Doctrine 2 Multiple select elements, aliases, date_format - php

Question

i'm new with doctrine and want to make a query on my db using it
SELECT DATE_FORMAT(DATE(created_at), '%m-%Y') AS 'date',
COUNT(DISTINCT(id)) AS 'value'
FROM users
GROUP BY YEAR(DATE(created_at)), MONTH(DATE(created_at))
i read some documentation but still have few questions
how to i select multiple elements; give aliases to my selected elements, do a left join. Are WEEK() MONTH() and YEAR() functions avaible ? does DATE_FORMAT (from mysql) is avaible ?
thank you

Answer 1

I believe you should use the query builder (http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/query-builder.html).
Considering date, you can use symfony datetime objects and format them.
For left join the leftJoin method can be used (http://docs.doctrine-project.org/projects/doctrine-dbal/en/latest/reference/query-builder.html)
<?php
// $qb instanceof QueryBuilder
$qb->select('u as aliasName') //see for alias
->from('User', 'u')
->leftJoin('u', 'phonenumbers', 'p', 'u.id = p.user_id') //see for left join
->where('u.id = ?1')
->addwhere(u.date < :date)
->orderBy('u.name', 'ASC')
->setParameter('date', $symfonyDateTime->format('Y-m-d')); //see for date
Instead of QueryBuilder, you can also try DQL (http://symfony.com/doc/current/doctrine.html and http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/dql-doctrine-query-language.html):
$em = $this->getDoctrine()->getManager();
$query = $em->createQuery(
'SELECT p
FROM AppBundle:Product p
WHERE p.price > :price
ORDER BY p.price ASC'
)
->setParameter('price', 19.99);
$products = $query->getResult();

Answer 2

You could install doctrine extensions in order to use functions like:
DATE, MINUTE, HOUR, DAY, WEEK and many more.
Example:
Doctrine Configuration
doctrine:
dbal:
....
orm:
auto_generate_proxy_classes: "%kernel.debug%"
entity_managers:
default:
dql:
datetime_functions:
DATE_FORMAT: DoctrineExtensions\Query\Mysql\DATE_FORMAT
Then you can really easy add alias like this:
DATE_FORMAT(s.createdAt,'%Y-%m-01') as date