diff --git a/app/common/service/PostService.php b/app/common/service/PostService.php
index eac29a6..cc38256 100644
--- a/app/common/service/PostService.php
+++ b/app/common/service/PostService.php
@@ -119,7 +119,7 @@ class PostService
 
         $category = PostCategory::where('id',$data['category_id'])->first();
         $models = explode(',',$data['model']);
-        foreach ($data['model'] as $key => $model) {
+        foreach ($models as $key => $model) {
             $code = (new SkuService)->generateUniqueCode();
             Sku::firstOrCreate(['model' => $model], ['category_id' => $data['category_id'],
                 'product_name' => $category['name'],'code' => $code]);