[
https://issues.apache.org/jira/browse/OPENJPA-660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Fay Wang updated OPENJPA-660:
-----------------------------
Attachment: patch.txt
The attached patch fixes this problem. To load a toMany relationship, there is
normally a foreign key corresponing to the primary key in the owner class in
the where clause. The value of the primary key in the owner class is passed via
the argument sm to the load method. The parameter problem exposed by
OPENJPA-660 is the missing non-foreign key parameters. The fix is to detect any
non-FK parameters and add them to the parameter list.
> ClassCastException when using OneToMany Relation and collection is subclass
> using Discriminator with SINGLE_TABLE strategy.
> ---------------------------------------------------------------------------------------------------------------------------
>
> Key: OPENJPA-660
> URL: https://issues.apache.org/jira/browse/OPENJPA-660
> Project: OpenJPA
> Issue Type: Bug
> Components: jpa
> Affects Versions: 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.1.0, 1.1.1, 1.2.0
> Reporter: Vikram Bhatia
> Attachments: patch.txt, testInheritance.zip
>
>
> If the entity has OneToMany relation and collection is declared as subclass
> which uses SINGLE_TABLE inheritance strategy, it fetches all rows
> irrespective of Discriminator value and throws ClassCastException.
> There is entity Department (table dept) having OneToMany relation with
> another entity FullTimeEmployee.
> @OneToMany (mappedBy="dept", cascade=CascadeType.ALL)
> private Collection<FullTimeEmployee> fullTimeEmployees;
> There is abstract class Employee with
> @Inheritance(strategy=InheritanceType.SINGLE_TABLE)
> @DiscriminatorColumn(name="TYPE")
> There are two entity classes FullTimeEmployee and PartTimeEmployee which
> extends Employee (table emp) with Discriminator values 'F' and 'P'
> respectively.
> Now, suppose emp table contains 2 rows of PartTimeEmployee and 2 rows of
> FullTimeEmployee and if test class fetches Department object and calls
> dept.getFullTimeEmployees(), it throws ClassCastException as it gets 4 rows
> and doesn't use discriminator and subclass type while generating SQL query.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
