nhibernate : a different object with the same identifier value was already associated with the session: 2, of entity:

Question

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 alre

Answer 1

I know this is a bit late and you might already found the solution, but maybe others could benefit from it...

This error is raised from nHibernate when you are updating an instance of an Entity that is saved on the Cache. Basically nHibernate stores your objects on the cache once you loaded it, so next calls would get it from the cache. If you update an instance that is present on the cache nHibernate throws this error otherwise it could cause dirty reads and conflicts regarding loading the old copy of the object. To get around this, you need to remove the object from the cache using the Evict method like:

public ActionResult Edit(EStore.Domain.Model.Company company) 
{ 

        if (company.Id > 0) 
        { 
            **ISession.Evict(company);**
            _companyRepository.Update(company);

Hope this helps.