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https://issues.apache.org/jira/browse/OPENJPA-1607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12972175#action_12972175
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Kevin Sutter commented on OPENJPA-1607:
---------------------------------------

Hmmm...  I just looked at our junits for this scenario and we have several 
tests that show that this works.  The test cases are:

o  TestContainerSpecCompatibilityOptions
o  TestSpecCompatibilityOptions

And, the corresponding entity definitions are:

o  Uni_1ToM_FK

All of the code and testcases were integrated via OPENJPA-1253.  And, the 
version references you have provided seem to indicate that you are running with 
this code base.

>From what I can tell, these tests are using the same mechanisms that your 
>tests are expecting.  Maybe you can review the OpenJPA tests to see how they 
>might differ from your scenarios?

In the mean time, I will continue to investigate as well.  Thanks.

> 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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