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HasOne.php
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HasOne.php
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<?php
/**
* PHP Version 5.4
*
* 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 CakePHP(tm) v 3.0.0
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
namespace Cake\ORM\Association;
use Cake\Database\Expression\IdentifierExpression;
use Cake\ORM\Association;
use Cake\ORM\Association\DependentDeleteTrait;
use Cake\ORM\Entity;
use Cake\ORM\Query;
use Cake\ORM\Table;
use Cake\Utility\Inflector;
/**
* Represents an 1 - 1 relationship where the source side of the relation is
* related to only one record in the target table and vice versa.
*
* An example of a HasOne association would be User has one Profile.
*/
class HasOne extends Association {
use DependentDeleteTrait;
/**
* Whether this association can be expressed directly in a query join
*
* @var boolean
*/
protected $_canBeJoined = true;
/**
* The type of join to be used when adding the association to a query
*
* @var string
*/
protected $_joinType = 'INNER';
/**
* 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) {
$key = Inflector::singularize($this->source()->alias());
$this->_foreignKey = Inflector::underscore($key) . '_id';
}
return $this->_foreignKey;
}
return parent::foreignKey($key);
}
/**
* 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 $name
* @return string
*/
public function property($name = null) {
if ($name !== null) {
return parent::property($name);
}
if ($name === null && !$this->_propertyName) {
$this->_propertyName = Inflector::underscore(Inflector::singularize($this->_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.
*
* @return boolean
*/
public function isOwningSide(Table $side) {
return $side === $this->source();
}
/**
* Takes an entity from the source table and looks if there is a field
* matching the property name for this association. The found entity will be
* saved on the target table for this association by passing supplied
* `$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 boolean|Entity false if $entity could not be saved, otherwise it returns
* the saved entity
* @see Table::save()
*/
public function save(Entity $entity, $options = []) {
$targetEntity = $entity->get($this->property());
if (empty($targetEntity) || !($targetEntity instanceof Entity)) {
return $entity;
}
$properties = array_combine(
(array)$this->foreignKey(),
$entity->extract((array)$this->source()->primaryKey())
);
$targetEntity->set($properties, ['guard' => false]);
if (!$this->target()->save($targetEntity, $options)) {
$targetEntity->unsetProperty(array_keys($properties));
return 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
*/
protected function _joinCondition(array $options) {
$field = sprintf('%s.%s',
$this->_sourceTable->alias(),
$this->_sourceTable->primaryKey()
);
$value = new IdentifierExpression(sprintf(
'%s.%s', $this->_targetTable->alias(), $options['foreignKey']
));
return [$field => $value];
}
}