how to use CONVERT() function MySQL in Doctrine - php

Question

I have a field in an entity in string type, I need order result in my dql to value integer
I have a field in an entity in string type, I need the result sorted by that field but converted in an integer.
Some like this (MySQL Query):
SELECT * FROM table1 ORDER BY CONVERT(code, UNSIGNED);
How do I create this query in doctrine?
UPDATE
I managed to do it with the cast function thanks to this post:
CASTING attributes for Ordering on a Doctrine2 DQL Query
I have created my own function to implement this feature.
Official doc in doctrine:
http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/dql-doctrine-query-language.html#adding-your-own-functions-to-the-dql-language

Answer 1

AFAIK You can't do it directly . Doctrine don't support native mysql functions (convert ,day,month etc).
Idea od doctrine is to be able to talk with many different databases - and it's why there isn't any native functions.
but
you can do it on your own.
Some years ago i needed data functions (day/month etc ) in doctrine so i manage to add it do doctrine .
look here :
https://github.com/poznet/SF2Core/blob/master/src/Poznet/CoreBundle/Dql/Year.php
or
https://github.com/beberlei/DoctrineExtensions
seen solutions for conver too , but never tested it , look here
https://gist.github.com/liverbool/6345800

Answer 2

<?php
class ConvertUsing extends FunctionNode
{
public $field;
public $using;
public $charset;
/**
* #override
*/
public function getSql(\Doctrine\ORM\Query\SqlWalker $sqlWalker)
{
return sprintf('CONVERT(%s USING %s)',
$sqlWalker->walkArithmeticPrimary($this->field),
//$sqlWalker->walkSimpleArithmeticExpression($this->using), // or remove USING and uncomment this
$sqlWalker->walkSimpleArithmeticExpression($this->charset)
);
}
/**
* #override
*/
public function parse(\Doctrine\ORM\Query\Parser $parser)
{
$parser->match(Lexer::T_IDENTIFIER);
$parser->match(Lexer::T_OPEN_PARENTHESIS);
$this->field = $parser->ArithmeticPrimary();
// adopt use bypass validate variable of parse by using AliasResultVariable ...!!
$this->using = $parser->AliasResultVariable();
$this->charset = $parser->AliasResultVariable();
$parser->match(Lexer::T_CLOSE_PARENTHESIS);
}
}

Answer 3

If you only want to sort your query you can sort the code even if it's a string like this.
SELECT * FROM table1 ORDER BY code ASC; <- for ascending
SELECT * FROM table1 ORDER BY code DESC; <- for descending
If you want to convert it to integer try this
SELECT * FROM table1 ORDER BY (SELECT CONVERT(int, code));
Just make sure your codes are all numbers so you will not get an error.
I hope it helps.