public async Task <IActionResult> UpdateEmployeeTask([FromRoute] Guid taskId, JsonPatchDocument <EmployeeTaskUpdateDto> patchTasks)
{
var taskEntity = await _employeeTaskRepository.GetOneTaskAsync(taskId);
//查出来的是EmployeeTask类型，要转换成EmployeeTaskUpdateDto
var dtoToPatch = _mapper.Map <EmployeeTaskUpdateDto>(taskEntity);
//用JsonPatchDocument转化一下Jason Patch操作,相当于把输入的patchTask转换成EmployeeTaskUpdateDto， ModelState返回false如果验证有错误，这里可以空着
patchTasks.ApplyTo(dtoToPatch, ModelState);
//处理验证
if (!TryValidateModel(dtoToPatch))
{
return(ValidationProblem(ModelState));
}
;
//这里要把输入对象转换成目标对象，因为要存进数据库，所以目标类型是EmployeeTask，目标就是taskEntity,CreateMap<EmployeeTaskUpdateDto, EmployeeTask>();
_mapper.Map(dtoToPatch, taskEntity);
//更新task的employeeId的时候要确保这个id确实存在，或者为空
if (!await _employeeRepository.EmployeeExistAsync(taskEntity.EmployeeId) && taskEntity.EmployeeId != null)
{
return(NotFound());
}
_employeeTaskRepository.UpdateTask(taskEntity);
await _employeeTaskRepository.SaveAsync();
return(NoContent());
}