Symfony 2 & Doctrine 2 - create a custom findBy() method - php

Question

I would like create my own method findBy().
I have two entities: Film and Genre. The purpose of this custom findBy() method is :
join the Film entity with the Genre entity, to retrieve all my films
and the associated genres,
keeping the parameters of the basic method which are: $criteria,
$orderBy , $limit and $offset.
Indeed, I use those parameters to make a paging.
Previously I made a custom findAll method with the join between the two entities :
<?php
public function myFindAll()
{
$films = $this->createQueryBuilder('f')
// leftJoin because I need all the genre
->leftJoin('f.genres', 'g')
->addSelect('g.label')
->groupBy('f.id')
->getQuery()
->getArrayResult();
// $genres contains all the genres and the associated movies
return ($films);
}
I don't know how to include the rest of parameters.

Answer 1

How about slice() ?
$genders = $em->getRepository('models\Gender')->findAll()->slice($offset, $lenght);
Also, you can make use of your function like:
public function myFindAll($criteria, $orderBy, $limit, $offset)
{
$films = $this->createQueryBuilder('f')
// leftJoin because I need all the genre
->leftJoin('f.genres', 'g')
->addSelect('g.label')
->groupBy('f.id')
->add('orderBy', "f.{$orderBy} ASC")
->getQuery()
->getArrayResult()
->slice($offset, $limit);
// $films contains all the genres and the associated movies
return ($films);
}
EDIT:
The slice() function acts as pagination function:
$page1 = $films->slice(0, 15); // retrieve films from 0 to 15 position
$page2 = $films->slice(10, 7); // retrieve films from 10 to 17 position
Now, if you want to use some criterias values you can make something like this:
public function myFindAll($criteria, $orderBy, $limit, $offset)
{
$films = $this->createQueryBuilder('f');
foreach($criteria as $column => $value)
$films->where($column, $value);
$films
->leftJoin('f.genres', 'g')
->addSelect('g.label')
->groupBy('f.id')
->add('orderBy', "{$orderBy[0]} {$orderBy[1]}");
->getQuery()
->getArrayResult()
->slice($offset, $limit);
// $genres contains all the genres and the associated movies
return ($films);
}
I am not sure if where function will override the previous conditions, but at least it can lead you to find the correct query
setFirstResult() and setMaxResult()
Also, there is another option that you can use:
public function myFindAll($criteria, $orderBy, $limit, $offset)
{
$films = $this->createQueryBuilder('f');
foreach($criteria as $column => $value)
$films->where($column, $value);
$films
->leftJoin('f.genres', 'g')
->addSelect('g.label')
->groupBy('f.id')
->add('orderBy', "f.{$orderBy[0]} {$orderBy[1]}")
->setFirstResult($offset)
->setMaxResults($limit)
->getQuery()
->getArrayResult();
// $genres contains all the genres and the associated movies
return ($films);
}