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<?php |
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/* |
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You may not change or alter any portion of this comment or credits |
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of supporting developers from this source code or any supporting source code |
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which is considered copyrighted (c) material of the original comment or credit authors. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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*/ |
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namespace Xoops\Core\Kernel\Model; |
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use Xoops\Core\Kernel\CriteriaElement; |
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use Xoops\Core\Kernel\XoopsModelAbstract; |
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/** |
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* Object joint handler class. |
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* |
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* @category Xoops\Core\Kernel\Model\Joint |
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* @package Xoops\Core\Kernel |
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* @author Taiwen Jiang <[email protected]> |
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* @copyright 2000-2015 XOOPS Project (http://xoops.org) |
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* @license GNU GPL 2 or later (http://www.gnu.org/licenses/gpl-2.0.html) |
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* @link http://xoops.org |
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* @since 2.3.0 |
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* |
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* Usage of methods provided by XoopsModelJoint: |
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* |
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* Step #1: set linked table and joint fields through XoopsPersistableObjectHandler: |
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* $handler->table_link = $handler->db2->prefix("the_linked_table"); |
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* full name of the linked table that is used for the query |
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* $handler->field_link = "the_linked_field"; |
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* name of field in linked table that will be used to link the linked table |
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* with current table |
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* $handler->field_object = "the_object_field"; |
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* name of field in current table that will be used to link the linked table |
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* with current table; linked field name will be used if the field name is |
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* not set |
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* Step #2: fetch data |
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*/ |
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class Joint extends XoopsModelAbstract |
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{ |
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/** |
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* Validate information for the linkage |
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* |
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* @return bool |
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*/ |
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private function validateLinks() |
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{ |
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if (empty($this->handler->table_link) || empty($this->handler->field_link)) { |
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trigger_error("The linked table is not set yet.", E_USER_WARNING); |
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return false; |
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} |
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if (empty($this->handler->field_object)) { |
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$this->handler->field_object = $this->handler->field_link; |
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} |
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return true; |
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} |
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/** |
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* get a list of objects matching a condition joint with another related object |
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* |
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* @param CriteriaElement|null $criteria criteria to match |
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* @param array $fields variables to fetch |
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* @param bool $asObject flag indicating as object, otherwise as array |
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* @param string $field_link field of linked object for JOIN; |
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* deprecated, for backward compatibility only |
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* @param string $field_object field of current object for JOIN; |
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* deprecated, for backward compatibility only |
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* |
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* @return false|array array as requested by $asObject |
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*/ |
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public function getByLink( |
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CriteriaElement $criteria = null, |
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$fields = null, |
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$asObject = true, |
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$field_link = null, |
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$field_object = null |
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) { |
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if (!empty($field_link)) { |
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$this->handler->field_link = $field_link; |
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} |
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if (!empty($field_object)) { |
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$this->handler->field_object = $field_object; |
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} |
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if (!$this->validateLinks()) { |
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return false; |
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} |
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$qb = $this->handler->db2->createXoopsQueryBuilder(); |
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if (is_array($fields) && count($fields)) { |
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if (!in_array("o." . $this->handler->keyName, $fields)) { |
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$fields[] = "o." . $this->handler->keyName; |
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} |
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$first = true; |
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foreach ($fields as $field) { |
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if ($first) { |
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$first = false; |
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$qb->select($field); |
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} else { |
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$qb->addSelect($field); |
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} |
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} |
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} else { |
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$qb ->select('o.*') |
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->addSelect('l.*'); |
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} |
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$qb ->from($this->handler->table, 'o') |
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->leftJoin( |
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'o', |
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$this->handler->table_link, |
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'l', |
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"o.{$this->handler->field_object} = l.{$this->handler->field_link}" |
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); |
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if (isset($criteria) && ($criteria instanceof CriteriaElement)) { |
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$qb = $criteria->renderQb($qb); |
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} |
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$result = $qb->execute(); |
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$ret = array(); |
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if ($asObject) { |
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while ($myrow = $result->fetch(\PDO::FETCH_ASSOC)) { |
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$object = $this->handler->create(false); |
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$object->assignVars($myrow); |
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$ret[$myrow[$this->handler->keyName]] = $object; |
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unset($object); |
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} |
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} else { |
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$object = $this->handler->create(false); |
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while ($myrow = $result->fetch(\PDO::FETCH_ASSOC)) { |
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$object->assignVars($myrow); |
