Doctrine 2 DQL MySQL equivalent to ROUND()?

Question

I know from the documentation at: http://docs.doctrine-project.org/en/2.1/reference/dql-doctrine-query-language.html#dql-functions that there is no ROUND function but is the

Answer 1

You need to implement a custom DQL function for that.

There's some examples in DoctrineExtensions.

You can implement it like following:

walkSimpleArithmeticExpression(
            $this->arithmeticExpression
        ) . ')';
    }

    public function parse(\Doctrine\ORM\Query\Parser $parser)
    {

        $lexer = $parser->getLexer();

        $parser->match(Lexer::T_IDENTIFIER);
        $parser->match(Lexer::T_OPEN_PARENTHESIS);

        $this->arithmeticExpression = $parser->SimpleArithmeticExpression();

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

You can then register it in the configuration while bootstrapping the ORM:

$config = new \Doctrine\ORM\Configuration();

$config->addCustomNumericFunction('ROUND', 'MyApp\DQL\Round');