fix: persist battery groups without templates

yeg

2026-08-27 2b64fd747005b44b685e616da71b63c92c536fe3

 ruoyi-system/src/main/java/com/ruoyi/system/service/impl/TBatteryGroupServiceImpl.java

@@ -180,7 +180,11 @@
        }
        if (group.getTemplateId() == null)
        {
            throw new ServiceException("模板不能为空");
            if (group.getTemplateFieldRelations() != null && !group.getTemplateFieldRelations().isEmpty())
            {
                throw new ServiceException("未选择模板时不能配置模板字段");
            }
            return;
        }
        if (batteryGroupMapper.selectTemplate(group.getTemplateId()) == null)
        {
@@ -231,6 +235,10 @@
            batteries.add(item);
        }
        batteryGroupMapper.batchInsertBatteries(batteries);
        if (group.getTemplateId() == null)
        {
            return;
        }
        List<TBatteryGroupRelationField> relations = group.getTemplateFieldRelations();
        if (relations == null || relations.isEmpty())
        {