改进saveall方法

Author: liu21st

src/Model.php

@@ -571,12 +571,17 @@ public static function saveAll(iterable $dataSet, bool $replace = true): Collect
         $pk     = $model->getPk();
         foreach ($dataSet as $key => $data) {
             $model  = new static;
-            $exists = true;
-            foreach ((array) $pk as $field) {
-                if (is_string($field) && !isset($data[$field])) {
-                    $exists = false;
+            if ($replace) {
+                $exists = true;
+                foreach ((array) $pk as $field) {
+                    if (is_string($field) && !isset($data[$field])) {
+                        $exists = false;
+                    }
                 }
+            } else {
+                $exists = false;
             }
+
             $model->replace($replace)->exists($exists)->save($data);
             $result[$key] = $model->fetchModel($model);
         }