[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3181) Legacy databases: Advanced handling of missing foreign key values

[Max Rydahl Andersen (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-3181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_29792 ] 

Max Rydahl Andersen commented on HHH-3181:
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e.g. what do you think will happen if you set some property on your dummy object when hibernates flushes the session...it would try and update the row but it is not there..and boom.

> Legacy databases: Advanced handling of missing foreign key values
> -----------------------------------------------------------------
>
>                 Key: HHH-3181
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3181
>             Project: Hibernate3
>          Issue Type: New Feature
>    Affects Versions: 3.2.6
>         Environment: Hibernate 3.2.6
> Oracle 10i (irrelevant)
>            Reporter: Heinz Huber
>         Attachments: not-found-keep.zip
>
>
> "keep" as valid value for attribute not-found of many-to-one/many.
> Effect: If the referenced object can't be found, a dummy object with the given key is constructed.
> Example: Account.currency contains the value XYZ. This currency can't be found in the corresponding code table. After loading the account contains a currency object XYZ nontheless.
> Extent:
> src/org/hibernate/hibernate-mapping-3.0.dtd
> src/org/hibernate/cfg/HbmBinder.java
> src/org/hibernate/engine/ForeignKeys.java
> src/org/hibernate/mapping/ManyToOne.java
> src/org/hibernate/mapping/OneToMany.java
> src/org/hibernate/type/EntityType.java
> src/org/hibernate/type/ManyToOneType.java
> src/org/hibernate/type/OneToOneType.java
> src/org/hibernate/type/TypeFactory.java
> There are some TODOs left:
> - The handling of proxies should be improved.
> - Currently works only per target entity (see comment in test).
> But it works for 

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