public IActionResult PostEventRegistration(long id, RegistrationData regData)
{
var evtDbo = _context.Events.Find(id);
if (evtDbo == null)
{
return(NotFound());
}
// https://docs.microsoft.com/en-us/ef/ef6/saving/transactions
// Not sure what happens if the event was removed in the meamwhile
_context.Entry(evtDbo).Collection(e => e.Registrations).Load();
using (var dbContextTransaction = _context.Database.BeginTransaction()) {
var regDbo = new RegistrationDbo();
regDbo.CopyFrom(regData);
evtDbo.Registrations.Add(regDbo);
_context.Update(evtDbo);
_context.SaveChanges();
dbContextTransaction.Commit();
}
if (evtDbo.Registrations == null)
{
evtDbo.Registrations = new List <RegistrationDbo>();
}
var evtDto = CreateEventResponse(evtDbo);
return(CreatedAtAction(nameof(GetEvent), new { evtDbo.EventDboId }, evtDto));
}
private RegistrationResponse CreateRegistrationResponse(RegistrationDbo dbo, bool canAddRegistrations, bool canPatchEvent)
{
var response = new RegistrationResponse {
Id = dbo.RegistrationDboId, Data = new RegistrationData()
};
response.Data.CopyFrom(dbo);
// registrations from an event in the past nor from a locked event can be deleted or patched.
if (canAddRegistrations && canPatchEvent)
{
response.AddHref(HrefType.DELETE, $"api/events/{dbo.EventDboId}/registrations/{dbo.RegistrationDboId}");
response.AddHref(HrefType.PATCH, $"api/events/{dbo.EventDboId}/registrations/{dbo.RegistrationDboId}");
}
return(response);
}
