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<?php |
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/** |
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* @copyright Copyright (c) 2017 René Gieling <[email protected]> |
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* |
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* @author René Gieling <[email protected]> |
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* |
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* @license GNU AGPL version 3 or any later version |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License as |
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* published by the Free Software Foundation, either version 3 of the |
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* License, or (at your option) any later version. |
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* |
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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. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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*/ |
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namespace OCA\Polls\Migration; |
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use OCP\DB\ISchemaWrapper; |
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use OCP\DB\QueryBuilder\IQueryBuilder; |
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use OCP\IConfig; |
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use OCP\IDBConnection; |
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use OCP\Migration\SimpleMigrationStep; |
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use OCP\Migration\IOutput; |
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/** |
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* Installation class for the polls app. |
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* Initial db creation |
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*/ |
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class Version0104Date20200205104800 extends SimpleMigrationStep { |
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/** @var IDBConnection */ |
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protected $connection; |
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/** @var IConfig */ |
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protected $config; |
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/** @var array */ |
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protected $childTables = [ |
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'polls_comments', |
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'polls_log', |
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'polls_notif', |
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'polls_options', |
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'polls_share', |
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'polls_votes', |
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]; |
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/** |
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* @param IDBConnection $connection |
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* @param IConfig $config |
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*/ |
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public function __construct(IDBConnection $connection, IConfig $config) { |
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$this->connection = $connection; |
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$this->config = $config; |
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} |
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/** |
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* @param IOutput $output |
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* @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper` |
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* @param array $options |
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* @return null |
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* @since 13.0.0 |
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*/ |
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public function preSchemaChange(IOutput $output, \Closure $schemaClosure, array $options) { |
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// delete all orphaned entries by selecting all rows |
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// those poll_ids are not present in the polls table |
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// |
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// we have to use a raw query, because NOT EXISTS is not |
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// part of doctrine's expression builder |
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// |
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// get table prefix, as we are running a raw query |
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$prefix = $this->config->getSystemValue('dbtableprefix', 'oc_'); |
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// check for orphaned entries in all tables referencing |
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// the main polls table |
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foreach($this->childTables as $tbl) { |
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$child = "$prefix$tbl"; |
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$query = "DELETE |
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FROM $child |
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WHERE NOT EXISTS ( |
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SELECT NULL |
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FROM {$prefix}polls_polls polls |
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WHERE polls.id = {$child}.poll_id |
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)"; |
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$stmt = $this->connection->prepare($query); |
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$stmt->execute(); |
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} |
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} |
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/** |
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* @param IOutput $output |
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* @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper` |
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* @param array $options |
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* @return null|ISchemaWrapper |
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* @since 13.0.0 |
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*/ |
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public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) { |
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// add an on delete fk contraint to all tables referencing the main polls table |
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/** @var ISchemaWrapper $schema */ |
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$schema = $schemaClosure(); |
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$eventTable = $schema->getTable('polls_polls'); |
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foreach($this->childTables as $tbl) { |
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$table = $schema->getTable($tbl); |
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$table->addForeignKeyConstraint($eventTable, ['poll_id'], ['id'], ['onDelete' => 'CASCADE']); |
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} |
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return $schema; |
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} |
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} |
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nextcloud /
polls
