Fluent NHibernate automapper: skip an intermediate class w/ table-per-subclass

Question

I'm using the Fluent NHibernate mapper with table-per-subclass to map the following structure:

public abstract class A
{
    // properties here
}

public abstract class B : A
{
    // methods here
}

public class C : B
{
    // properties here
}

My database only has tables to represent class A and class C. Class B exists only in my model for my convenience and doesn't contain any properties that needs to be mapped.

How can I get the automapper to skip B and map C as a subclass of A?

Seeing your mapping overrides or manual class maps would be helpful. Also, can you post your initialization where you have the IncludeBase code? — Chris F, Feb 17 '10 at 19:54
I'm using the automapper and I don't have any manual maps or overrides at the moment. — David Pfeffer, Feb 17 '10 at 20:32
FYI, the issue I opened relating to your question has now been resolved. The only thing you need to be aware of for this particular situation is that abstract classes are deemed [layer supertypes](http://martinfowler.com/eaaCatalog/layerSupertype.html) by default, so your `A` class wouldn't get mapped unless you used `IncludeBase` explicitly or overrode the `AbstractClassIsLayerSupertype` configuration method to exclude that class. — James Gregory, May 16 '10 at 15:33

score 2 · Accepted Answer · answered Feb 18 '10 at 09:35

2

The Fluent NHibernate wiki has a section on ignoring base types when automapping that might be worth reading.

answered Feb 18 '10 at 09:35

James Gregory

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If you skip the intermediate subclass with IgnoreBase as the wiki article suggests, then believes class `C` is an independent class unrelated to `A`. – David Pfeffer Feb 18 '10 at 16:10
Ah, bummer. That'll be a bug then. I've created an issue for you to track: http://fluentnhibernate.lighthouseapp.com/projects/33236-core/tickets/128-skip-intermediary-classes-when-automapping-subclasses. – James Gregory Feb 19 '10 at 09:08
Links are dead. I think this is the current version: https://github.com/nhibernate/fluent-nhibernate/wiki/Auto-mapping-generic-base-classes – Erik Knowles Jun 07 '23 at 23:13

Fluent NHibernate automapper: skip an intermediate class w/ table-per-subclass

1 Answers1