public async Task InsertGroupGradeByUserIdAsync(long topicId, long userId, long groupId, int grade)
{
//调用TopicService中GetSeminarGroupTopicById(long topicId, long groupId)方法
var seminarGroupTopic = await _iTopicService.GetSeminarGroupTopicByIdAsync(topicId, groupId);
//调用UserService中的GetUserByUserId(long userId)方法
var userInfo = await _iUserService.GetUserByUserIdAsync(userId);
//调用自己的dao
await _iGradeDao.InsertGroupGradeByUserIdAsync(seminarGroupTopic, userInfo, grade);
}
