Doctrine 和 Symfony 中的 MySQL 用户定义变量

问题描述

我有以下 Doctrine 声明，效果很好.

I have the following Doctrine statement which works fine.

$query = $this->createQuery('r')
            ->select('u.id, CONCAT(u.first_name, " ", LEFT(u.last_name,1)) as full_name, u.first_name, u.last_name, u.gender, r.run_time')
            ->innerJoin('r.ChallengeUser u')
            ->orderBy('run_time')
            ->execute(array(), Doctrine::HYDRATE_ARRAY_SHALLOW);

我需要在其中添加行数.现在我知道使用原始 SQL 可以做到这一点；

I need to add a row count into this. Now I know with raw SQL you can do this;

SET @rank=0;
SELECT @rank:=@rank+1 as rank, u.id, u.first_name ....etc

所以我的问题是，我怎样才能让它与 Symfony 1.4 和 Doctrine 一起运行?我在这个项目中使用 MySQL.

So my question is, how can I get this to run with Symfony 1.4 and Doctrine? I am using MySQL for this project.

编辑...我想通了..

Edit... I figured it out..

Doctrine_Manager::getInstance()->getCurrentConnection()->standaloneQuery('SET @rank=0;')->execute();

$query = $this->createQuery('r')
            ->select('r.run_time, @rank:=@rank+1 rank, r.user_id, CONCAT(u.first_name, " ", LEFT(u.last_name,1)) as full_name, u.first_name, u.last_name, u.gender')
            ->leftJoin('r.ChallengeUser u')
            ->orderBy('run_time')
            ->execute(array(), Doctrine::HYDRATE_ARRAY_SHALLOW);

添加独立查询以设置变量，并将内连接交换为左连接.

Add the standalone query in to set the variable, and swap the inner join to a left join.

推荐答案

如果你正在使用 MySQL，并且没有预见到切换到其他 DBMS，也许你可以尝试

if you are using MySQL, and no switches to other DBMS are foreseen, maybe you could try

$query = $this->createQuery('r')
            ->select('COUNT(u.id) as rank, u.id, CONCAT(u.first_name, " ", LEFT(u.last_name,1)) as full_name, u.first_name, u.last_name, u.gender, r.run_time')
            ->innerJoin('r.ChallengeUser u')
            ->orderBy('run_time')
            ->execute(array(), Doctrine::HYDRATE_ARRAY);

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