补充

ems/ems-cloud/ems-server/src/main/java/com/ruoyi/ems/controller/EmsObjAttrEnumController.java

@@ -35,7 +35,7 @@ public class EmsObjAttrEnumController extends BaseController {
      */
     @GetMapping("/list")
     public AjaxResult list(@RequestParam(name = "modelCode") String modelCode,
-        @RequestParam(name = "attrKey") String attrKey) {
+        @RequestParam(name = "attrKey", required = false) String attrKey) {
         List<EmsObjAttrEnum> list = objAttrEnumService.getObjAttrEnumList(modelCode, attrKey);
         return success(list);
     }