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doctrine2/lib/Doctrine/Relation/Association.php

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<?php
/*
* $Id$
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.phpdoctrine.com>.
*/
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Doctrine::autoload('Doctrine_Relation');
/**
* Doctrine_Relation_Association this class takes care of association mapping
* (= many-to-many relationships, where the relationship is handled with an additional relational table
* which holds 2 foreign keys)
*
*
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* @package Doctrine
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @category Object Relational Mapping
* @link www.phpdoctrine.com
* @since 1.0
* @version $Revision$
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
*/
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class Doctrine_Relation_Association extends Doctrine_Relation
{
/**
* @return Doctrine_Table
*/
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public function getAssociationFactory()
{
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return $this->definition['assocTable'];
}
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public function getAssociationTable()
{
return $this->definition['assocTable'];
}
/**
* processDiff
*
* @param Doctrine_Record $record
* @param Doctrine_Connection $conn
*/
public function processDiff(Doctrine_Record $record, $conn = null)
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{
if (!$conn) {
$conn = $this->getTable()->getConnection();
}
$asf = $this->getAssociationFactory();
$alias = $this->getAlias();
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if ($record->hasReference($alias)) {
$new = $record->obtainReference($alias);
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if ( ! $record->obtainOriginals($alias)) {
$record->loadReference($alias);
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}
$operations = Doctrine_Relation::getDeleteOperations($record->obtainOriginals($alias), $new);
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foreach ($operations as $r) {
$query = 'DELETE FROM ' . $asf->getTableName()
. ' WHERE ' . $this->getForeign() . ' = ?'
. ' AND ' . $this->getLocal() . ' = ?';
$conn->execute($query, array($r->getIncremented(),$record->getIncremented()));
}
$operations = Doctrine_Relation::getInsertOperations($record->obtainOriginals($alias),$new);
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foreach ($operations as $r) {
$reldao = $asf->create();
$reldao->set($this->getForeign(), $r);
$reldao->set($this->getLocal(), $record);
$reldao->save($conn);
}
$record->assignOriginals($alias, clone $record->get($alias));
}
}
/**
* getRelationDql
*
* @param integer $count
* @return string
*/
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public function getRelationDql($count, $context = 'record')
{
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$component = $this->definition['assocTable']->getComponentName();
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switch ($context) {
case "record":
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$sub = 'SQL:SELECT ' . $this->definition['foreign'].
' FROM ' . $this->definition['assocTable']->getTableName().
' WHERE ' . $this->definition['local'] .
' IN (' . substr(str_repeat("?, ", $count),0,-2) .
')';
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$dql = 'FROM ' . $this->getTable()->getComponentName();
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$dql .= '.' . $component;
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$dql .= ' WHERE ' . $this->getTable()->getComponentName()
. '.' . $this->getTable()->getIdentifier() . ' IN (' . $sub . ')';
break;
case "collection":
$sub = substr(str_repeat("?, ", $count),0,-2);
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$dql = 'FROM ' . $component . '.' . $this->getTable()->getComponentName();
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$dql .= ' WHERE ' . $component . '.' . $this->definition['local'] . ' IN (' . $sub . ')';
break;
}
return $dql;
}
/**
* fetchRelatedFor
*
* fetches a component related to given record
*
* @param Doctrine_Record $record
* @return Doctrine_Record|Doctrine_Collection
*/
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public function fetchRelatedFor(Doctrine_Record $record)
{
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$id = $record->getIncremented();
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if (empty($id)) {
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$coll = new Doctrine_Collection($this->getTable());
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} else {
$coll = Doctrine_Query::create()->parseQuery($this->getRelationDql(1))->execute(array($id));
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}
return $coll;
}
}