I'm using the table-per-subclass strategy, mapped as joined-subclass. BTW, I solved the issue by providing a custom IModelInspector (derived from ExplicitlyDeclaredModel) which override IsEntity to return false for BusinessContact. This works perfectly fine.
Am Donnerstag, 21. März 2013 08:22:36 UTC+1 schrieb Mac Reiben: > > Hi, > > I'm not a Hibernate export, but I don't see how you define the inheritance > strategy ? > > http://nhforge.org/doc/nh/en/index.html#inheritance-strategies > > You have to define a strategy of inheritance in your mapping. > > Regards, > Mac. > > Le mercredi 20 mars 2013 09:25:15 UTC+1, Andre a écrit : >> >> Hello, >> >> >> I have a class hierarchy that conceptually looks similar to this: >> >> >> <https://lh4.googleusercontent.com/-w3hKntlRKnY/UUlxrFoGCwI/AAAAAAAAAGA/J3kwGDGDT-k/s1600/original.jpg> >> >> >> >> That is, there's an abstract base class (Relation) and a couple of >> derived classes. In practice, Customer and Supplier share a lot of code, so >> I refactored the commonoalities into an abstract class BusinessContact. Now >> the actual class hierarchy looks like this: >> >> >> >> <https://lh4.googleusercontent.com/-gK8StoiTOLw/UUlxwXsdouI/AAAAAAAAAGI/puqW6tyODqY/s1600/augmented.jpg> >> >> >> Or in code: >> >> public abstract class Relation >> { >> public virtual int Id { get; set; } >> } >> >> public class ContactPerson : Relation >> { >> public virtual string PhoneNumber { get; set; } >> } >> >> public abstract class BusinessContact : Relation >> { >> public virtual string Name { get; set; } >> } >> >> public class Customer : BusinessContact >> { >> public virtual string CustomerNumber { get; set; } >> } >> >> public class Supplier : BusinessContact >> { >> public virtual string SupplierNumber { get; set; } >> } >> >> I'd like to map this hierarchy to four tables (Relation, ContactPerson, >> Customer and Supplier) using joined-subclasses in NHibernate, using >> mapping-by-code (ModelMapper). My mapping looks like this: >> >> var mapper = new ModelMapper(); >> >> mapper.Class<Relation>(map => >> { >> map.Id(x => x.Id, id => id.Generator(Generators.Native)); >> }); >> >> mapper.JoinedSubclass<ContactPerson>(map => >> { >> map.Key(key => key.Column("Id")); >> map.Property(x => x.PhoneNumber); >> }); >> >> mapper.JoinedSubclass<Customer>(map => >> { >> map.Key(key => key.Column("Id")); >> map.Property(x => x.Name); >> map.Property(x => x.CustomerNumber); >> }); >> >> mapper.JoinedSubclass<Supplier>(map => >> { >> map.Key(key => key.Column("Id")); >> map.Property(x => x.Name); >> map.Property(x => x.SupplierNumber); >> }); >> >> >> >> However, as soon as I try to add the mapping to the Configuration I get >> an exception: >> >> NHibernate.MappingException: Cannot extend unmapped class: >> BusinessContact >> >> I basically understand why this happens. The generated mapping looks like >> this: >> >> <?xml version="1.0" encoding="utf-8"?> >> <hibernate-mapping xmlns:xsi=" >> http://www.w3.org/2001/XMLSchema-instance"; xmlns:xsd=" >> http://www.w3.org/2001/XMLSchema"; namespace="JoinedSubClassMapping" >> assembly="JoinedSubClassMapping" xmlns="urn:nhib ernate-mapping-2.2"> >> <class name="Relation" abstract="true"> >> <id name="Id" type="Int32"> >> <generator class="native" /> >> </id> >> </class> >> <joined-subclass name="ContactPerson" extends="Relation"> >> <key column="Id" /> >> <property name="PhoneNumber" /> >> </joined-subclass> >> <joined-subclass name="Customer" extends="BusinessContact"> >> <key column="Id" /> >> <property name="CustomerNumber" /> >> </joined-subclass> >> <joined-subclass name="Supplier" extends="BusinessContact"> >> <key column="Id" /> >> <property name="SupplierNumber" /> >> </joined-subclass> >> </hibernate-mapping> >> >> Customer and Supplier define BusinessContact in their extends attribute, >> as if BusinessContact was a "normal" entity in the model. As there's no >> mapping for BusinessContact, this fails, or course. Note that the "Name" >> property (defined in BusinessContact does not appear in the mapping either. >> >> What I *want *the mapping to look like is this: >> >> <?xml version="1.0" encoding="utf-8" ?> >> <hibernate-mapping xmlns:xsi=" >> http://www.w3.org/2001/XMLSchema-instance"; xmlns:xsd=" >> http://www.w3.org/2001/XMLSchema"; namespace="JoinedSubClassMapping" >> assembly="JoinedSubClassMapping" xmlns="urn:nhibernate-mapping-2.2"> >> <class name="Relation" abstract="true"> >> <id name="Id" type="Int32"> >> <generator class="native" /> >> </id> >> </class> >> <joined-subclass name="ContactPerson" extends="Relation"> >> <key column="Id" /> >> <property name="PhoneNumber" /> >> </joined-subclass> >> <joined-subclass name="Customer" extends="Relation"> >> <key column="Id" /> >> <property name="CustomerNumber" /> >> <property name="Name" /> >> </joined-subclass> >> <joined-subclass name="Supplier" extends="Relation"> >> <key column="Id" /> >> <property name="SupplierNumber" /> >> <property name="Name" /> >> </joined-subclass> >> </hibernate-mapping> >> >> That is, make Supplier and Customer extend Relation and include all the >> mapped properties of the (otherwise unmapped) BusinessContact class. >> >> How can I achieve this? >> >> Thanks a lot for your time, >> Andre >> > -- You received this message because you are subscribed to the Google Groups "nhusers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/nhusers?hl=en-US. For more options, visit https://groups.google.com/groups/opt_out.
