I think the solution for this problem is to use cascade="none" for the item
reference in SequencedItem.
ValueObject SequencedItem {
- @ItemSet itemSet <-> seqItems
Integer sequence range="min=1"
- @Item item cascade="none"
}
/Patrik
greatfooty wrote:
>
> I'm having problems with the following btdesign :
>
> Application MyApp {
> basePackage=org.testsculpt
>
> Module seqitem {
>
> Entity ItemSet {
> scaffold
> String name key
> - Bag<@SequencedItem> seqItems orderby="sequence asc"
> cascade="all-delete-orphan" <-> itemSet
> }
>
> ValueObject SequencedItem {
> - @ItemSet itemSet <-> seqItems
> Integer sequence range="min=1"
> - @Item item
> }
>
> Entity Item {
> scaffold
> String name key
> String title
> String content
>
> Repository ItemRepository {
> findAll hint="orderBy=name, orderByAsc=true";
> }
> }
> }
> }
>
> I've generated with no custom code nor additions to the generated gui and
> then using the GUI i do the following:
>
> #1. create a few Items
> #2. create an ItemSet (without including any sequencedItems)
> #3. list the ItemSets and select the one just created at #2 for update
> #4. as part of update i create a sequencedItem (using either of the Items
> created at #1)
> #5. then on trying to persist updates for the ItemSet I get the following:
>
> System error
> (org.fornax.cartridges.sculptor.framework.errorhandling.DatabaseAccessException),
> caused by: org.springframework.orm.jpa.JpaSystemException:
> org.hibernate.PersistentObjectException: detached entity passed to
> persist: org.testsculpt.seqitem.domain.Item; nested exception is
> javax.persistence.PersistenceException:
> org.hibernate.PersistentObjectException: detached entity passed to
> persist: org.testsculpt.seqitem.domain.Item
>
> I've tried this now with sculptor 1.8 but get same problem under 1.7
>
> As background to why i'm desiging the data like this, see old post:
>
> http://old.nabble.com/Re-ordering-a-related-List-of-entities--td26296763s17564.html
> Re-ordering-a-related-List-of-entities You'll see that EntityA is
> ItemSet, EntityB is Item and EntityABRelation is SequencedItem except that
> I've made relation one-way 1-1 from SequencedItem to Item.
>
> Whenever order needs to be changed I'm intending to reorder the seqItems
> by updating the 'sequence' attribute on all affected SequencedItem
> instances. Haven't got to trying that yet as the above problem has me
> first wondering if i can use this datastructure. Note too i've taken this
> approach in preference to one suggestion which was storing an ordered list
> of ids onto ItemSet - that approach would've given me a ref integrity
> problem when trying to remove an Item that may be ref'd within multiple
> ItemSets.
>
> The custom ui for this item re-ordering is to be a richfaces listshuttle
> as per:
>
>
> http://livedemo.exadel.com/richfaces-demo/richfaces/listShuttle.jsf;jsessionid=C54CFAEDFE2FB0DFFD479E3DD69E6019?c=listShuttle&tab=usage
> ListShuttle
>
> In fact once I've managed to use sculptor for this I'd ideally like to
> bundle up this functionality to somehow introduce a new domain generation
> pattern for auto-creation of such a sequencing entity (similar to present
> many-many resolver but with a seq value included). I have many other
> scenarios where the same pattern is needed.
>
> Any suggestions gratefully accepted re the persistence problem OR any
> other approaches that you could see to modelling the data to suit the
> listshuttle.
>
>
--
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