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 just encountered this and Claiton Lovato's answer didn't work. However Iko's did work. Here's a little more robust version of Iko's. Downside is x2 trips to the db - one for the Get and another for the insert/update.

A possible solution to this is to read the object from the database, copy the fields to the object, and save it.

public void Save(Company company)
{

    Company dbCompany = null;
    //update
    if (company.Id != 0)
    {
        dbCompany = _companyRepository.Get(company.Id);
        dbCompany.PropertyToUpdate = company.PropertyToUpdate;
    }
    //insert
    else
    {
        dbDefaultFreightTerm = company;
    }
    // Save either the brand new object as an insert
    // Or update the original dbCompany object with an update
    _companyRepository.SaveOrUpdate(company);
}