public async Task CreateAsync(CreateSession cmd)
{
cmd.Validate();
if (await _sessionsDao.ExistsByIdAsync(cmd.Id))
{
throw new ObjectAlreadyExitsException(cmd.Id, typeof(SeminarSession));
}
if (await _sessionsDao.ExistsByWhereAsync($"SeminarId = '{cmd.SeminarId}' AND Status != '{SessionStatus.Finished}'"))
{
throw new DomainException($"Can't create a seminar: {cmd.SeminarId} session until all sessions have finished");
}
if (await _seminarDao.ExistsAsync(cmd.Id))
{
throw new ObjectNotFoundException(cmd.SeminarId, typeof(Seminar));
}
await _sessionsDao.AddAsync(new SeminarSession(cmd));
}
