updated the code to apply null checking at the source level only as the index needs to have string for created at and upated at

Author: ArnabChatterjee20k

src/Migration/Resources/Database/Index.php

@@ -7,16 +7,12 @@
 
 class Index extends Resource
 {
-    protected static string $timeStampFormatDb = 'Y-m-d H:i:s.v';
     public const TYPE_UNIQUE = 'unique';
 
     public const TYPE_FULLTEXT = 'fulltext';
 
     public const TYPE_KEY = 'key';
 
-    protected string $createdAt;
-    protected string $updatedAt;
-
     /**
      * @param string $id
      * @param string $key
@@ -25,7 +21,7 @@ class Index extends Resource
      * @param array<string> $attributes
      * @param array<int> $lengths
      * @param array<string> $orders
-     * @param string|null $createdAt
+     * @param string $createdAt
      * @param string $updatedAt
      */
     public function __construct(
@@ -36,14 +32,10 @@ public function __construct(
         private readonly array $attributes = [],
         private readonly array $lengths = [],
         private readonly array $orders = [],
-        ?string $createdAt = null,
-        ?string $updatedAt = null,
+        protected string $createdAt = "",
+        protected string $updatedAt = "",
     ) {
         $this->id = $id;
-        $date = new \DateTime();
-        $now = $date->format(self::$timeStampFormatDb);
-        $this->$createdAt = $createdAt ?? $now;
-        $this->$updatedAt = $updatedAt ?? $now;
     }
 
     /**

src/Migration/Sources/Appwrite.php

@@ -11,6 +11,7 @@
 use Appwrite\Services\Teams;
 use Appwrite\Services\Users;
 use Utopia\Database\Database as UtopiaDatabase;
+use Utopia\Database\DateTime as DbDateTime;
 use Utopia\Migration\Exception;
 use Utopia\Migration\Resource;
 use Utopia\Migration\Resources\Auth\Hash;
@@ -921,8 +922,8 @@ private function exportIndexes(int $batchSize): void
                         $index['attributes'],
                         [],
                         $index['orders'],
-                        $index['$createdAt'],
-                        $index['$updatedAt'],
+                        $index['$createdAt'] = empty($index['$createdAt']) ? DbDateTime::now() : $index['$createdAt'],
+                        $index['$updatedAt'] = empty($index['$updatedAt']) ? DbDateTime::now() : $index['$updatedAt'],
                     );
                 }