I have an entity called Cycle, with a OneToMany association to CycleActeur (see code below).
I'd like to be able to fetch all Cycle objets in database with no CycleActeur objects associated, using a simple doctrine findBy* method from my controller.
That is to say something like this :
$manager = $this->getContainer()->get('doctrine.orm.entity_manager');
$cycleManager = $manager->getRepository('ESI67Zen2Bundle:Cycle');
$cyclesWithNoCycleActeur = $cycleManager->findBy('acteurs', null);
Is there a way to do this without having to write a specific method in the CycleRepository ?
Extract from the Cycle class code
class Cycle {
/**
* #ORM\OneToMany(
* targetEntity="CycleActeur",
* mappedBy="cycle",
* orphanRemoval=true)
*/
private $acteurs;
}
Extract from the Cycle class code
class CycleActeur {
/**
* #var Cycle Le cycle concerné
*
* #ORM\ManyToOne(targetEntity="Cycle", inversedBy="acteurs")
* #ORM\JoinColumn(name="cycle_id", referencedColumnName="id")
*
*/
private $cycle;
}
Your Cycle entity is the inverse side of relationship and it's table in database has no 'acteurs' column, so you cannot use findBy(['acteurs'=>null]) or findByActeurs(null). But you can do something anyway:
$manager = $this->getContainer()->get('doctrine.orm.entity_manager');
$cycleManager = $manager->getRepository('ESI67Zen2Bundle:Cycle');
$allCycles = $cycleManager->findAll();
$cyclesWithNoCycleActeur = [];
foreach($allCycles as $cycle)
{
if($cycle->getActeurs()->isEmpty())
{
$cyclesWithNoCycleActeur[] = $cycle;
}
}
In this case (to my mind) the best way is to use DQL's condition IS EMPTY:
$manager
->createQueryBuilder()
->from(Cycle::class, 'cycle')
->select('cycle')
->andWhere('cycle.acteurs IS EMPTY')
->getQuery()
->getResult()
;
You can use this code in the EntityRepository or anywhere you have access to the EntityManager.
Source: Doctrine documentation.
There's a DQL function SIZE(), which according to Doctrine documentation:
SIZE(collection) - Return the number of elements in the specified collection
So you can use it as a condition like:
SIZE(acteurs) = 0
I'm not sure if it will work with a findBy method, but I would recommend to create a custom method in ESI67Zen2Bundle:Cycle's repository, to make it explicit what the code is doing. Its will work both for DQL Query and Query Builder.
$cyclesWithNoCycleActeur = $cycleManager->findBy(array('SIZE(acteurs)' => 0));
My 2 cents
Good morning, as seen in the image below, I have some tables linked.
Using Doctrine (in Symfony2) I'm trying to get an array of Objects Issue which itself contains all IssueMessages and IssueStatusChanged objects but can not.
I have no idea how I can do to join two tables (IssueMessage and IssueStatusChanged) to through their identifiers.
The most we've done is get all Issue with an account of the messages that have:
$dql = 'SELECT x, COUNT(im.id) FROM PanelBundle:Issue x LEFT JOIN PanelBundle:IssueMessages im WITH x.id = im.idIssue';
Does anyone could give me a hand?
THANKS!
You want to use assication mapping; this will have Doctrine manage all the joins for you.
Once in place, $issue will always have the other associated models available automatically without you having to worry about joins.
For the example below (assuming you use annotation), to get messages for an issue just get the issue objects and then use $issue->getMessages();.
<?php
/** #Entity */
class issue
{
/**
* #ORM\Id
* #ORM\GeneratedValue
* #ORM\Column(type="integer")
*/
private $id;
// ...
/**
* #OneToMany(targetEntity="issueMessages", mappedBy="issue")
*/
private $messages;
// ...
public function __construct()
{
$this->messages = new Doctrine\Common\Collections\ArrayCollection();
}
}
/** #Entity */
class issueMessages
{
// ...
/**
* #ManyToOne(targetEntity="issue", inversedBy="messages")
* #JoinColumn(name="issue_id", referencedColumnName="id")
*/
private $issue;
// ...
}
If you using yml format for schema orm files than
first you need to write schema and mention oneToMany, manyToOne relationship with table fields & generate entity, repository class.
