所以最近我一直在思考,但由于缺乏doctrine2和symfony查询构建器的开发,我找不到解决这个问题的方法。
我有2张桌子: 目标:id,user_id,target_value ...... 节省:id,goal_id,金额
我需要从目标中进行选择(我的表中的所有信息都来自目标表,除了我需要从每个目标的储蓄表中制作SUM(金额),因此我可以向用户显示他为自己的目标节省了多少钱)
这是MySQL查询:
select
admin_goals.created,
admin_goals.description,
admin_goals.goal_date,
admin_goals.value,
admin_goals.budget_categ,
sum(admin_savings.value)
from admin_goals
inner join admin_savings on admin_savings.goal_id=admin_goals.id
where admin_goals.user_id=1
group by admin_goals.id
它返回我想要的内容,但我不知道如何使用doctrine或query builder实现它,你能告诉我两个方面的例子吗? 我非常感谢!
答案 0 :(得分:2)
我假设您只需要这些字段,而不是您的AdminGoals
实体。在AdminGoalsRepository
上,您可以执行以下操作:
public function getGoalsByUser(User $user)
{
$qb = $this->createQueryBuilder('goal');
$qb->select('SUM(savings.value) AS savings_value')
->addSelect('goal.created')
->addSelect('goal.description')
->addSelect('goal.goalDate')
->addSelect('goal.value')
->addSelect('goal.budgetCat') //is this an entity? it will be just an ID
->join('goal.adminSavings', 'savings', Join::WITH))
->where($qb->expr()->eq('goal.user', ':user'))
->groupBy('goal.id')
->setParameter('user', $user);
return $qb->getQuery()->getScalarResult();
}
请记住,返回对象将是一个行数组,每一行都是一个关联数组,其中的键与上面的映射一样。
在更新问题之后,我将更改我建议的功能,但如果其他人希望看到差异,则会离开上面的示例。
首先,由于这是AdminSavings
和AdminGoals
之间的单向ManyToOne,因此自定义查询应位于AdminSavingsRepository
(不像上面)。此外,由于您需要aggregated field,这将“中断”您的一些数据提取。当您不仅仅是渲染模板时,尽量保持OOP。
public function getSavingsByUser(User $user)
{
$qb = $this->createQueryBuilder('savings');
//now we can use the expr() function
$qb->select('SUM(savings.value) AS savings_value')
->addSelect('goal.created')
->addSelect('goal.description')
->addSelect('goal.goalDate')
->addSelect('goal.value')
->addSelect('goal.budgetCat') //this will be just an ID
->join('savings.goal', 'goal', Join::WITH))
->where($qb->expr()->eq('goal.user', ':user'))
->groupBy('goal.id')
->setParameter('user', $user);
return $qb->getQuery()->getScalarResult();
}
public function FooAction($args)
{
$em = $this->getDoctrine()->getManager();
$user = $this->getUser();
//check if user is User etc depends on your config
...
$savings = $em->getRepository('AcmeBundle:AdminSavings')->getSavingsByUser($user);
foreach($savings as $row) {
$savings = $row['savings_value'];
$goalId = $row['id'];
$goalCreated = $row['created'];
[...]
}
[...]
}
答案 1 :(得分:0)
如果你使用createQuery(),那么你可以这样做:
$dqlStr = <<<"DSQL"
select
admin_goals.created,
admin_goals.description,
admin_goals.goal_date,
admin_goals.value,
admin_goals.budget_categ,
sum(admin_savings.value)
from admin_goals
inner join admin_savings on admin_savings.goal_id=admin_goals.id
where admin_goals.user_id=1
group by admin_goals.id
DSQL;
$em = $this->getDoctrine()->getManager();
$query = $em->createQuery($dqlStr);
$query->getResult();
另一方面,如果您想使用createQueryBuilder(),可以查看以下链接:http://inchoo.net/dev-talk/symfony2-dbal-querybuilder/