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I've scoured Google and SO but haven't come across anyone having the same problem. Here is my model:

public class Hierarchy
{
    public virtual Event Prerequisite { get; set; }
    public virtual Event Dependent { get; set; }

    public override bool Equals(object obj) 
    {
        var other = obj as Hierarchy; 
        if (other == null) 
        { 
            return false; 
        } 
        else 
        { 
            return this.Prerequisite == other.Prerequisite && this.Dependent == other.Dependent; 
        } 
    }

    public override int GetHashCode()
    {
        return (Prerequisite.Id.ToString() + "|" + Dependent.Id.ToString()).GetHashCode();
    }
}

Here is my mapping:

public class HierarchyMap : ClassMap<Hierarchy>
{
    public HierarchyMap()
    {
        CompositeId()
            .KeyReference(h => h.Prerequisite, "PrerequisiteId")
            .KeyReference(h => h.Dependent, "DependentId");
    }
}

And here is the ever present result:

{"The entity 'Hierarchy' doesn't have an Id mapped. Use the Id method to map your identity property. For example: Id(x => x.Id)."}

Is there some special configuration I need to do to enable composite id's? I have the latest FNh (as of 6/29/2012).

Edit

I consider the question open even though I've decided to map an Id and reference the 2 Event's instead of using a CompositeId. Feel free to propose an answer.

Handprint
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  • this looks good and a simple example of mine doesn't throw. are you sure you do not have another opr older Version of the map which doesn't have it mapped? – Firo Jul 18 '12 at 10:53
  • This is a new entity that I'm trying to UpdateSchema() on. I've double checked the dll versions. I'm trying to dig into the configuration defaults to see if there is something I need to override. But, per the Nhibernate source, "prefer a surrogate key to a composite key." So I just might give in forget the CompositeId altogether. – Handprint Jul 19 '12 at 12:56
  • it is definitly better to use surrogate ids. However if you comment one keyreference, does it work better? – Firo Jul 19 '12 at 14:22
  • A clever test. =) But it still wants Id mapped. – Handprint Jul 19 '12 at 15:04
  • the ultimative test would be to map an Id property and see it fail again ^^ – Firo Jul 19 '12 at 19:24
  • I'll just go with a separate Id and then reference the 2 events as suggested. Thanks!... Would still like to see a solution for this though. =) – Handprint Jul 20 '12 at 18:08

1 Answers1

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I figured out this was due to auto mapping trying to auto map the ID Even though i had an actual map for my class - it still tried to auto map the ID. Once i excluded the class from auto mapping, it worked just fine.

sianabanana
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