只检查Woocommerce中元数据发布的订单中的特定信息

Question

我目前正在开发一个WordPress项目，该项目上面有商店的WooCommerce插件。但是，订单中的所有结算信息都会转到wp_postmeta表，其中所有信息都保存在同一列“meta_value”中。

我有一个表格，客户可以使用他们的订单号，名字和邮政编号填写，并在提交此字段后，他们的订单将显示在网站上。

因此，在我的查询中，我只想检查用户输入的订单号，名字和邮政编号是否为真，我不需要列中的任何其他内容。

我已经使用我的凭据制作了测试订单，目前我的查询看起来像这样，但它找到了两个结果，因为wp_postmeta表中有两个字段具有相同的订单号，并且它们的顺序与订单相同：

$ordernumber = $_POST['ordernmbr'];
$orderfirstname = $_POST['firstname'];
$orderpostnumber = $_POST['postnmbr'];

$sql = $wpdb->prepare( "SELECT * FROM {$wpdb->prefix}postmeta
WHERE post_id = %d AND meta_value = %s",
$ordernumber, $orderfirstname);
$res = $wpdb->get_results($sql, ARRAY_A);

问我是否有什么不清楚，我很难解释事情！

编辑：从Vel获得帮助后更新了查询，仍未按预期工作，因为查询不希望找到任何结果。

$sql = $wpdb->prepare( "SELECT * FROM {$wpdb->prefix}postmeta
WHERE post_id = %d AND (meta_value = %s AND meta_key  ='_billing_first_name' AND  meta_value = %s AND meta_key ='_billing_postcode') ",
$ordernumber, $orderfirstname, $orderpostnumber );
$res = $wpdb->get_results($sql, ARRAY_A);

Answer 1

以下SQL查询将检查给定订单ID，名字和邮政编码是否存在条目：

$ordernumber = $_POST['ordernmbr'];
$orderfirstname = $_POST['firstname'];
$orderpostnumber = $_POST['postnmbr'];

$result = $wpdb->get_col( $wpdb->prepare( "
    SELECT pm.post_id
    FROM $wpdb->postmeta as pm
    JOIN $wpdb->postmeta as pm1 ON pm.post_id = pm1.post_id
    WHERE pm.post_id = %d
    AND pm.meta_key  ='_billing_first_name'
    AND pm.meta_value = %s
    AND pm1.meta_key ='_billing_postcode'
    AND pm1.meta_value = %s
", $ordernumber, $orderfirstname, $orderpostnumber ) );

if( sizeof($result) ) 
    $result = true;

经过测试和工作。

---

它也可以用get_post_meta() Wordpress函数这样做：

$firstname = get_post_meta( $_POST['ordernmbr'], '_billing_first_name', true );
$postnmbr  = get_post_meta( $_POST['ordernmbr'], '_billing_postcode', true );

if( $firstname == $_POST['firstname'] && $postnmbr == $_POST['postnmbr'] ) {
    // The data match
} elseif( $firstname == $_POST['firstname'] || $postnmbr == $_POST['postnmbr'] ) {
    // The data match partially
else {
    // The data don't match
}

Answer 2

谢谢大家的帮助，但实际上我自己设法解决了这个问题：

$sql = $wpdb->prepare("SELECT post_id FROM wp_postmeta
WHERE post_id = %d AND meta_key in ('_billing_first_name', '_billing_postcode')
and meta_value in ('%s', '%d')

group by post_id", $ordernumber, $orderfirstname, $orderpostnumber);

Answer 3

您需要使用meta_key。

$ordernumber = $_POST['ordernmbr'];
$orderfirstname = $_POST['firstname'];
$orderpostnumber = $_POST['postnmbr'];

$sql = $wpdb->prepare( "select * from (SELECT * FROM wp_postmeta WHERE ( meta_key = '_billing_first_name' AND meta_value =%s ) 
OR ( meta_key = '_shipping_postcode' AND meta_value =%s ) ) as p 
where post_id=%s", $orderfirstname, $orderpostnumber, $ordernumber );
$res = $wpdb->get_results($sql, ARRAY_A);

更新的查询

select * from (SELECT * FROM wp_postmeta WHERE ( meta_key = '_billing_first_name' AND meta_value ='Gnanavel' ) OR ( meta_key = '_shipping_postcode' AND meta_value ='622222' ) ) as p where post_id=2899