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From "Maurice Bernards (JIRA)" <j...@apache.org>
Subject [jira] Commented: (OPENJPA-1607) Using unidirectional one-to-many target foreign key throws exception
Date Wed, 15 Dec 2010 07:03:01 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-1607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12971565#action_12971565
] 

Maurice Bernards commented on OPENJPA-1607:
-------------------------------------------

Hi,

I got the same problem.
I have defined the following:

@OneToMany
@JoinColumn(name = "proj_id")
private Collection<Task> tasks = new ArrayList<Task>();

When I deploy my application on a glassfish server, it is working. The deployment is correct,
no jointables are created as expected.

To ensure quality, I'm writing tests for it using OpenEJB.
I'm currently using openejb-standalone-3.2-20100914.180618-7 and replaced the openjpa with
this one: apache-openjpa-2.2.0-20101211.065431-6-binary

When I run the tests, I get the error message on every One-To-Many unidirectional relationship:

You have supplied columns for "vilauta.entity.Project.tasks", but this mapping cannot have
columns in this context.

Entity which contain no unidirectional One-To-Many fields, run without a problem.

> Using unidirectional one-to-many target foreign key throws exception
> --------------------------------------------------------------------
>
>                 Key: OPENJPA-1607
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-1607
>             Project: OpenJPA
>          Issue Type: Bug
>    Affects Versions: 2.0.0-beta3
>            Reporter: Oliver Ringel
>         Attachments: openjpa-1607.tar
>
>
> Using this simple unidirectional relationship
> @OneToMany
> @JoinColumn(name = "DEPARTMENT_ID")
> private Set<Employee> employees;
> causes to the following exception
> <openjpa-2.0.0-beta3-r422266:926797 fatal user error> org.apache.openjpa.persistence.ArgumentException:
You have supplied columns for "com.example.Department.employees", but this mapping cannot
have columns in this context.
> Unidirectional one-to-many target foreign key relationship should be supported in JPA
2.0.

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