Symfony lowest user bid using MIN function? - php

Question

I want to get the lowest bid of the user for each product id.
return $this->getEntityManager()
->createQuery('
SELECT PARTIAL b.{Id, MIN(amount) as amount, currency}, PARTIAL p.{id, firstName, lastName}
FROM AppBundle:Bid b
LEFT JOIN b.provider p
WHERE b.product in (:product)
AND b.status = :status
GROUP BY b.product
ORDER BY b.amount'
)
->setParameter('product', $ids)
->setParameter('status', 'active')
->getResult()
;
I get following error
[Syntax Error] line 0, col 42: Error: Expected
Doctrine\ORM\Query\Lexer::T_CLOSE_CURLY_BRACE, got '('
I have run exactly similar query in SQL, it works fine, but I'm not sure how to achieve same in doctrine query builder.

Answer 1

If you want user mysql function with doctrine query you must be add extension of doctrine mysql function OR you can user native query. I have added native query in follow:
use Doctrine\ORM\Query\ResultSetMapping;
$rsm = new ResultSetMapping();
$rsm->addEntityResult('AppBundle:Bid', 'b');
$rsm->addFieldResult('b', 'Id', 'Id');
$rsm->addFieldResult('b', 'amount', 'amount');
$rsm->addFieldResult('b', 'currency', 'currency');
...
$sqlQuery = "SELECT b.Id, MIN(b.amount), b.currency, p.firstName, p.lastName
FROM AppBundle:Bid b
LEFT JOIN b.AppBundle:Provider p
WHERE b.AppBundle:Product in (:product)
AND b.status = :status
GROUP BY b.product
ORDER BY b.amount";
$query = $em->createNativeQuery($sqlQuery, $rsm)
->setParameter('product', $ids)
->setParameter('status', 'active');
$query->getResult();
Please let me know if any problem with this one

Answer 2

When using the PARTIAL keyword in your DQL query, you can only list properties of the entities you select from (the MIN() function is no property of your entity). You can simply leave out the PARTIAL part and use a query like this (please note that Doctrine will not return objects in your result set but only a flat array, see also http://doctrine-orm.readthedocs.org/projects/doctrine-orm/en/latest/reference/dql-doctrine-query-language.html#partial-object-syntax):
SELECT b.Id, MIN(b.amount) as amount, b.currency as bid, p.id, p.firstName, p.lastName as provider
FROM AppBundle:Bid b
LEFT JOIN b.provider p
WHERE b.product in (:product) AND b.status = :status
GROUP BY b.product
ORDER BY b.amount