gx

@@ -57,7 +57,7 @@ class Product extends Base
                 $value[$k] = $v;
             }
         }else{
-            $value = json_decode([]);
+            $value = json_encode([]);
         }
         return $value;
     }
@@ -77,7 +77,7 @@ class Product extends Base
                 $value[$k] = $v;
             }
         }else{
-            $value = json_decode([]);
+            $value = json_encode([]);
         }
         return $value;
     }