>From NH's mapping point of view, it doesn't matter that IberianLynx
extends EndangeredAnimal,
as it's seen as an Animal subclass.
Also, you can have many <join>s, so NH wouldn't know where to put it.
You can probably specify the same join in IberianLynx, although schema
generation might fail.
Diego
On Fri, Aug 20, 2010 at 15:23, v64 <[email protected]> wrote:
> I'm trying to map a deep class hierarchy and having trouble getting
> the desired mapping. Here's an example:
>
> Classes:
>
> namespace Animals
> {
> public class Animal
> {
> public string SpeciesName { get; set; }
> }
>
> public class DomesticAnimal : Animal
> {
> public string Name { get; set; }
> }
>
> public class WildAnimal : Animal
> {
> public string Habitat { get; set; }
> public bool IsPredator { get; set; }
> }
>
> public class EndangeredAnimal : WildAnimal
> {
> public string RedListID { get; set; }
> public int Population { get; set; }
> public string Status { get; set; }
> }
>
> public class IberianLinx : EndangeredAnimal
> {
> public int WhiskerLength { get; set; }
> public int StripeCount { get; set; }
> }
> }
>
> Mapping:
>
> <?xml version="1.0" encoding="utf-8" ?>
> <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
> assembly="Animals">
>
> <class name="Animals.Animal" abstract="true" table="Animal">
> <id type="int" unsaved-value="0">
> <generator class="native"/>
> </id>
> <discriminator column ="AnimalType" type="string" length="64"/>
> <property name="SpeciesName"/>
>
> <subclass name="Animals.DomesticAnimal" discriminator-
> value="DomesticAnimal">
> <property name="Name"/>
> </subclass>
>
> <subclass name="Animals.WildAnimal" discriminator-
> value="WildAnimal">
> <property name="Habitat"/>
> <property name="IsPredator"/>
> </subclass>
>
> <subclass name="Animals.EndangeredAnimal" discriminator-
> value="EndangeredAnimal">
> <join table="EndangeredAnimal">
> <key column="AnimalID"/>
> <property name="RedListID"/>
> <property name="Population"/>
> <property name="Status"/>
> </join>
>
> <subclass name="Animals.IberianLinx" discriminator-
> value="IberianLinx">
> <property name="WhiskerLength"/>
> <property name="StripeCount"/>
> </subclass>
> </subclass>
> </class>
>
> </hibernate-mapping>
>
> When I generate the schema I get these:
>
> create table Animal
> (
> id INT IDENTITY NOT NULL,
> AnimalType NVARCHAR(64) not null,
>
> SpeciesName NVARCHAR(255) null,
> Name NVARCHAR(255) null,
> Habitat NVARCHAR(255) null,
> IsPredator BIT null,
> WhiskerLength INT null,
> StripeCount INT null,
>
> primary key (id)
> )
>
> create table EndangeredAnimal (
> AnimalID INT not null,
>
> RedListID NVARCHAR(255) null,
> Population INT null,
> Status NVARCHAR(255) null,
>
> primary key (AnimalID)
> )
>
> My problem is that I don't want IberianLynx's properties to be in
> Animal, I need them to be in its immediate ancestor's table, i.e.
> EndangeredAnimal. Why did they end up in Animal?
>
> TIA
> v64
>
>
> --
> You received this message because you are subscribed to the Google Groups
> "nhusers" group.
> To post to this group, send email to [email protected].
> To unsubscribe from this group, send email to
> [email protected]<nhusers%[email protected]>
> .
> For more options, visit this group at
> http://groups.google.com/group/nhusers?hl=en.
>
>
--
You received this message because you are subscribed to the Google Groups
"nhusers" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/nhusers?hl=en.