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$ret[$myrow[$this->handler->keyName]] = $object->getValues(); |
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} |
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unset($object); |
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} |
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return $ret; |
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} |
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/** |
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* Count of objects matching a condition |
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* |
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* @param CriteriaElement|null $criteria criteria to match |
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* |
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* @return false|int count of objects |
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*/ |
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public function getCountByLink(CriteriaElement $criteria = null) |
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{ |
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if (!$this->validateLinks()) { |
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return false; |
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} |
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$qb = $this->handler->db2->createXoopsQueryBuilder(); |
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$qb ->select("COUNT(DISTINCT o.{$this->handler->keyName})") |
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->from($this->handler->table, 'o') |
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->leftJoin( |
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'o', |
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$this->handler->table_link, |
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'l', |
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"o.{$this->handler->field_object} = l.{$this->handler->field_link}" |
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); |
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if (isset($criteria) && ($criteria instanceof CriteriaElement)) { |
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$criteria->renderQb($qb); |
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} |
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$result = $qb->execute(); |
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return $result->fetchColumn(0); |
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} |
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/** |
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* array of count of objects matching a condition of, groupby linked object keyname |
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* |
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* @param CriteriaElement $criteria criteria to match |
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* |
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* @return false|int count of objects |
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*/ |
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public function getCountsByLink(CriteriaElement $criteria = null) |
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{ |
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if (!$this->validateLinks()) { |
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return false; |
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} |
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$qb = $this->handler->db2->createXoopsQueryBuilder(); |
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$qb ->select("l.{$this->handler->field_link}") |
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->addSelect('COUNT(*)') |
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->from($this->handler->table, 'o') |
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->leftJoin( |
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'o', |
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$this->handler->table_link, |
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'l', |
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"o.{$this->handler->field_object} = l.{$this->handler->field_link}" |
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); |
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if (isset($criteria) && ($criteria instanceof CriteriaElement)) { |
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$criteria->renderQb($qb); |
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} |
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$qb ->groupBy("l.{$this->handler->field_link}"); |
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$result = $qb->execute(); |
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$ret = array(); |
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while (list($id, $count) = $result->fetch(\PDO::FETCH_NUM)) { |
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$ret[$id] = $count; |
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} |
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return $ret; |
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} |
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/** |
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* update objects matching a condition against linked objects |
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* |
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* @param array $data array of key => value |
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* @param CriteriaElement|null $criteria criteria to match |
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* |
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* @return false|int count of objects |
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* |
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* @todo UPDATE ... LEFT JOIN is not portable |
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* Note Alain91 : multi tables update is not allowed in Doctrine |
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*/ |
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public function updateByLink(array $data, CriteriaElement $criteria = null) |
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{ |
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if (!$this->validateLinks()) { |
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return false; |
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} |
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if (empty($data) || empty($criteria)) { // avoid update all records |
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return false; |
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} |
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$set = array(); |
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foreach ($data as $key => $val) { |
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$set[] = "o.{$key}=" . $this->handler->db2->quote($val); |
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} |
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$sql = " UPDATE {$this->handler->table} AS o" . " SET " . implode(", ", $set) |
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. " LEFT JOIN {$this->handler->table_link} AS l " |
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. "ON o.{$this->handler->field_object} = l.{$this->handler->field_link}"; |
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if (isset($criteria) && ($criteria instanceof CriteriaElement)) { |
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$sql .= " " . $criteria->renderWhere(); |
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} |
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return $this->handler->db2->executeUpdate($sql); |
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} |
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/** |
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* Delete objects matching a condition against linked objects |
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* |
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* @param CriteriaElement|null $criteria criteria to match |
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* |
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* @return false|int count of objects |
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* |
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* @todo DELETE ... LEFT JOIN is not portable |
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* Note Alain91 : multi tables delete is not allowed in Doctrine |
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*/ |
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public function deleteByLink(CriteriaElement $criteria = null) |
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{ |
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if (!$this->validateLinks()) { |
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return false; |
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} |
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if (empty($criteria)) { //avoid delete all records |
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return false; |
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} |
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$sql = "DELETE FROM {$this->handler->table} AS o " |
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. "LEFT JOIN {$this->handler->table_link} AS l " |
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. "ON o.{$this->handler->field_object} = l.{$this->handler->field_link}"; |
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if (isset($criteria) && ($criteria instanceof CriteriaElement)) { |
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$sql .= " " . $criteria->renderWhere(); |
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} |
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return $this->handler->db2->executeUpdate($sql); |
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} |
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} |
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