Use Limit and Offset in Doctrine2 query - symfony

I'm trying to do the pagination, but there is an error:
[Syntax Error] line 0, col 57: Error: Expected end of string, got 'limit'
I'm not quite sure if this is the right syntax (and logic) to make my query:
public function getFriendsFromTo ($user, $limit, $offset)
{
return $this->getEntityManager()
->createQuery('SELECT f FROM EMMyFriendsBundle:Friend f WHERE f.user='.$user.' limit '.$limit. 'offset' .$offset)
->getResult();
}
Friends and users are related manyToOne and oneToMany, so in the friends table there is a field - user_id.
This is in my controller:
$user = $this->get('security.context')->getToken()->getUser();
$id = $user->getId();
$friends = $user->getFriends();
$result = count($friends)
$FR_PER_PAGE = 7;
$pages = $result/$FR_PER_PAGE;
$em = $this->getDoctrine()->getEntityManager();
$friends = $em->getRepository('EMMyFriendsBundle:Friend')
->getFriendsFromTo($id, $FR_PER_PAGE, $page*$FR_PER_PAGE);
I know that it's stupid and even wrong (especially the third parameter to be $page*$FR_PER_PAGE), but I just wanted to try if the query works, and it didn't.

Nope. Use:
return $this->getEntityManager()
->createQuery('...')
->setMaxResults(5)
->setFirstResult(10)
->getResult();

$towary = $this->getDoctrine()
->getRepository('AcmeStoreBundle:Towar')
->findBy(array(),array(),10,($current-1)*$numItemsPerPage);

You can use findBy 3rd and 4th parameters of method of doctrine repository, which are limit and offset.
Here is the method definition:
findBy(
array $criteria,
array $orderBy = null,
integer|null $limit = null,
integer|null $offset = null
)
Source: http://www.doctrine-project.org/api/orm/2.2/class-Doctrine.ORM.EntityRepository.html

you can also use
$query->getSingleResult();

Doctrine2.6, stumbled upon this old post and tried the DQL way but it did not fit for purpose. So if you want to avoid using DQL because you already have Entities mapped and joined together, you can do paging using matching & Criteria
$criteria = Criteria::create()
->setMaxResults($limit ? $limit : null)
->setFirstResult($offset ? $offset : null)
$result = $em->getRepository('EMMyFriendsBundle:Friend')
->matching($criteria)->toArray();

Related

Symfony4 How to get objects with query builder

(Hi!),
I need to get objects from a query builder, but I collect an array, so I have the following error:
Call to a member function getPropertyName() on array
So I suppose than my request isn't correct, but I don't know how to resolve my problem
public function findByYear($year): array
{
$conn = $this->getEntityManager()->getConnection();
$sql = 'SELECT * FROM rent_release r WHERE YEAR(`date`) = :yearRequested';
$stmt = $conn->prepare($sql);
$stmt->execute(['yearRequested' => $year]);
return $stmt->fetchAll();
}
Waiting for your help, thanks :)
Ok so, according to comments, I used createQueryBuilder and beberlei/doctrineextensions.
here is the DQL:
$qb = $this->createQueryBuilder('rr')
->andWhere('YEAR(rr.date) = :year')
->setParameter('year', $year)
->orderBy('rr.date', 'ASC')
->getQuery();
return $qb->execute();
and in doctrine.yaml I added this:
dql:
string_functions:
YEAR: DoctrineExtensions\Query\Mysql\Year
and now it works well, thanks all !

DQL query ManyToMany IN

This query in not working. What could be wrong? Post has author(User entity). User has Following(ManyToMany self-directing)
I'm trying to get all Posts of the Users which I'm following
$userId = $this->getUser()->getId();
$qb = $em->createQueryBuilder();
$qb2 = $qb;
$qb2 = $em->createQueryBuilder()
->select('u.following')
->from('AppBundle\Entity\User', 'u')
->where('u.id = :userId');
$qb->select('p')
->from('AppBundle\Entity\Post', 'p')
->where($qb->expr()->In('p.author', $qb2->getDQL()));
$qb->setParameter('userId', $userId);
$dql = $qb->getDQL();
I will assume that your code is in repository as it should be...
src/AppBundle/Controller/PostController.php
$em=$this->getDoctrine()->getManager();
$myResultCollection=$em->getRepository(Post::class)->myCustomQuery($this->getUser());
src/AppBundle/Repository/PostRepository.php
public function myCustomQuery(User $user) {
$em=$this->getEntityManager();
$qb=$em->createQueryBuilder();
return $qb->select("p")
->from(Post::class, "p")
->where($qb->expr()->in("p.author",
$qb->select("u.following")
->from(User::class, "u")
->where("u.id=:USERID")
->getDQL()))
->setParameters(array('USERID'=>$user->getId()))
->getQuery()
->execute();
}
As side note, you should be careful with quotes.
Make sure to use double quotes when using DQL (it's true for SQL too).
The reason is because you need simple quote for strings in queries.