Than you can use join with two or more tables as below example:
Example of repository class file function:
----------------------------------------------------
public function getReportInfo($idUserDetail)
{
$query = $this->createQueryBuilder('UR')
->select("UR.report_period_start_date, UR.report_period_end_date")
->leftJoin('UR.UserReportDetail', 'URD')
->andWhere('UR.id_user_detail = :id')
->setParameter('id', $id)
->orderBy('UR.report_year', 'DESC')
->addOrderBy('UR.report_month', 'DESC')
->setMaxResults(1);
$resultArray = $query->getQuery()->getArrayResult();
return $resultArray;
}
You can call this function from controller action as below:
-------------------------------------------------------------
public function getUserDetailAction($idUserDetail)
{
$em = $this->getDoctrine()->getManager();
$userDetail = $em->getRepository(
'DemoBundle:UserDetail')
->getReportInfo($idUserDetail);
return $userDetail;
}
I hope this would be useful to you.
I think the problem reside in the DQL syntax (+ missing inverse relation?).
By writing this:
SELECT x, COUNT(im.id) FROM PanelBundle:Issue x
LEFT JOIN PanelBundle:IssueMessages im WITH x.id = im.idIssue
you are joining two "random" table based on the condition provided in the WITH clause. This should usually be ok, but it may confuse the Hydrator component.
In your case you should configure the OneToMany side of the relation in Issue entity, then write something like this:
SELECT x, COUNT(im.id) FROM PanelBundle:Issue x
LEFT JOIN x.issueMessages im
Hope it helps!
I'm trying to make topic / comment system with symfony and I have some question about doctrine's querybuilder.
if I have two entities connected:
/**
* #ORM\ManyToOne(targetEntity="Topicit", inversedBy="comments")
* #ORM\JoinColumn(name="topic_id", referencedColumnName="id")
*/
protected $topicit;
and
/**
* #ORM\OneToMany(targetEntity="Comment", mappedBy="topicit")
*/
protected $comments;
Currently I have builder (getting every column):
$repository = $this -> getDoctrine() -> getRepository('FTFairyBundle:Comment');
$query = $repository->createQueryBuilder('p')
->orderBy('p.topicit', 'ASC')
->getQuery();
$comment = $query ->getResult();
How I make it get only wanted topic_id? Like if I open page with id #1 I wanna get comments connected to that id.
Thanks for your time
You don't need to use query builder for that kind of tasks, you can simply use a getter in your Topicit entity (that of course you need to retrieve from DB)
Something like ->getComments() *(of course that method needs to be defined in Topic class)
Doctrine will take care of load only "consistent" data from your Topic object
Method definition
public getComments()
{
return $this->comments;
}
If you want to query directly you can modify your code as follows
$topicit_id = ... //code to retrieve topicit_id
$repository = $this->getDoctrine()-> getRepository('FTFairyBundle:Comment');
$query = $repository->createQueryBuilder('p')
->where('p.topicit = :topicit_id')
->setParameter('topicit_id', $topicit_id)
->orderBy('p.topicit', 'ASC')
->getQuery();
$comment = $query ->getResult();
I created a database on phpMyAdmin localhost. I have set database configurations in symfony and created doctrine mapper (entity). Now all I need is to make SELECT query and get information from database:
TABLE NAME: Profile
ROWS: 1
CONTROLLER CODE:
...
use Ignas\IgnasBundle\Entity\Profilis;
use Symfony\Component\HttpFoundation\Response;
class DefaultController extends Controller
{
public function indexAction()
{
$profilis = new Profilis();
return new Response('Id '.$profilis->getId());
}
}
getId method is from Entity/Profilis file Profilis class.
Is there any easy way to do this? I searched for a while and all I could find was doctrine syntax that is not familliar to me at all.
you can do it in different ways:
first of all, get the EntityManager in your Controller
$em = $this->getDoctrine()->getEntityManager();
in case it says it's deprecated you can also get it like:
$em = $this->getDoctrine()->getManager();
then you can do it with the QueryBuilder or with the createQuery method
With Select method (as suggested in the comments)
$profilis= $em->select('p.id')
->from('BundleName:EntityName', 'p')
->getQuery()
->getResult();
simple Query:
$query = $em->createQuery("SELECT * FROM Profilis p");
$profilis = $query->getResult();
NOTE
both methods return an array of Profilis so you can simply loop them this way:
foreach($profilis as $p){
// do whatever you want
}
Here is how I query my database for some words
$query = $qb->select('w')
->from('DbEntities\Entity\Word', 'w')
->where('w.indictionary = 0 AND w.frequency > 3')
->orderBy('w.frequency', 'DESC')
->getQuery()
->setMaxResults(100);
I'm using mysql and I'd like to get random rows that match the criteria, I would use order by rand() in my query.
