diff --git a/app/common/service/PostService.php b/app/common/service/PostService.php
index 6756389..eac29a6 100644
--- a/app/common/service/PostService.php
+++ b/app/common/service/PostService.php
@@ -118,12 +118,12 @@ class PostService
         unset($data['media']);
 
         $category = PostCategory::where('id',$data['category_id'])->first();
+        $models = explode(',',$data['model']);
         foreach ($data['model'] as $key => $model) {
             $code = (new SkuService)->generateUniqueCode();
             Sku::firstOrCreate(['model' => $model], ['category_id' => $data['category_id'],
                 'product_name' => $category['name'],'code' => $code]);
         }
-        $data['model'] = implode(',',$data['model']);
 
         return $data;
     }