Question

I have a base class that looks like this:

public abstract class MyBaseClass
{
    public virtual DateTime UpdatedOn { get; set; }
}

I then have a series of other entities that inherit from this:

public class User : MyBaseClass
{
    public virtual string UserName { get; set; }
    public virtual string Password { get; set; }
}

My mapping for User would be:

public class UserMap : ClassMap<User>
{
    public UserMap()
    {
        Id(x => x.UserName);
        Map(x => x.Password);

        Map(x => x.UpdatedOn);
    }
}

I then have other entities, mapped the same way.
My problem is I get the following error:

Tried to add property ‘UpdatedOn’ when already added.

I guess this is because I map the UpdatedOn column in every entity?
Each of my tables has this UpdatedOn column, so how should I be mapping it?

Answer 1

Use a derived class in fluent nHibernate

This question should help you out. You can basically use a base fluent nhibernate mapping class to map your UpdatedOn column and derive all of your other mapping classes from that base class.