nhibernate : a different object with the same identifier value was already associated with the sessi
- by frosty
I am getting the following error when i tried and save my "Company" entity in my mvc application
a different object with the same identifier value was already associated with the session: 2, of entity:
I am using an IOC container
private class EStoreDependencies : NinjectModule
{
public override void Load()
{
Bind<ICompanyRepository>().To<CompanyRepository>().WithConstructorArgument("session",
NHibernateHelper.OpenSession());
}
}
My CompanyRepository
public class CompanyRepository : ICompanyRepository
{
private ISession _session;
public CompanyRepository(ISession session)
{
_session = session;
}
public void Update(Company company)
{
using (ITransaction transaction = _session.BeginTransaction())
{
_session.Update(company);
transaction.Commit();
}
}
}
And Session Helper
public class NHibernateHelper
{
private static ISessionFactory _sessionFactory;
const string SessionKey = "MySession";
private static ISessionFactory SessionFactory
{
get
{
if (_sessionFactory == null)
{
var configuration = new Configuration();
configuration.Configure();
configuration.AddAssembly(typeof(UserProfile).Assembly);
configuration.SetProperty(NHibernate.Cfg.Environment.ConnectionStringName,
System.Environment.MachineName);
_sessionFactory = configuration.BuildSessionFactory();
}
return _sessionFactory;
}
}
public static ISession OpenSession()
{
var context = HttpContext.Current;
//.GetCurrentSession()
if (context != null && context.Items.Contains(SessionKey))
{
//Return already open ISession
return (ISession)context.Items[SessionKey];
}
else
{
//Create new ISession and store in HttpContext
var newSession = SessionFactory.OpenSession();
if (context != null)
context.Items[SessionKey] = newSession;
return newSession;
}
}
}
My MVC Action
[HttpPost]
public ActionResult Edit(EStore.Domain.Model.Company company)
{
if (company.Id > 0)
{
_companyRepository.Update(company);
_statusResponses.Add(StatusResponseHelper.Create(Constants
.RecordUpdated(), StatusResponseLookup.Success));
}
else
{
company.CreatedByUserId = currentUserId;
_companyRepository.Add(company);
}
var viewModel = EditViewModel(company.Id, _statusResponses);
return View("Edit", viewModel);
}
