    return $this->hasMany(userInterest::class, 'user_id', 'id');
}

public function userActivities()
{
    return $this->hasMany(userActivity::class, 'user_id', 'id');
}

public function lastLocation()
{
    return $this->hasOne(LastLocation::class, 'user_id', 'id');
}

$table->foreignId('user_id')->constrained('user')->cascadeOnDelete();

or

$table->foreignId('user_id')->constrained()->cascadeOnDelete();

注意:这个答案是为Laravel 3编写的。因此，在Laravel的最新版本中可能会或可能不会很好地工作。

在真正删除用户之前，您可以删除所有相关照片。

<?php

class User extends Eloquent
{

    public function photos()
    {
        return $this->has_many('Photo');
    }

    public function delete()
    {
        // delete all related photos 
        $this->photos()->delete();
        // as suggested by Dirk in comment,
        // it's an uglier alternative, but faster
        // Photo::where("user_id", $this->id)->delete()

        // delete the user
        return parent::delete();
    }
}

希望能有所帮助。

我在《Laravel 8》中使用了这种方法:

public static function boot() {

    parent::boot();
    
    static::deleted(function($item){
        $item->deleted_by = \Auth::id(); // to know who delete item, you can delete this row
        $item->save();  // to know who delete item, you can delete this row
        foreach ($item->photos as $photo){
            $photo->delete();
        }
    });
}

public function photos()
{
    return $this->hasMany('App\Models\Photos');
}

注意:在此语法中删除$user->photos()->delete();对我没用……

你可以在你的迁移中设置这个:

表- >外国(user_id) - >引用(id) - >(“用户”)——> onDelete(“级联”);

来源:http://laravel.com/docs/5.1/migrations外键约束

您还可以为“on delete”和“on .”指定所需的操作 更新约束的属性: 表- >外国美元(“user_id”) - >引用(id) - >(“用户”) - > onDelete(“级联”);