diff --git a/app/api/controller/TaskController.php b/app/api/controller/TaskController.php
index c385fffa5..702184300 100644
--- a/app/api/controller/TaskController.php
+++ b/app/api/controller/TaskController.php
@@ -652,6 +652,7 @@ class TaskController extends BaseApiController
         $param = $this->request->param();
         $task = Task::where(['id'=>$param['id']])->find();
         $taskTemplate = TaskTemplate::where(['id'=>$task['template_id']])->find();
+        $extend = $taskTemplate['extend'];
         $extend['purchase_sales_info'][] = $param['purchase_sales_info'];
         $taskTemplate->save(['extend'=>json_encode($extend)]);
         return $this->success('成功', []);