如何获得一维的标量数组作为一个学说的dql查询结果? [英] How to get a one-dimensional scalar array as a doctrine dql query result?
问题描述
我想从拍卖表格的id列中获取一组值。
如果这是一个原始SQL,我会写:
I want to get an array of values from the id column of the Auction table. If this was a raw SQL I would write:
SELECT id FROM auction
但是当我在Doctrine中执行此操作并执行:
But when I do this in Doctrine and execute:
$em->createQuery("SELECT a.id FROM Auction a")->getScalarResult();
我收到一个这样的数组:
I get an array like this:
array(
array('id' => 1),
array('id' => 2),
)
相反,我想得到一个这样的数组:
Instead, i'd like to get an array like this:
array(
1,
2
)
如何使用Doctrine?
How can I do that using Doctrine?
推荐答案
PHP< 5.5
您可以使用 array_map
,而且由于您只有每个数组的项目,您可以优雅地使用
'current'
作为回调,而不是写一个关闭 。
PHP < 5.5
You can use array_map
, and since you only have on item per array, you can elegantly use
'current'
as callback, instead of writing a closure.
$result = $em->createQuery("SELECT a.id FROM Auction a")->getScalarResult();
$ids = array_map('current', $result);
请参阅 Petr Sobotka的下面的答案有关内存使用的其他信息。
See Petr Sobotka's answer below for additional info regarding memory usage.
PHP> = 5.5
As jcbwlkr的回答如下,推荐使用的方式 array_column
。
PHP >= 5.5
As jcbwlkr's answered below, the recommended way it to use array_column
.
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