取消有子单的。提示：退单请入详情内操作！

ghy-admin/src/main/java/com/ghy/web/controller/order/OrderMasterController.java

@@ -735,6 +735,13 @@ public class OrderMasterController extends BaseController {
     @PostMapping("/cancel")
     @ResponseBody
     public AjaxResult cancel(Long orderMasterId) throws BaseAdaPayException {
+        // 校验
+        List<OrderDetail> orderDetails = orderDetailService.selectByOrderMasterId(orderMasterId);
+        for (OrderDetail detail : orderDetails) {
+            if (detail.getOrderStatus() != 6) {
+                return AjaxResult.error("退单请入详情内操作！");
+            }
+        }
         orderMasterService.applyForCancel(orderMasterId);
         return AjaxResult.success();
     }