Laravel QueryException绕过try-catch？

Question

我正在使用Laravel 4和Eloquent ORM.在我的系统中,当有人删除记录时,必须检查它是否有任何相关记录.如果没有,则可以永久删除.但如果确实如此,只需执行softDeletion即可.

处理这种情况的方法是:尝试强制删除,如果由于引用完整性而抛出异常,则捕获它和softDelete.我知道这看起来很花哨,但它是由另一个开发人员制作的,我宁愿不要弄乱他的代码.

他所做的就是删除,然后如果它抛出异常,只需设置一个标志来"停用"记录.它确实运作良好.然而,当我接手时,我实现了softDeleting以减少花哨的东西.

现在,当它尝试强制删除时,它会抛出QueryException,但不会落入catch块.我已经尝试将Exception更改为\ Exception,QueryException,Illuminate\Database\QueryException,但没有成功.有任何想法吗？

为了更好地说明它:

就像这样:

try
{
    $contact->delete();
}
catch(Exception $ex)
{
    $contact->status = 0;
    $contact->save();
    //this works
}

而现在它是这样的:

protected $softDelete = true;

....

try
{
    $contact->forceDelete();
}
catch(Exception $ex)
{
    $contact->delete();
    //this doesn't work
}

萤火虫响应:

{"error":{"type":"Illuminate\\Database\\QueryException","message":"SQLSTATE[23000]: Integrity constraint violation: 1451 
Cannot delete or update a parent row: a foreign key constraint fails (`tst_db\/contact_company`, CONSTRAINT `fk_contact_company_contacts_id` 
FOREIGN KEY (`contact_id`) REFERENCES `contacts` (`id`) ON DELETE NO ACTION ON UPDATE CASCADE) 
(SQL: delete from `contacts` where `id` = 28)","file":"\/Applications\/XAMPP\/xamppfiles\/htdocs\/application\/vendor\/laravel\/framework\/src\/Illuminate\/Database\/Connection.php","line":555}}

这是Illuminate/Database/Eloquent/Builder.php中的forceDelete()函数:

    public function forceDelete()
{
    return $this->query->delete();
}

Answer 1

您将调用包含以下代码$contact->forceDelete();的方法：Illuminate\Database\Eloquent\Model

public function forceDelete()
{
    $softDelete = $this->softDelete;

    // We will temporarily disable false delete to allow us to perform the real
    // delete operation against the model. We will then restore the deleting
    // state to what this was prior to this given hard deleting operation.
    $this->softDelete = false;

    $this->delete();

    $this->softDelete = $softDelete;
}

现在发生的情况是您的代码将在上面出错$this->delete();并抛出异常。

因此它到达了您的catch，因此您$contact->delete();再次致电。所以它得到了另一个QueryException，没有$this->softDelete设置回来true。

您需要做的就是重新设置软删除并尝试再次删除它：

try
{
    $contact->forceDelete();
}
catch(Exception $ex)
{
    $contact->softDelete = true;
    $contact->delete();
}