diff --git a/controllers/api_controller.go b/controllers/api_controller.go
index dd8854f91..1d1a37f43 100644
--- a/controllers/api_controller.go
+++ b/controllers/api_controller.go
@@ -166,14 +166,18 @@ func (c *ApiController) CallOpenAPI() {
 success:
 	{
 		callResult.Code = model.ErrCodeSuccess
-		callResult.Data = result[0].String()
+		if len(result) > 0 {
+			callResult.Data = result[0].String()
+		}
 		c.Data["json"] = callResult
 		c.ServeJSON()
 	}
 end:
 	{
 		callResult.Code = errCode
-		callResult.Desc = err.Error()
+		if err != nil {
+			callResult.Desc = err.Error()
+		}
 		c.Data["json"] = callResult
 		c.ServeJSON()
 	}