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From "Andras Szerdahelyi (Commented) (JIRA)" <>
Subject [jira] [Commented] (OPENJPA-1253) JoinColumn annotation not allowed in conjunction with *ToMany annotation
Date Tue, 11 Oct 2011 10:51:11 GMT


Andras Szerdahelyi commented on OPENJPA-1253:

for anyone who is google-ing this, i got the same exception despite being on the 2.0 spec,
the problem was the entity referred in the relationship was not listed in persistence.xml..

> JoinColumn annotation not allowed in conjunction with *ToMany annotation
> ------------------------------------------------------------------------
>                 Key: OPENJPA-1253
>                 URL:
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: jdbc
>    Affects Versions: 2.0.0-M1, 2.0.0-M2, 2.0.0-M3
>            Reporter: Rick Curtis
>            Assignee: Fay Wang
>             Fix For: 2.0.0-M3
> I receive the following exception if I have an Entity with a One(Many)ToMany relationship
with another Entity. 
> <openjpa-2.0.0-SNAPSHOT-r422266:805588 fatal user error> org.apache.openjpa.persistence.ArgumentException:
You have supplied columns for "....Entity", but this mapping cannot have columns in this context.
> To recreate the failure, add a @JoinColumn annotation to one of the *ToMany relationships
in org.apache.openjpa.persistence.jdbc.annotations.AnnoTest1. 
> example:
>     @MapKey(name = "basic")
>     @OneToMany(mappedBy = "oneManyOwner")
>     @JoinColumn(name = "asdf")
>     protected Map<String, AnnoTest2> inverseOwnerMapKey = new HashMap();
> Then run:
> trunk\openjpa-parent\openjpa-persistence-jdbc>mvn test -Dtest=org.apache.openjpa.persistence.jdbc.annotations.TestOneToMany

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