修正当模型定义了const UPDATED_AT = null;时批量插入导致的额外添加了更新时间导致的异常错误

Author: TestAdmin007

src/Batch.php

@@ -295,12 +295,12 @@ public function insert(Model $table, array $columns, array $values, int $batchSi
             $addCreatedAtValue = false;
             $addUpdatedAtValue = false;
 
-            if (!in_array($createdAtColumn, $columns)) {
+            if ($createdAtColumn && !in_array($createdAtColumn, $columns)) {
                 $addCreatedAtValue = true;
                 array_push($columns, $createdAtColumn);
             }
 
-            if (!in_array($updatedAtColumn, $columns)) {
+            if ($updatedAtColumn && !in_array($updatedAtColumn, $columns)) {
                 $addUpdatedAtValue = true;
                 array_push($columns, $updatedAtColumn);
             }