改进关联字段的动态获取器的自动append

src/model/concern/Attribute.php

@@ -712,14 +712,14 @@ public function withFieldAttr(string | array $name, ?Closure $callback = null)
             }
         } else {
             $name = $this->getRealFieldName($name);
+            $this->append([$name], true);
 
             if (str_contains($name, '.')) {
                 [$name, $key] = explode('.', $name);
 
                 $this->withAttr[$name][$key] = $callback;
             } else {
                 $this->withAttr[$name] = $callback;
-                $this->append([$name], true);
             }
         }