root
62 lines
1.9 KiB
PHP
62 lines
1.9 KiB
PHP
<?php
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namespace App\Database\Migrations;
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use CodeIgniter\Database\Migration;
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class AllowCompetitionWinnerRankTies extends Migration
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{
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public function up()
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{
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$db = \Config\Database::connect();
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if (!$db->tableExists('competition_winners')) {
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return;
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}
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if ($this->indexExists($db, 'competition_winners', 'competition_id_class_section_id_rank')) {
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$db->query('DROP INDEX competition_id_class_section_id_rank ON competition_winners');
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}
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if (! $this->indexExists($db, 'competition_winners', 'competition_id_class_section_id_rank')) {
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$db->query(
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'CREATE INDEX competition_id_class_section_id_rank ON competition_winners (competition_id, class_section_id, rank)'
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);
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}
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}
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public function down()
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{
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$db = \Config\Database::connect();
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if (!$db->tableExists('competition_winners')) {
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return;
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}
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if ($this->indexExists($db, 'competition_winners', 'competition_id_class_section_id_rank')) {
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$db->query('DROP INDEX competition_id_class_section_id_rank ON competition_winners');
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}
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$db->query(
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'ALTER TABLE competition_winners ADD UNIQUE KEY competition_id_class_section_id_rank (competition_id, class_section_id, rank)'
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);
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}
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private function indexExists($db, string $table, string $index): bool
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{
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if (method_exists($db, 'indexExists')) {
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return $db->indexExists($table, $index);
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}
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$dbName = $db->getDatabase();
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$builder = $db->table('information_schema.STATISTICS');
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$row = $builder
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->select('INDEX_NAME')
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->where('TABLE_SCHEMA', $dbName)
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->where('TABLE_NAME', $table)
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->where('INDEX_NAME', $index)
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->get()
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->getRowArray();
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return ! empty($row);
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}
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}
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