fql.multiquery返回空数组

Question

我正在尝试查询一个页面的所有相册，并获得每个相册的封面照片。下面是我的代码，它返回一个空结果。

我可以分别进行这两个查询，没有问题，所以这不是权限问题。

$album_fql = "SELECT aid, owner, name, object_id, cover_pid, cover_object_id 
              FROM album
              WHERE owner = 'xxxxxxx'";

$albumpic_fql = "SELECT pid, src_small
                 FROM photo 
                 WHERE pid IN (SELECT cover_pid FROM #query1)";

$album_param = array(
                 'method'    => 'fql.multiquery',
                 'queries'   => '{"query1":"' . $album_fql . '", "query2":"' . $albumpic_fql . '"}');

$album_fqlResult = $facebook->api($album_param);

print_r($album_fqlResult);

有什么想法吗？

Answer 1

您可以在嵌套查询中执行此操作，而不是作为多查询。

SELECT pid, src_small 
FROM photo 
WHERE pid in (SELECT cover_pid FROM album where owner={page id here})

举个例子，这是我从可口可乐的Facebook主页上得到的专辑封面列表

SELECT pid, src_small 
FROM photo 
WHERE pid in (SELECT cover_pid FROM album where owner=40796308305)
LIMIT 5

返回值：

{
  "data": [
    {
      "pid": "40796308305_2143765",
      "object_id": 110516463305,
      "src_small": "https://fbcdn-photos-a.akamaihd.net/hphotos-ak-snc1/6570_110516463305_40796308305_2143765_6253354_t.jpg"
    },
    {
      "pid": "40796308305_8753877",
      "object_id": "10150500888203306",
      "src_small": "https://fbcdn-photos-a.akamaihd.net/hphotos-ak-ash4/398389_10150500888203306_40796308305_8753877_1814220329_t.jpg"
    },
    {
      "pid": "40796308305_8751674",
      "object_id": "10150500434253306",
      "src_small": "https://fbcdn-photos-a.akamaihd.net/hphotos-ak-ash4/407475_10150500434253306_40796308305_8751674_1040781388_t.jpg"
    },
    {
      "pid": "40796308305_8742570",
      "object_id": "10150498588158306",
      "src_small": "https://fbcdn-photos-a.akamaihd.net/hphotos-ak-ash4/396541_10150498588158306_40796308305_8742570_1378170213_t.jpg"
    },
    {
      "pid": "40796308305_8742259",
      "object_id": "10150498546173306",
      "src_small": "https://fbcdn-photos-a.akamaihd.net/hphotos-ak-snc7/402667_10150498546173306_40796308305_8742259_287537096_t.jpg"
    }
  ]
}

如果你想尝试多查询，那么试着从索引0开始而不是1开始命名查询，例如query0和query1这是C# SDK允许的唯一方式，也许php SDK也需要这样做。

Answer 2

终于想明白了。我必须将查询合并到1个变量中并转义单引号。

    $queries = '{

"query1" : "SELECT aid, name, cover_pid FROM album WHERE owner = \'xxxxxxxxxxx\'",

"query2" : "SELECT aid, images FROM photo WHERE pid IN (SELECT cover_pid FROM #query1)"

}';