[DDC-1494] Query results are overwritten by previous query. Created: 15/Nov/11  Updated: 09/Feb/13

Status: Awaiting Feedback
Project: Doctrine 2 - ORM
Component/s: ORM
Affects Version/s: 2.1.2
Fix Version/s: None
Security Level: All

Type: Bug Priority: Minor
Reporter: J Assignee: Benjamin Eberlei
Resolution: Unresolved Votes: 0
Labels: None
Environment:

PHP 5.3 + MySQL 5.5

Attachments: File DDC1494Test.php    

 Description   

I am running a query that JOINs three tables, with a simple WHERE:

$q = $em->createQuery("

SELECT cat, n, c
FROM Project_Model_NoticeCategory cat
JOIN cat.notices n
JOIN n.chapters c
WHERE
c.id = :chapter_id

");

When I do this:

  $q->setParameter('chapter_id', 1);
  $a = $q->getResult();

  $q->setParameter('chapter_id', 2);
  $b = $q->getResult();

$b always has the wrong results. Running the following code:

  $q->setParameter('chapter_id', 1);
  $a = $q->getResult();

  $q->setParameter('chapter_id', 2);
  $b = $q->getResult();
  $z = $q->getArrayResult();

BUG Results: $b != $z (getArrayResult IS CORRECT, it refreshes the results) Note: $a==$b (which is wrong)

Explanation:

There is a chapter table, this has a many-to-many join to notices (these are meta info
about the chapter – a little like tagging a blog post) the notices are grouped into
categories.

Data model:

/**
 * @Entity
 * @Table(name="chapter")
 */
class Project_Model_Chapter
{
    /**
     * @Id @Column(type="integer")
     * @GeneratedValue(strategy="AUTO")
     */
    private $id;
 
    /** @Column(type="string") */
    private $title;

	/**
	 * @ManyToMany(targetEntity="Project_Model_Notice", mappedBy="chapters")
	 */
	private $notices;
	
	.... /lots of code snipped/ ....
	
}


/**
 * @Entity
 * @Table(name="notice")
 */
class Project_Model_Notice
{
	/**
     * @Id @Column(type="integer")
     * @GeneratedValue(strategy="AUTO")
     */
    private $id;
 
    /** @Column(type="string") */
    private $title;
	
	/**
	 * @ManyToMany(targetEntity="Project_Model_Chapter", inversedBy="notices")
	 * @JoinTable(name="chapter_notice")
	 */
	private $chapters;
	
	/**
	 * @ManyToOne(targetEntity="Project_Model_NoticeCategory", inversedBy="notices")
	 */
	private $notice_category;
	
	.... /lots of code snipped/ ....
	
}

/**
 * @Entity
 * @Table(name="notice_category")
 */
class Project_Model_NoticeCategory
{
    /**
     * @Id @Column(type="integer")
     * @GeneratedValue(strategy="AUTO")
     */
    private $id;
	/** @Column(type="string") */
    private $title;
	
	/**
	 * Bidirectional - One-To-Many (INVERSE SIDE)
	 *
	 * @OneToMany(targetEntity="Project_Model_Notice", mappedBy="notice_category", cascade={"persist", "remove"})
	 */
	private $notices;

	.... /lots of code snipped/ ....
	
}

Data fixtures:

$tools = new \Project_Model_NoticeCategory;
$tools->setTitle('Tools');
		
$spanner = new \Project_Model_Notice;
$spanner->setTitle('spanner');
$tools->addNotice($spanner);
		
$drill = new \Project_Model_Notice;
$drill->setTitle('power drill');
$tools->addNotice($drill);
		
$this->em->persist($tools);
$this->em->flush();

$tools = new \Project_Model_NoticeCategory;
$tools->setTitle('Safety');
		
$gloves = new \Project_Model_Notice;
$gloves->setTitle('gloves');
$tools->addNotice($gloves);
		
$goggles = new \Project_Model_Notice;
$goggles->setTitle('goggles');
$tools->addNotice($goggles);
		
$this->em->persist($tools);
$this->em->flush();

$chapter1 = new \Project_Model_Chapter;
$chapter1->setTitle('Chapter 1');
$this->em->persist($chapter1);

$chapter2 = new \Project_Model_Chapter;
$chapter2->setTitle('Chapter 2');
$this->em->persist($chapter2);

$chapter1->addNotice($spanner);
$chapter1->addNotice($gloves);

$chapter2->addNotice($spanner);
$chapter2->addNotice($gloves);
$chapter2->addNotice($drill);
$chapter2->addNotice($goggles);

// now persist and flush everything

Initial investigation:

I think it has something to do with HINT_REFRESH ? Stepping through:

ObjectHydrator->_hydrateRow
ObjectHydrator->_getEntity

when it requests the Project_Model_Category from the unit of work, it
seems that the second query is simply grabbing the cached results from
the first results. This MUST be wrong as the second query uses a
different query (the ID changes) and all the results are wrong.

 Comments   
Comment by Benjamin Eberlei [ 15/Nov/11 ]

Fixed formatting

Comment by Benjamin Eberlei [ 18/Nov/11 ]

are you using result caching?

Comment by J [ 21/Nov/11 ]

This is part of my bootstrap
,
,

		
$config = new \Doctrine\ORM\Configuration();
		
$cache = new \Doctrine\Common\Cache\ArrayCache;
$config->setMetadataCacheImpl($cache);
$config->setQueryCacheImpl($cache);
		
// driver: schema
$driver = $config->newDefaultAnnotationDriver(
	APPLICATION_PATH . '/models'
);
$config->setMetadataDriverImpl($driver);
Comment by Benjamin Eberlei [ 15/Dec/11 ]

Cannot reproduce it with the script attached. Can you try to modify this to fail or write your own testcase?

Comment by Benjamin Eberlei [ 15/Dec/11 ]

Downgraded

Comment by Alexander [ 09/Feb/13 ]

Please provide extra feedback.

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