Message:
A new issue has been created in JIRA.
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View the issue:
http://opensource.atlassian.com/projects/hibernate/secure/ViewIssue.jspa?key=HB-175
Here is an overview of the issue:
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Key: HB-175
Summary: One-to-many association does not correctly discriminate when a subclass is specified
Type: Bug
Status: Unassigned
Priority: Major
Project: Hibernate2
Components:
core
Versions:
2.0.1
Assignee:
Reporter: Peachawat Peachavanish
Created: Thu, 10 Jul 2003 1:49 PM
Updated: Thu, 10 Jul 2003 1:49 PM
Environment: Gentoo Linux, Sun Java 1.4.1
Description:
When using one-to-many association from 'Parent' to 'SubChild_1' and 'SubChild_2' where 'SubChild_1' and 'SubChild_2' are subclasses of 'Child', the generated SQL for hydrating a 'Parent' does not appropriate include 'where' clause to discriminate 'SubChild_1' or 'SubChild_2'.
Class Declaration
=================
'Child.java'
public abstract class Child{}
'SubChild_1.java'
public class SubChild_1 extends Child {}
'SubChild_2.java'
public class SubChild_2 extends Child {}
'Parent.java'
public class Parent {
private List subChilds_1 = new ArrayList();
private List subChilds_2 = new ArrayList();
}
Mapping
=======
'Child.hbm.xml'
<?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>
<class name="Child" discriminator-value="_">
<id name="id">
<generator class="native"/>
</id>
<discriminator column="CHILDTYPE"/>
<property name="aProperty"/>
<subclass name="SubChild_1" discriminator-value="1"/>
<subclass name="SubChild_2" discriminator-value="2"/>
</class>
</hibernate-mapping>
'Parent.hmb.xml'
<?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>
<class name="Parent">
<id name="id">
<generator class="native"/>
</id>
<property name="aProperty"/>
<list name="subChilds_1" lazy="false" cascade="all">
<key column="parent_id"/>
<index column="idx"/>
<one-to-many class="SubChild_1"/>
</list>
<list name="subChilds_2" lazy="false" cascade="all">
<key column="parent_id"/>
<index column="idx"/>
<one-to-many class="SubChild_2"/>
</list>
</class>
</hibernate-mapping>
Generated SQL when perform session.find()
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Hibernate: select child0_.id as id__, child0_.idx as idx__, child0_.id as id from Child child0_ where child0_.parent_id=?
There is no 'where CHILDTYPE=?' discriminating clause.
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