Clean database, to avoid double participations on event

src/Bundle/ChillEventBundle/migrations/Version20231128114959.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Chill\Migrations\Event;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20231128114959 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Add unique index on participation and drop column participation::lastUpdate';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('UPDATE chill_event_participation SET updatedAt=lastupdate WHERE updatedat IS NULL');
+        $this->addSql('ALTER TABLE chill_event_participation DROP lastupdate');
+        $this->addSql('WITH ordering AS (SELECT id, event_id, person_id, rank() OVER (PARTITION BY event_id, person_id ORDER BY id DESC) as ranked FROM chill_event_participation),
+     not_last AS (SELECT * FROM ordering where ranked > 1)
+     DELETE FROM chill_event_participation WHERE id IN (select id FROM not_last)');
+        $this->addSql('CREATE UNIQUE INDEX chill_event_participation_event_person_unique_idx ON chill_event_participation (event_id, person_id)');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('DROP INDEX chill_event_participation_event_person_unique_idx');
+        $this->addSql('ALTER TABLE chill_event_participation ADD lastupdate TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL');
+        $this->addSql('UPDATE chill_event_participation set lastupdate = updatedat');
+    }
+}