NHibernate DuplicateMappingException when mapping abstract class and subclass
- by stiank81
I have an abstract class, and subclasses of this, and I want to map this to my database using NHibernate. I'm using Fluent, and read on the wiki how to do the mapping. But when I add the mapping of the subclass an NHibernate.DuplicateMappingException is thrown when it is mapping. Why?
Here are my (simplified) classes:
public abstract class FieldValue
{
public int Id { get; set; }
public abstract object Value { get; set; }
}
public class StringFieldValue : FieldValue
{
public string ValueAsString { get; set; }
public override object Value
{
get
{
return ValueAsString;
}
set
{
ValueAsString = (string)value;
}
}
}
And the mappings:
public class FieldValueMapping : ClassMap<FieldValue>
{
public FieldValueMapping()
{
Id(m => m.Id).GeneratedBy.HiLo("1");
// DiscriminateSubClassesOnColumn("type");
}
}
public class StringValueMapping : SubclassMap<StringFieldValue>
{
public StringValueMapping()
{
Map(m => m.ValueAsString).Length(100);
}
}
And the exception:
NHibernate.MappingException : Could not compile the mapping document: (XmlDocument)
---- NHibernate.DuplicateMappingException : Duplicate class/entity mapping NamespacePath.StringFieldValue
Any ideas?
