/
BelongsTo.php
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/
BelongsTo.php
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<?php
/**
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @since 3.0.0
* @license http://www.opensource.org/licenses/mit-license.php MIT License
*/
namespace Cake\ORM\Association;
use Cake\Database\Expression\IdentifierExpression;
use Cake\ORM\Association;
use Cake\ORM\Association\SelectableAssociationTrait;
use Cake\ORM\Entity;
use Cake\ORM\Table;
use Cake\Utility\Inflector;
/**
* Represents an 1 - N relationship where the source side of the relation is
* related to only one record in the target table.
*
* An example of a BelongsTo association would be Article belongs to Author.
*/
class BelongsTo extends Association {
use SelectableAssociationTrait;
/**
* Sets the name of the field representing the foreign key to the target table.
* If no parameters are passed current field is returned
*
* @param string $key the key to be used to link both tables together
* @return string
*/
public function foreignKey($key = null) {
if ($key === null) {
if ($this->_foreignKey === null) {
$this->_foreignKey = $this->_modelKey($this->target()->alias());
}
return $this->_foreignKey;
}
return parent::foreignKey($key);
}
/**
* Handle cascading deletes.
*
* BelongsTo associations are never cleared in a cascading delete scenario.
*
* @param \Cake\ORM\Entity $entity The entity that started the cascaded delete.
* @param array $options The options for the original delete.
* @return bool Success.
*/
public function cascadeDelete(Entity $entity, array $options = []) {
return true;
}
/**
* Sets the property name that should be filled with data from the target table
* in the source table record.
* If no arguments are passed, currently configured type is returned.
*
* @param string $name The property name, use null to read the current property.
* @return string
*/
public function property($name = null) {
if ($name !== null) {
return parent::property($name);
}
if ($name === null && !$this->_propertyName) {
list(, $name) = pluginSplit($this->_name);
$this->_propertyName = Inflector::underscore(Inflector::singularize($name));
}
return $this->_propertyName;
}
/**
* Returns whether or not the passed table is the owning side for this
* association. This means that rows in the 'target' table would miss important
* or required information if the row in 'source' did not exist.
*
* @param \Cake\ORM\Table $side The potential Table with ownership
* @return bool
*/
public function isOwningSide(Table $side) {
return $side === $this->target();
}
/**
* Get the relationship type.
*
* @return string
*/
public function type() {
return self::MANY_TO_ONE;
}
/**
* Takes an entity from the source table and looks if there is a field
* matching the property name for this association. The found entity will be
* saved on the target table for this association by passing supplied
* `$options`
*
* @param \Cake\ORM\Entity $entity an entity from the source table
* @param array|\ArrayObject $options options to be passed to the save method in
* the target table
* @return bool|Entity false if $entity could not be saved, otherwise it returns
* the saved entity
* @see Table::save()
*/
public function saveAssociated(Entity $entity, array $options = []) {
$targetEntity = $entity->get($this->property());
if (empty($targetEntity) || !($targetEntity instanceof Entity)) {
return $entity;
}
$table = $this->target();
$targetEntity = $table->save($targetEntity, $options);
if (!$targetEntity) {
return false;
}
$properties = array_combine(
(array)$this->foreignKey(),
$targetEntity->extract((array)$table->primaryKey())
);
$entity->set($properties, ['guard' => false]);
return $entity;
}
/**
* Returns a single or multiple conditions to be appended to the generated join
* clause for getting the results on the target table.
*
* @param array $options list of options passed to attachTo method
* @return array
* @throws \RuntimeException if the number of columns in the foreignKey do not
* match the number of columns in the target table primaryKey
*/
protected function _joinCondition($options) {
$conditions = [];
$tAlias = $this->target()->alias();
$sAlias = $this->_sourceTable->alias();
$foreignKey = (array)$options['foreignKey'];
$primaryKey = (array)$this->_targetTable->primaryKey();
if (count($foreignKey) !== count($primaryKey)) {
$msg = 'Cannot match provided foreignKey for "%s", got "(%s)" but expected foreign key for "(%s)"';
throw new \RuntimeException(sprintf(
$msg,
$this->_name,
implode(', ', $foreignKey),
implode(', ', $primaryKey)
));
}
foreach ($foreignKey as $k => $f) {
$field = sprintf('%s.%s', $tAlias, $primaryKey[$k]);
$value = new IdentifierExpression(sprintf('%s.%s', $sAlias, $f));
$conditions[$field] = $value;
}
return $conditions;
}
/**
* {@inheritDoc}
*/
protected function _linkField($options) {
$links = [];
$name = $this->alias();
foreach ((array)$this->target()->primaryKey() as $key) {
$links[] = sprintf('%s.%s', $name, $key);
}
if (count($links) === 1) {
return $links[0];
}
return $links;
}
/**
* {@inheritDoc}
*/
protected function _buildResultMap($fetchQuery, $options) {
$resultMap = [];
$key = (array)$this->target()->primaryKey();
foreach ($fetchQuery->all() as $result) {
$values = [];
foreach ($key as $k) {
$values[] = $result[$k];
}
$resultMap[implode(';', $values)] = $result;
}
return $resultMap;
}
}