Doctrine2 empty parameter on queryBuilder

I am trying to check whether an user email is set or not. I am able to get the ones that are set to NULL but I am missing on the ones that have an empty string as the value. Here is my attempt:
$user = $this->createQueryBuilder('u')
->where('(u.email IS NULL OR u.email = :empty)')
->setParameter('empty', "''")
->getQuery()->getResult()
;
I have no problem getting the NULL emails but I fail to get the empty string emails. Is there any way to accomplish this or is it not supported in DQL?
How about this (EDIT #2):
$user = $this->createQueryBuilder('u')
->where('u.email = NULL')
->orWhere('u.email = \'\'')
->getQuery()->getResult()
;
Does that work?
Worths mention that the Expr Helper from QueryBuilder provides a function for that:
// Example - $qb->expr()->isNull('u.id') => u.id IS NULL
public function isNull($x); // Returns string
So for your case you can do something like:
$qb = $this->createQueryBuilder('u');
$qb
->where(
$qb->expr()->orX(
$qb->expr()->isNull('u.email'),
$qb->expr()->eq('u.email', ':empty'),
)
)
->setParameter('empty', '""');
$users = $qb->getQuery()->getResult();

Doctrine query to search entities based on related entity field

I've ManyToOne relationship in doctrine (Many results to One PollingStation):
/**
* #ORM\ManyToOne(targetEntity="Iballot\CmsBundle\Entity\PollingStation2", inversedBy="results", cascade={"persist"})
* #ORM\JoinColumn(nullable=false)
* #Expose
*/
private $pollingStation2;
I'd like search for all the result that belong to the polling Station that have a name similar to a key word. I try the following method but it does not work:
public function getForSearch($keyWord)
{
$query = $this->_em->createQueryBuilder();
$query
->select('r')
->from('IballotCmsBundle:Result', 'r')
->where($query->expr()->like('p.pollingStation2', $query->expr()->literal('%' . $keyWord . '%')))
//->orderBy('p.', 'ASC')
->getQuery()
->setParameter('keyWord', '%'.$keyWord.'%');
return $query->getQuery()->getResult();
}
I get the following error
[Semantical Error] line 0, col 48 near 'pollingStation2': Error:
Invalid PathExpression. Must be a StateFieldPathExpression.
As said by #Cerad (one more time), you need a JOIN to make the associated entity available while building your query.
Try this :
$query = $this->_em->createQueryBuilder();
$query
->select('r')
->from('IballotCmsBundle:Result', 'r')
->leftJoin('r.pollingStation2', 'p') // The missing join
->where('p.name LIKE :keyword') // where p.name like %keyword%
->setParameter('keyword', '%'.$keyword.'%')
->orderBy('p.name', 'ASC') // order by p.name ASC
->getQuery()
return $query->getResult();
BTW I fixed your orderBy, simplified your where and fixed the keyword parameter that is wrongly defined.
Try putting this method in your Result EntityRepository class:
public function getForSearch($keyWord)
{
$query = $this->createQueryBuilder('r');
$query
->join('r.pollingStation2', 'p')
->where('p.name LIKE :keyword')
->setParameter('keyword', '%' . $keyWord . '%')
//->orderBy('p.', 'ASC')
;
return $query->getQuery()->getResult();
}

'Invalid parameter number: number of bound variables does not match number of tokens' Symfony

I'm working on a symfony project entity with query builder. When I try to run this function I get this issue.
Invalid parameter number: number of bound variables does not match number of tokens
public function json_filterAllproductsAction() {
$search = "";
$category = 1;
//Combine tables and create the query with querybuilder
$em = $this->container->get('doctrine.orm.entity_manager');
$qb = $em->createQueryBuilder();
$qb->select('p')
->from('EagleAdminBundle:Products', 'p')
->orderBy('p.id', 'DESC');
if ($category != 0) {
$qb->where($qb->expr()->in('p.category', '?1'))
->setParameter(1, $category);
}
$qb->where('p.productTitle LIKE :title')
->setParameter('title', "$search%");
//convert to json using "JMSSerializerBundle"
$serializer = $this->container->get('serializer');
$jsonproducts = $serializer->serialize($qb->getQuery()->getResult(), 'json');
return new Response($jsonproducts);
}
I think error is in
$qb->where($qb->expr()->in('p.category', '?1'))
->setParameter(1, $category);
It would be great help someone can help me.
You have two issues here. The first is that your last where clause overwrites the first one. This can be fixed by using andWhere. The second is that your mixing named parameters (:title) with positional parameters (?1). Mixing is a no no. And you don't really need the expr object. Try:
$qb->select('product')
->from('EagleAdminBundle:Products', 'product')
->orderBy('product.id', 'DESC');
if ($category) {
$qb->andWhere('product.category IN (:category)');
$qb->setParameter('category', $category);
}
$qb->andWhere('product.productTitle LIKE :title');
$qb->setParameter('title', "$search%");

Resources