在Count中的Doctrine 2 DQL案例

Question

我在本机MySQL代码中有这个查询

SELECT *
FROM `turn`
LEFT JOIN (
    poi
) ON ( turn.id = poi.turn_id )
GROUP BY turn.id
ORDER BY count( case when poi.image = 1 then 1 else null end) DESC;

我需要在Doctrine 2 DQL中重建它

到目前为止我的尝试是这样的:

SELECT t, COUNT((CASE WHEN Bundle\Entity\Poi p.image = 1 then 1 ELSE NULL END)) AS num
FROM Bundle\Entity\Turn t
JOIN t.pois p
GROUP BY t.id
ORDER BY num DESC

我得到这个错误:

An exception has been thrown during the rendering of a template ("[Syntax Error] line 0, col 99: Error: Expected end of string, got '.'") in Bundle:Admin:showTurnsFiltered.html.twig at line 75.

我究竟做错了什么？

Answer 1

我经过几个小时的尝试和搜索后发现它,它正在使用这个DQL:

$dql = 'SELECT t, SUM(CASE WHEN p.image = 1 THEN 1 ELSE 0 END) AS numImage
                    FROM Bundle\Entity\Turn t
                    JOIN t.pois p
                    GROUP BY t.id
                    ORDER BY numImage DESC;  

重要的是,您需要使用SUM而不是COUNT