Doctrine 2 查询生成器 abs 函数
这项工作:
$qb = $this->em->createQueryBuilder();
$qb->select("abs(u.code) as code")
->from("User", "u")
->orderBy("code","ASC")
->getQuery()
->getArrayResult();
这行不通:
$qb = $this->em->createQueryBuilder();
$qb->select("u.code")
->from("User", "u")
->orderBy("abs(u.code)","ASC")
->getQuery()
->getArrayResult();
错误:
语法错误] 第 0 行,第 118 列:错误:预期字符串结束,得到 '('
本地学说函数 abs 仅适用于声明的选定部分,并且不要按部分订购.
The native doctrine function abs work only on a select part of statment and don't work on order by part.
观察:
1-) 我避免使用 NativeQuery.
1-) Im avoiding to use NativeQuery.
2-) u.code 是 mysql 上的 varchar 字段,需要是 varchar(有时是数字,有时是字符串),我需要像数字一样排序.
2-) u.code is a varchar fild on mysql and need to be varchar ( some times numeric and some times string), and i need to order then like a number in numeric case.
有什么帮助吗?
推荐答案
解决了 atmaThank 的 abs()
确实不能直接在 orderBy 中工作,而是作为别名.
Solved atma thank's abs()
realy doesn't work directly in orderBy but as an alias.
解决方案
SELECT field1,field2,abs(field3) AS abs_field3
FROM table
ORDER BY abs_field3 ASC
Obs:这是一个原则限制,而不是 mysql 限制,mysql 支持 abs 直接按部分订购.
Obs: It's a doctrine limitation, not a mysql limitation, mysql suports abs direct on order by part.
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