[hibernate-issues] [Hibernate-JIRA] Resolved: (HHH-6143) ElementCollection in Embeddable in Entity is ignored on merge

[Gail Badner (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-6143?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gail Badner resolved HHH-6143.
------------------------------

    Resolution: Duplicate
      Assignee: Gail Badner

> ElementCollection in Embeddable in Entity is ignored on merge
> -------------------------------------------------------------
>
>                 Key: HHH-6143
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6143
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.6.3
>         Environment: Hibernate EntityManager 3.6.3, HSQLDB 2.0.0
>            Reporter: Andy Schlaikjer
>            Assignee: Gail Badner
>         Attachments: merge-embedded-elementcollection.zip
>
>
> *Overview*
> When an {{@ElementCollection}} field {{ec}} is defined within an {{@Embeddable}} type {{C}}, and an {{@Embedded}} field {{em}} of type {{C}} is defined within an {{@Entity}} type {{E}}, if we create an {{E}} instance {{e}} and initialize {{e.em.ec}}, the value of {{e.em.ec}} is ignored on merge of {{e}}. Furthermore, the value is ignored even when {{ec}} has been annotated with {{@ElementCollection(fetch = FetchType.EAGER)}} and Hibernate's {{@Cascade(ALL)}}, and {{em}} has been annotated with {{@Cascade(ALL)}}.
> Disclaimer: This use case may not be required by the JPA 2.0 spec (though it'd be nice to see support):
> {quote}
> Implementations are not required to support embedded objects that are mapped across more than one table (e.g., split across primary and secondary tables or multiple secondary tables).
> {quote}
> Note: This issue may be related to HHH-5187, HHH-4135.
> *Steps to reproduce*
> # Define {{@Embeddable}} type {{ContactInfo}} with {{@ElementCollection}} field {{emailAddresses}} of type {{List<String>}}.
> # Define {{@Entity}} type {{Person}} with {{@Embedded}} field {{contactInfo}} of type {{ContactInfo}}.
> # Create a new {{Person}} instance {{p1}} and initialize {{p1.contactInfo.emailAddresses}}.
> # Use {{EntityManager}} to merge {{p1}}.
> # Use {{EntityManager}} to find {{Person}} with id matching that of {{p1}}; Init {{p2}} with result.
> # Compare {{p1}} and {{p2}}.
> .
> *Expected*
> {{Person}} instances {{p1}} and {{p2}} are identical. Specifically, {{p2.contactInfo.emailAddresses}} should not be null, and its contents should match that of {{p1.contactInfo.emailAddresses}}.
> *Observed*
> {{Person}} instances {{p1}} and {{p2}} are not equal: {{p2.contactInfo.emailAddresses}} is null. On merge of {{p1}} Hibernate is ignoring non-null {{p1.contactInfo.emailAddresses}} property value. From the source code, it looks like the {{p1.contactInfo.emailAddresses}} property value is not being copied into the EntityManager's managed instance of {{p1}} on merge.
> *Test case*
> Please see the attached Maven project for full unit test.

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