public async Task <IActionResult> UpdateConcert([FromBody] ConcertPayload payload)
{
var concert = await SingleOrError(_concertsRepo.FindOne(EntityId));
await _concertsRepo.Update(concert, payload);
return(Ok());
}
public async Task <IActionResult> SetAttendance([FromRoute] int concertId, [FromBody] bool attending)
{
var concert = await SingleOrError(_concertsRepo
.FindOne(new ConcertIdentifier(GroupId, concertId))
.Include(_ => _.Attendances.Where(a => a.UserId == RequestingUserId)));
await _concertsRepo.SetUserAttendance(concert, RequestingUserId, attending);
return(Ok());
}