nHibernate 2.1: Save a new entity in a for

Question

Well, this is driving me crazy, I cannot understand why is this happening. I have a method for saving a list of JobExperiences and a JobExperience has a relation to a Company. The problem comes that Im trying to create a new Company inside the foreach and save it, but nHibernate is trying to save the JobExperience also ... and it is not referenced to the JobExperience!. Here is my code:

 foreach (JobExperience exp in expList)
 {
    if (exp.Company.IsNew)
    {
        try
        {
            Company c = new Company();
            c.Name = "CompanyTest";

            companyService.Save(c); //throws an exception!
        }
        catch (Exception ex)
        { 

        }
    }

So, at that line is trying to save the JobExperience and it is showing an exception cause it is a non saved one. But, if I try this:

try
{
    Company c = new Company();
    c.Name = "CompanyTest";

    companyService.Save(c);
}
catch (Exception ex)
{

}

foreach (JobExperience exp in expList)
{
//[... code excluded for abbreviation ]

That works!, and it is not trying to save any JobExperience!....

Any thoughts why is this happening?

Answer 1

This looks like the relationship between is currently mandatory, and you have two basic choices:
1) if in your system, it is possible to have JobExperience without a Company, you can just change the relationship mapping to be optional by saying not-null="true in your hbm (or the equivalent in some fluent mapping tool if you are using one).
2) if the relationship should be mandatory, you should save a company first.

HTH,
Berryl