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From "Dinkar Rao (JIRA)" <j...@apache.org>
Subject [jira] Updated: (OPENJPA-843) Unnecessary version update on inverse-side of a 1-m relationship
Date Mon, 22 Dec 2008 19:32:44 GMT

     [ https://issues.apache.org/jira/browse/OPENJPA-843?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Dinkar Rao updated OPENJPA-843:
-------------------------------

    Attachment: OPENJPA-843-test.patch

> Unnecessary version update on inverse-side of a 1-m relationship
> ----------------------------------------------------------------
>
>                 Key: OPENJPA-843
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-843
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: jdbc
>    Affects Versions: 2.0.0
>            Reporter: Dinkar Rao
>            Priority: Minor
>         Attachments: OPENJPA-843-test.patch, OPENJPA-843.patch
>
>
> A Customer has 1-m relationship to Inventory:
> @Entity
> Customer {
>     ....
>     @OneToMany(mappedBy="customer")
>     private Collection<Inventory> inventories = new ArrayList<Inventory>();
>     ....
> }
> @Entity
> Inventory {
>     ...
>     @ManyToOne
>     private Customer customer;
>     ...
> }
> When an Inventory instance is modified, its version is bumped as expected.  However,
when an Inventory is added or deleted from the Inventory list in Customer, the Customer instance
version is unnecessarily bumped up. According to section 3.4.2 of the 1.0 spec,
> "The version attribute is updated by the persistence provider runtime when the object
is 
> written to the database. All non-relationship fields and properties and all relationships

> owned by the entity are included in version checks."
> When additions or deletions are made to the Inventory list of Customer, the version of
the Customer instance should remain unchanged. As the inverse-side, Customer does not own
the Inventory that is added/deleted. 

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