62 lines
2.5 KiB
PHP
62 lines
2.5 KiB
PHP
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<?php
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/**
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* Copyright (C) 2019 Xibo Signage Ltd
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*
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* Xibo - Digital Signage - http://www.xibo.org.uk
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*
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* This file is part of Xibo.
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*
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* Xibo 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 published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* Xibo 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 Xibo. If not, see <http://www.gnu.org/licenses/>.
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*/
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use Phinx\Migration\AbstractMigration;
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/**
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* Class MakeDisplayLicenseColumnUniqueMigration
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*/
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class MakeDisplayLicenseColumnUniqueMigration extends AbstractMigration
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{
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/** @inheritdoc */
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public function change()
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{
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// query the database and look for duplicate entries
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$duplicatesData = $this->query('SELECT displayId, license FROM display WHERE license IN ( SELECT license FROM display GROUP BY license HAVING count(*) > 1) GROUP BY displayId;');
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$rowsDuplicatesData = $duplicatesData->fetchAll(PDO::FETCH_ASSOC);
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// only execute this code if any duplicates were found
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if (count($rowsDuplicatesData) > 0) {
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$licences = [];
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$filtered = [];
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// create new array with license as the key
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foreach ($rowsDuplicatesData as $row) {
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$licences[$row['license']][] = $row['displayId'];
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}
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// iterate through the array and remove first element from each of the arrays with displayIds
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foreach ($licences as $licence) {
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array_shift($licence);
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$filtered[] = $licence;
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}
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// iterate through our new filtered array, that only contains displayIds that should be removed and execute the SQL DELETE statements
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foreach ($filtered as $item) {
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foreach ($item as $displayId) {
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$this->execute('DELETE FROM lkdisplaydg WHERE displayId = ' . $displayId);
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$this->execute('DELETE FROM display WHERE `displayId` = ' . $displayId);
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}
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}
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}
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// add unique index to license column
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$table = $this->table('display');
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$table->addIndex(['license'], ['unique' => true])->update();
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}
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}
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