Enforce filename uniqueness in StoredObjectVersion with partial unique index...

.changes/unreleased/Fixed-20251013-123932.yaml

@@ -0,0 +1,6 @@
+kind: Fixed
+body: Add unique condition on stored object filename, with cleaning step on existing duplicate filenames
+time: 2025-10-13T12:39:32.85885314+02:00
+custom:
+    Issue: "446"
+    SchemaChange: Drop or rename table or columns, or enforce new constraint that must be manually fixed

src/Bundle/ChillDocStoreBundle/Entity/StoredObjectVersion.php

@@ -23,10 +23,14 @@ use Random\RandomException;
  * Store each version of StoredObject's.
  *
  * A version should not be created manually: use the method @see{StoredObject::registerVersion} instead.
+ *
+ * Each filename must be unique within the same StoredObject. We add a condition on id to apply this condition only for
+ * newly created versions when this new index is applied.
  */
 #[ORM\Entity]
 #[ORM\Table('chill_doc.stored_object_version')]
 #[ORM\UniqueConstraint(name: 'chill_doc_stored_object_version_unique_by_object', columns: ['stored_object_id', 'version'])]
+#[ORM\UniqueConstraint(name: 'chill_doc_stored_object_version_unique_by_filename', columns: ['filename'], options: ['where' => '(id > 0)'])]
 class StoredObjectVersion implements TrackCreationInterface
 {
     use TrackCreationTrait;

src/Bundle/ChillDocStoreBundle/migrations/Version20251013094414.php

@@ -0,0 +1,63 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\Migrations\DocStore;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20251013094414 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'DocStore: Enforce filename uniqueness on chill_doc.stored_object_version; clean duplicates and add partial unique index on filename (for new rows only).';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // 1) Clean duplicates: for each (stored_object_id, filename, key, iv), keep only the last inserted row
+        //    and delete all others. Use ROW_NUMBER over id DESC to define the last one.
+        $this->addSql(<<<'SQL'
+            WITH ranked AS (
+                SELECT id,
+                       rank() OVER (
+                           PARTITION BY stored_object_id, filename, "key"::jsonb, iv::jsonb
+                           ORDER BY id DESC
+                       ) AS rn
+                FROM chill_doc.stored_object_version
+            )
+            DELETE FROM chill_doc.stored_object_version sov
+            USING ranked r
+            WHERE sov.id = r.id
+              AND r.rn > 1
+        SQL);
+
+        // 2) Create a partial unique index on filename that applies only to subsequently inserted rows.
+        //    Per user's instruction, compute the cutoff using the stored_object_id sequence value.
+        $nextVal = (int) $this->connection->fetchOne("SELECT nextval('chill_doc.stored_object_version_id_seq')");
+
+        // Safety: if somehow sequence is not available, fallback to current max id from the table
+        if ($nextVal <= 0) {
+            $nextVal = (int) $this->connection->fetchOne('SELECT COALESCE(MAX(id), 0) FROM chill_doc.stored_object_version');
+        }
+
+        $this->addSql(sprintf(
+            'CREATE UNIQUE INDEX chill_doc_stored_object_version_unique_by_filename ON chill_doc.stored_object_version (filename) WHERE id > %d',
+            $nextVal
+        ));
+    }
+
+    public function down(Schema $schema): void
+    {
+        // Drop the partial unique index; data cleanup is irreversible.
+        $this->addSql('DROP INDEX IF EXISTS chill_doc_stored_object_version_unique_by_filename');
+    }
+}