fix(attributes): drop index lengths and orders with a deleted attribute

src/Database/Trait/Attributes.php

@@ -915,13 +915,22 @@ private static function withoutIndexedAttribute(array $indexes, string $key): ar
                 continue;
             }
 
-            $attributes = \array_values(\array_filter(
-                $index->attributes,
-                static fn (string $attribute): bool => $attribute !== $key,
-            ));
+            // Lengths and orders are positional, so drop the entry at each removed attribute's position too.
+            $document = $index->toDocument();
+            $attributes = $index->attributes;
+            $lengths = (array) $document->getAttribute('lengths', []);
+            $orders = (array) $document->getAttribute('orders', []);
+            foreach (\array_reverse(\array_keys($attributes, $key, true)) as $position) {
+                \array_splice($attributes, $position, 1);
+                \array_splice($lengths, $position, 1);
+                \array_splice($orders, $position, 1);
+            }
 
             if ($attributes !== []) {
-                $remaining[] = self::withIndexedAttributes($index, $attributes);
+                $remaining[] = Index::fromDocument($document
+                    ->setAttribute(self::INDEX_ATTRIBUTES, $attributes)
+                    ->setAttribute('lengths', $lengths)
+                    ->setAttribute('orders', $orders));
             }
         }
 

tests/e2e/Adapter/Scopes/IndexTests.php

@@ -137,6 +137,29 @@ public function testCreateDeleteIndex(): void
         $database->deleteCollection('indexes');
     }
 
+    public function testDeleteAttributeKeepsIndexLengthsAligned(): void
+    {
+        /** @var Database $database */
+        $database = $this->getDatabase();
+
+        $database->createCollection(Collection::create(id: 'indexLengths', attributes: [
+            Attribute::string(key: 'first', size: 128),
+            Attribute::string(key: 'second', size: 128),
+        ], indexes: [
+            Index::key(key: 'pair', attributes: ['first', 'second'], lengths: [64, 32], orders: [OrderDirection::Asc, OrderDirection::Desc]),
+        ]));
+
+        $database->deleteAttribute('indexLengths', 'first');
+
+        $index = $database->getCollection('indexLengths')->indexes()[0];
+        $this->assertSame([32], $index->lengths);
+        $this->assertSame([OrderDirection::Desc], $index->orders);
+
+        $database->updateAttribute('indexLengths', 'second', new Update(size: 256));
+
+        $database->deleteCollection('indexLengths');
+    }
+
     public function testCreateUniqueIndexOverDuplicates(): void
     {
         $database = $this->getDatabase();