原理2.1 - DAYOFWEEK函数替代？

Question

在D2.1，querybuilder中，如何使用星期几的mysql函数，我不认为它在

doctrine but isnt there  a way i could otherwise?

$qb->select('p')
   ->where('YEAR(p.postDate) = :year')
   ->andWhere('MONTH(p.postDate) = :month')
   ->andWhere('DAYOFWEEK(p.postDate) = :dayOfWeek');

Answer 1

您可以编写一个原理扩展来完成这项工作：

Xyz\SomeBundle\DoctrineExtension\DayOfWeek.php

class DayOfWeek extends FunctionNode
{
    public $date;

    /**
     * @override
     */
    public function getSql(\Doctrine\ORM\Query\SqlWalker $sqlWalker)
    {
        return "DAYOFWEEK(" . $sqlWalker->walkArithmeticPrimary($this->date) . ")";
    }

    /**
     * @override
     */
    public function parse(\Doctrine\ORM\Query\Parser $parser)
    {
        $parser->match(Lexer::T_IDENTIFIER);
        $parser->match(Lexer::T_OPEN_PARENTHESIS);

        $this->date = $parser->ArithmeticPrimary();

        $parser->match(Lexer::T_CLOSE_PARENTHESIS);
    }
}

app/config/config.yml

doctrine:
    orm:
        auto_generate_proxy_classes: "%kernel.debug%"
        entity_managers:
            default:
                naming_strategy: doctrine.orm.naming_strategy.underscore
                auto_mapping: true
                dql:
                    datetime_functions:
                        dayofweek: Xyz\SomeBundle\DoctrineExtension\DayOfWeek

更多详细信息请查看此处：DoctrineExtensions

Answer 2

无法将所有SQL函数与查询构建器一起使用。其中一些是定义的(AVG、SUM等)，但大多数没有定义(包括DAY/WEEK/MONTH).

您仍然可以编写原生SQL：

// creating doctrines result set mapping obj.
$rsm = new Doctrine\ORM\Query\ResultSetMapping();

// mapping results to the message entity
$rsm->addEntityResult('AppBundle\Entity\Post', 'p');
$rsm->addFieldResult('p', 'id', 'id');
$rsm->addFieldResult('p', 'postDate', 'postDate');

$sql = "SELECT id, postDate
        FROM your_table
        WHERE YEAR(postDate) = ? 
              AND [...]";

$query = $this->_em->createNativeQuery($sql, $rsm);
$query->setParameter(1, $your_year_here);
$query->getResult();