I found this similar question which basically suggests since ORDER BY RAND is not supported in doctrine, you can randomize the primary key instead. However, this can't be done in my case because I have a search criteria and a where clause so that not every primary key will satisfy that condition.
I also found a code snippet that suggests you use the OFFSET to randomize the rows like this:
$userCount = Doctrine::getTable('User')
->createQuery()
->select('count(*)')
->fetchOne(array(), Doctrine::HYDRATE_NONE);
$user = Doctrine::getTable('User')
->createQuery()
->limit(1)
->offset(rand(0, $userCount[0] - 1))
->fetchOne();
I'm a little confused as to whether this will help me work around the lack of support for order by random in my case or not. I was not able to add offset after setMaxResult.
Any idea how this can be accomplished?
The Doctrine team is not willing to implement this feature.
There are several solutions to your problem, each having its own drawbacks:
Add a custom numeric function: see this DQL RAND() function
(might be slow if you have lots of matching rows)
Use a native query
(I personally try to avoid this solution, which I found hard to maintain)
Issue a raw SQL query first to get some IDs randomly, then use the DQL WHERE x.id IN(?) to load the associated objects, by passing the array of IDs as a parameter.
This solution involves two separate queries, but might give better performance than the first solution (other raw SQL techniques than ORDER BY RAND() exist, I won't detail them here, you'll find some good resources on this website).
Follow these steps:
Define a new class at your project as:
namespace My\Custom\Doctrine2\Function;
use Doctrine\ORM\Query\Lexer;
class Rand extends \Doctrine\ORM\Query\AST\Functions\FunctionNode
{
public function parse(\Doctrine\ORM\Query\Parser $parser)
{
$parser->match(Lexer::T_IDENTIFIER);
$parser->match(Lexer::T_OPEN_PARENTHESIS);
$parser->match(Lexer::T_CLOSE_PARENTHESIS);
}
public function getSql(\Doctrine\ORM\Query\SqlWalker $sqlWalker)
{
return 'RAND()';
}
}
Register the class config.yml:
doctrine:
orm:
dql:
numeric_functions:
Rand: My\Custom\Doctrine2\Function\Rand
Use it directly as:
$qb->addSelect('RAND() as HIDDEN rand')->orderBy('rand()'); //Missing curly brackets
In line with what Hassan Magdy Saad suggested, you can use the popular DoctrineExtensions library:
See mysql implementation here: https://github.com/beberlei/DoctrineExtensions/blob/master/src/Query/Mysql/Rand.php
# config.yml
doctrine:
orm:
dql:
numeric_functions:
rand: DoctrineExtensions\Query\Mysql\Rand
Tested in Doctrine ORM 2.6.x-dev, you can then actually do:
->orderBy('RAND()')
Or you could do this -->
$words = $em->getRepository('Entity\Word')->findAll();
shuffle($words);
Of course this would be very inefficient if you have many records so use with caution.
Why not to use repository?
<?php
namespace Project\ProductsBundle\Entity;
use Doctrine\ORM;
class ProductRepository extends ORM\EntityRepository
{
/**
* #param int $amount
* #return Product[]
*/
public function getRandomProducts($amount = 7)
{
return $this->getRandomProductsNativeQuery($amount)->getResult();
}
/**
* #param int $amount
* #return ORM\NativeQuery
*/
public function getRandomProductsNativeQuery($amount = 7)
{
# set entity name
$table = $this->getClassMetadata()
->getTableName();
# create rsm object
$rsm = new ORM\Query\ResultSetMapping();
$rsm->addEntityResult($this->getEntityName(), 'p');
$rsm->addFieldResult('p', 'id', 'id');
# make query
return $this->getEntityManager()->createNativeQuery("
SELECT p.id FROM {$table} p ORDER BY RAND() LIMIT 0, {$amount}
", $rsm);
}
}
For me, the most useful way was to create two arrays where i say order type and different properties of the Entity. For example:
$order = array_rand(array(
'DESC' => 'DESC',
'ASC' => 'ASC'
));
$column = array_rand(array(
'w.id' => 'w.id',
'w.date' => 'w.date',
'w.name' => 'w.name'
));
You could add more entries to array $column like criteria.
Afterwards, you can build your query with Doctrine adding $column and $order inside ->orderBy. For example:
$query = $qb->select('w')
->from('DbEntities\Entity\Word', 'w')
->where('w.indictionary = 0 AND w.frequency > 3')
->orderBy($column, $order)
->getQuery()
->setMaxResults(100);
This way improved the performance of my application. I hope this helps someone.
