public async Task <ActionResult <EmployeeTaskDto> > CreateNewTask([FromBody] EmployeeTaskAddDto employeeTask)
        {
            var entity = _mapper.Map <EmployeeTask>(employeeTask);

            _employeeTaskRepository.AddTask(entity);
            await _employeeTaskRepository.SaveAsync();

            var employeeTaskDto = _mapper.Map <EmployeeTaskDto>(entity);

            return(CreatedAtRoute(nameof(GetTaskByTaskId), routeValues:
                                  new {
                //这里必须要给employeeId一个空值,因为路径是api/employees/{employeeId}/employeetask,
                //ApiController会去找employeeId,如果没有空值路由的{employeeId}段会砍掉就找不到查看的url了

                //后来我把ApiController这一层级的route改了,就不用加这个空employeeId了!!!
                //employeeId = Guid.Empty,
                taskId = employeeTaskDto.taskId
            }, value: employeeTaskDto));
        }
        public async Task <ActionResult <EmployeeTaskDto> > CreateNewTaskForEmployee(Guid employeeId, [FromBody] EmployeeTaskAddDto employeeTask)
        {
            //EmployeeExistAsync返回类型是task<bool>,这里是异步的,所以要await
            if (!await _employeeRepository.EmployeeExistAsync(employeeId))
            {
                return(NotFound());
            }
            var entity = _mapper.Map <EmployeeTask>(employeeTask);

            _employeeTaskRepository.AddTask(employeeId, entity);
            await _employeeTaskRepository.SaveAsync();

            var employeeTaskDto = _mapper.Map <EmployeeTaskDto>(entity);

            return(CreatedAtRoute(nameof(GetTaskByTaskId), routeValues: new
            {
                //employeeId = employeeId,
                taskId = employeeTaskDto.taskId
            }, value: employeeTaskDto));
        }