我相信这是Eloquent事件(http://laravel.com/docs/eloquent#model-events)的一个完美用例。你可以使用"deleting"事件来进行清理:

class User extends Eloquent { public function photos() { return $this->has_many('Photo'); } // this is a recommended way to declare event handlers public static function boot() { parent::boot(); static::deleting(function($user) { // before delete() method call this $user->photos()->delete(); // do the rest of the cleanup... }); } } You should probably also put the whole thing inside a transaction, to ensure the referential integrity..

在定义模型迁移时最好使用onDelete级联。它负责为你删除模型的关系:

e.g.

 $table->foreign(’user_id’)
  ->references(’id’)->on(’users’)
  ->onDelete(’cascade’);

如果您碰巧发现自己正在考虑如何删除一个模型及其关系到大于3或4个嵌套关系的级别，那么您应该考虑重新定义您的模型关系。

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……

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');
}

这里有一些完美的解决方案。

# model

public function order_item_properties()
{
    return $this->hasMany(OrderItemProperty::class, 'order_id', 'id');
}

public function order_variations()
{
    return $this->hasMany(OrderItemVariation::class, 'order_id', 'id');
}

# controller

$order_item = OrderItem::find($request->order_id);

$order_item->order_item_properties()->delete();
$order_item->order_variations()->delete();

$order_item->delete();

return response()->json([
    'message' => 'Deleted',
]);

我相信这是Eloquent事件(http://laravel.com/docs/eloquent#model-events)的一个完美用例。你可以使用"deleting"事件来进行清理:

class User extends Eloquent { public function photos() { return $this->has_many('Photo'); } // this is a recommended way to declare event handlers public static function boot() { parent::boot(); static::deleting(function($user) { // before delete() method call this $user->photos()->delete(); // do the rest of the cleanup... }); } } You should probably also put the whole thing inside a transaction, to ensure the referential integrity..