从 Laravel 4 的事务中返回数据

Question

我有以下代码 sn-p，但我似乎无法让它工作。

$paymentGatewayTransaction = $this->processTransaction($data);
DB::connection('new_db')->transaction(function () use ($paymentGatewayTransaction) {
    //Performing all DB transactions here to insert Order Information.
    if ($paymentGatewayTransaction['Status'] == "APPROVED")
        return Response::json(array('Status' => 'Success'), '200'); else
        return Response::json(array('Status' => 'Error'), '200');
});

function processTransaction($data) {
    //Process Gateway Transaction
    if ($gatewayWasSuccessfull)
        return array('Status' => 'APPROVED'); else
        return array('Status' => 'DECLINED');
}

5 和 7 行上的返回 Response::json() 似乎根本没有任何效果。响应永远不会到达浏览器。

如果我将 if 条件从行 4 到 8 移到闭包函数之外，它可以正常工作。

作为一种解决方法，我最终不得不执行以下操作。

$paymentGatewayTransaction = $this->processTransaction($data);
$orderObj = "";
DB::connection('new_db')->transaction(function () use ($paymentGatewayTransaction, &$orderObj) {
    //Performing all DB transactions here to insert Order Information.
    // **$orderObj is set here**
});

if ($paymentGatewayTransaction['Status'] == "APPROVED")
    return Response::json(array('Status' => 'Success', 'Order' => $orderObj->id), '200'); else
    return Response::json(array('Status' => 'Error'), '200');

function processTransaction($data) {
    //Process Gateway Transaction
    if ($gatewayWasSuccessfull)
        return array('Status' => 'APPROVED'); else
        return array('Status' => 'DECLINED');
}

在闭包外部创建对象$orderObj，并通过引用事务将其作为变量在闭包函数外部使用。这可以更简单吗？或者这是使用它的方法吗？

Answer 1

你可以像这样在一个变量中分配事务闭包的返回值：

$paymentGatewayTransaction = $this->processTransaction($data);
$var = DB::connection('new_db')->transaction(function () use ($paymentGatewayTransaction) {
    //Performing all DB transactions here to insert Order Information.
    if ($paymentGatewayTransaction['Status'] == "APPROVED")
        return Response::json(array('Status' => 'Success'), '200'); else
        return Response::json(array('Status' => 'Error'), '200');
});
return $var;

然后就可以使用 $var 来返回了。