How can I use SQL's YEAR(), MONTH() and DAY() in Doctrine2?

问题

I want to perform a query which would look like this in native SQL:

SELECT
    AVG(t.column) AS average_value
FROM
    table t
WHERE
    YEAR(t.timestamp) = 2013 AND
    MONTH(t.timestamp) = 09 AND
    DAY(t.timestamp) = 16 AND
    t.somethingelse LIKE \'somethingelse\'
GROUP BY
    t.somethingelse;

If I am trying to implement this in Doctrine\'s query builder like this:

$qb = $this->getDoctrine()->createQueryBuilder();
$qb->select(\'e.column AS average_value\')
   ->from(\'MyBundle:MyEntity\', \'e\')
   ->where(\'YEAR(e.timestamp) = 2013\')
   ->andWhere(\'MONTH(e.timestamp) = 09\')
   ->andWhere(\'DAY(e.timestamp) = 16\')
   ->andWhere(\'u.somethingelse LIKE somethingelse\')
   ->groupBy(\'somethingelse\');

I get the error exception

[Syntax Error] line 0, col 63: Error: Expected known function, got \'YEAR\'

How can I implement my query with Doctrines query builder?

Notes:

I know about Doctrine\'s Native SQL. I\'ve tried this, but it leads to the problem that my productive and my development database tables have different names. I want to work database agnostic, so this is no option.
Although I want to work db agnostic: FYI, I am using MySQL.
There is way to extend Doctrine to \"learn\" the YEAR() etc. statements, e.g. as seen here. But I am looking for a way to avoid including third party plugins.

回答1:

You can add Doctrine extension so you can use the MySql YEAR and MONTH statement by adding this configuration if you're on Symfony:

doctrine:
    orm:
        dql:
            string_functions:
                MONTH: DoctrineExtensions\Query\Mysql\Month
                YEAR: DoctrineExtensions\Query\Mysql\Year

now you can use the MONTH and YEAR statements in your DQL or querybuilder.

回答2:

In Symfony 4 you must install DoctrineExtensions:

composer require beberlei/DoctrineExtensions

And then edit the doctrine config file (config/packages/doctrine.yaml) as follow:

doctrine:
    orm:
        dql:
            string_functions:
                MONTH: DoctrineExtensions\Query\Mysql\Month
                YEAR: DoctrineExtensions\Query\Mysql\Year

回答3:

orocrm/doctrine-extensions seems to be a good project too

It supports both MySQL and PostgreSql .. the goal is to be cross DB

回答4:

For Symfony 4:

Install: composer require beberlei/doctrineextensions
Edit: config\packages\doctrine.yaml

    doctrine:
        orm:
            dql:
                datetime_functions:
                    DAY: DoctrineExtensions\Query\Mysql\Day
                    MONTH: DoctrineExtensions\Query\Mysql\Month
                    YEAR: DoctrineExtensions\Query\Mysql\Year

Edit your controller:

    public function somex()
    {
        $em = $this->getDoctrine()->getManager();

        $emConfig = $em->getConfiguration();
        $emConfig->addCustomDatetimeFunction('YEAR', 'DoctrineExtensions\Query\Mysql\Year');
        $emConfig->addCustomDatetimeFunction('MONTH', 'DoctrineExtensions\Query\Mysql\Month');
        $emConfig->addCustomDatetimeFunction('DAY', 'DoctrineExtensions\Query\Mysql\Day');

        $day = '22';
        $month = '4';

        $qb = $em->createQueryBuilder()
            ->select('u')
            ->from('App\Entity\User', 'u')
            ->where('DAY(u.somedate) = :day')
            ->andwhere('MONTH(u.somedate) = :month')
            ->setParameter('month', $day)
            ->setParameter('day', $month)
        ;
        $trab = $qb->getQuery()->getResult();


        return $this->render('intranet/somex.html.twig', [
            'trab' => $trab
        ]);
    }
    ````

来源：https://stackoverflow.com/questions/18826836/how-can-i-use-sqls-year-month-and-day-in-doctrine2

标签

mysql