hello *,

how can I map a polymorphic collection with table-per-concrete-class?
E.g. I have a class Person (with a table person) with a set of pets and the classes cat and dog. The classes cat and dog extend the abstract class pet. Each person has cat's and/or dogs and each pet has exactly one person as owner.

Which example in the doc fits to this question? Do I have to use a "set" or "any"?

Thank you!

Regards Richard

Sorry, but I can't find any informations about collections on this page?

You can use <many-to-any> in Hibernate2, or, much better, a <union-subclass> mapping in Hibernate3.

I have a problem with the <many-to-any> mapping and can’t find any example in the reference doc or the “hibernate in action” book. Have I overlook it? Can I find something on the web?

Thanks Richard

chapter 6.10 reference docs

I changed the mapping file from any to many-to-any and get this error during the schema-creation:

INFO: Mapping file: hbm/ena/ui/molecule/MoleculeText.hbm.xml
Jan 19, 2005 9:38:22 PM net.sf.hibernate.cfg.Binder bindRootClass
INFO: Mapping class: ena.ui.molecule.MoleculeText -> MoleculeText
Jan 19, 2005 9:38:22 PM net.sf.hibernate.cfg.Configuration addFile
INFO: Mapping file: hbm/ena/ui/panel/MoleculePanel.hbm.xml
Jan 19, 2005 9:38:22 PM net.sf.hibernate.util.XMLHelper$ErrorLogger error
SEVERE: Error parsing XML: hbm/ena/ui/panel/MoleculePanel.hbm.xml(17) Attribute "name" must be declared for element type "many-to-any".
Jan 19, 2005 9:38:22 PM net.sf.hibernate.util.XMLHelper$ErrorLogger error
SEVERE: Error parsing XML: hbm/ena/ui/panel/MoleculePanel.hbm.xml(17) Attribute "cascade" must be declared for element type "many-to-any".
Jan 19, 2005 9:38:22 PM net.sf.hibernate.util.XMLHelper$ErrorLogger error
SEVERE: Error parsing XML: hbm/ena/ui/panel/MoleculePanel.hbm.xml(17) The content of element type "many-to-any" is incomplete, it must match "(meta-value*,column,column+)".
Jan 19, 2005 9:38:22 PM net.sf.hibernate.util.XMLHelper$ErrorLogger error

My mapping file is:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping
package="ena.ui.panel">

<class name="MoleculePanel" table="MoleculePanel" >
<id name="Id">
<generator class="native"/>
</id>
<property name="PanelTitle"/>

<many-to-any name="moleculeVector"
meta-type="string"
id-type="long"
cascade="save-update">
<meta-value value="MoleculeText" class="ena.ui.molecule.MoleculeText"/>
<meta-value value="MoleculeDate" class="ena.ui.molecule.MoleculeDate"/>
<column name="molecule_TYPE"/>
<column name="molecule_ID"/>
</many-to-any>


</class>

</hibernate-mapping>

Thank you!

Richard