注意：原生查询原则的数组结果中未定义索引

Question

我在 Doctrine 中得到原生查询的数组结果。查询是

    $conn = $em->getConnection();
    $sql = 'SELECT * FROM Stock_drink d WHERE id=?';
    $stmt = $conn->prepare($sql);
    $stmt->bindValue(1,$idstockdrink);
    $stmt->execute();
    $stockdrink = $stmt->fetchAll();

$stockdrink 的内容是

"{"stockdrink":[{"id":"39","name":"limon","stockamount":"14","price":"2.20","Drink_id":"5","Bar_id":"12"}]}"

现在我想用这些句子获取 $stockdrink 数组的一些值，但总是得到通知未定义索引。我正在查看文档，但没有看到解决方案。

    $iddrink = $stockdrink["name"];
    $name = $stockdrink["name"];
    $price = $stockdrink["price"];

提前致谢！！！！

Answer 1

因为 fetchAll() 方法“将所有结果提取到一个数组中”，所以在您的特定情况下，您必须以这种方式修改您的代码：

$conn = $em->getConnection();
$sql = 'SELECT * FROM Stock_drink d WHERE id=?';
$stmt = $conn->prepare($sql);
$stmt->bindValue(1,$idstockdrink);
$stmt->execute();

$stockdrinks = $stmt->fetchAll();

$stockdrink = $stockdrinks[0];

$iddrink = $stockdrink["name"];
$name = $stockdrink["name"];
$price = $stockdrink["price"];

更多信息在这里http://docs.doctrine-project.org/projects/doctrine-dbal/en/latest/reference/data-retrieval-and-manipulation.html#fetchall