Shuffling can be done on the query (array) result, but shuffling does not pick randomly.
In order to pick randomly from an entity I prefer to do this in PHP, which might slow the random picking, but it allows me to keep control of testing what I am doing and makes eventual debugging easier.
The example below puts all IDs from the entity into an array, which I can then use to "random-treat" in php.
public function getRandomArt($nbSlotsOnPage)
{
$qbList=$this->createQueryBuilder('a');
// get all the relevant id's from the entity
$qbList ->select('a.id')
->where('a.publicate=true')
;
// $list is not a simple list of values, but an nested associative array
$list=$qbList->getQuery()->getScalarResult();
// get rid of the nested array from ScalarResult
$rawlist=array();
foreach ($list as $keyword=>$value)
{
// entity id's have to figure as keyword as array_rand() will pick only keywords - not values
$id=$value['id'];
$rawlist[$id]=null;
}
$total=min($nbSlotsOnPage,count($rawlist));
// pick only a few (i.e.$total)
$keylist=array_rand($rawlist,$total);
$qb=$this->createQueryBuilder('aw');
foreach ($keylist as $keyword=>$value)
{
$qb ->setParameter('keyword'.$keyword,$value)
->orWhere('aw.id = :keyword'.$keyword)
;
}
$result=$qb->getQuery()->getResult();
// if mixing the results is also required (could also be done by orderby rand();
shuffle($result);
return $result;
}
#Krzysztof's solution is IMHO best here, but RAND() is very slow on large queries, so i updated #Krysztof's solution to gives less "random" results, but they are still random enough. Inspired by this answer https://stackoverflow.com/a/4329492/839434.
namespace Project\ProductsBundle\Entity;
use Doctrine\ORM;
class ProductRepository extends ORM\EntityRepository
{
/**
* #param int $amount
* #return Product[]
*/
public function getRandomProducts($amount = 7)
{
return $this->getRandomProductsNativeQuery($amount)->getResult();
}
/**
* #param int $amount
* #return ORM\NativeQuery
*/
public function getRandomProductsNativeQuery($amount = 7)
{
# set entity name
$table = $this->getClassMetadata()
->getTableName();
# create rsm object
$rsm = new ORM\Query\ResultSetMapping();
$rsm->addEntityResult($this->getEntityName(), 'p');
$rsm->addFieldResult('p', 'id', 'id');
# sql query
$sql = "
SELECT * FROM {$table}
WHERE id >= FLOOR(1 + RAND()*(
SELECT MAX(id) FROM {$table})
)
LIMIT ?
";
# make query
return $this->getEntityManager()
->createNativeQuery($sql, $rsm)
->setParameter(1, $amount);
}
}
I hope this would help others:
$limit = $editForm->get('numberOfQuestions')->getData();
$sql = "Select * from question order by RAND() limit $limit";
$statement = $em->getConnection()->prepare($sql);
$statement->execute();
$questions = $statement->fetchAll();
Note here the table question is an AppBundle:Question Entity. Change the details accordingly. The number of questions is taken from the edit form, make sure to check the variable for the form builder and use accordingly.
First get the MAX value from DB table & then use this as offset in PHP i.e
$offset = mt_rand(1, $maxId)
I know this is an old question. But I used the following solution to get the random row.
Using an EntityRepository method:
public function findOneRandom()
{
$id_limits = $this->createQueryBuilder('entity')
->select('MIN(entity.id)', 'MAX(entity.id)')
->getQuery()
->getOneOrNullResult();
$random_possible_id = rand($id_limits[1], $id_limits[2]);
return $this->createQueryBuilder('entity')
->where('entity.id >= :random_id')
->setParameter('random_id', $random_possible_id)
->setMaxResults(1)
->getQuery()
->getOneOrNullResult();
}
Probably the easiest (but not necessarily the smartest) way to get a single object result ASAP would be implementing this in your Repository class:
public function findOneRandom()
{
$className = $this->getClassMetadata()->getName();
$counter = (int) $this->getEntityManager()->createQuery("SELECT COUNT(c) FROM {$className} c")->getSingleScalarResult();
return $this->getEntityManager()
->createQuery("SELECT ent FROM {$className} ent ORDER BY ent.id ASC")
->setMaxResults(1)
->setFirstResult(mt_rand(0, $counter - 1))
->getSingleResult()
;
}
Just add the following:
->orderBy('RAND()')