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Re: [eclipselink-users] Cascading entities
|
Please include the mappings/annotations that you currently have.
Because the description has a composite primary key, you will need to define
a PrimaryKeyClass.
Refer to,
http://en.wikibooks.org/wiki/Java_Persistence/Identity_and_Sequencing#Composite_Primary_Keys
and,
http://en.wikibooks.org/wiki/Java_Persistence/Identity_and_Sequencing#Primary_Keys_through_OneToOne_Relationships
Using a primary key from a ManyToOne can be a little complex in JPA 1.0, but
it is simpler in JPA 2.0 as you can put @Id on a ManyToOne (EclipseLink
2.0).
Chr|stian wrote:
>
> Hello there smart and beautiful people :-)
> I'm somewhat embarrassed to ask this question, but come to the
> conclusion that banging ones head into the wall is a useless pastime.
>
> I'm having some difficulty updating one of my entities that is inside
> yet another entity. I have several types of these, but here's an example:
>
> I have two tables, categories and categories_description, the latter
> holds i18n-versions of the category name, it's description etc.
>
> Now the categories_description has a composite key based on an
> categoryID and a languageID, now I can read from the database with no
> real problem, however when it comes to updating the buggers I'm at a
> loss. The categoryID is ofcourse the primary key of the categories-table.
>
> So basicly I'm wondering what kind of steps do I need to take to be able
> to update a category and it's descriptions? I've already tried to use
> the Cascading-type ALL.
>
> Is it required to create a PrimaryKeyClass to control this?
>
>
> (and I can't change the structure of the database as it's defined by an
> open source project ;)
>
> --
> Regards
> Christian Michelsen
> _______________________________________________
> eclipselink-users mailing list
> eclipselink-users@xxxxxxxxxxx
> https://dev.eclipse.org/mailman/listinfo/eclipselink-users
>
>
-----
http://wiki.eclipse.org/User:James.sutherland.oracle.com James Sutherland
http://www.eclipse.org/eclipselink/
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