[Hibernate-issues] [Hibernate-JIRA] Closed: (HB-299) Reuse of primary key in one-to-one realtion with subclasses

[<leg...@at...>]

Message:

   The following issue has been closed.

   Resolver: Max Rydahl Andersen
       Date: Fri, 29 Aug 2003 5:32 AM

this is alreday implemented in cvs
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View the issue:

  http://opensource.atlassian.com/projects/hibernate/secure/ViewIssue.jspa?key=HB-299


Here is an overview of the issue:
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        Key: HB-299
    Summary: Reuse of primary key in one-to-one realtion with subclasses
       Type: Bug

     Status: Closed
   Priority: Minor
 Resolution: FIXED

    Project: Hibernate2
 Components: 
             core
   Fix Fors:
             2.1
   Versions:
             2.0rc2
             2.1
             2.0 final
             2.0.1
             2.0.2
             2.0.3
             2.1 beta 1
             2.1 beta 2

   Assignee: 
   Reporter: Johan Granlund

    Created: Fri, 29 Aug 2003 4:50 AM
    Updated: Fri, 29 Aug 2003 5:32 AM
Environment: Doesn't matter

Description:
In a flight planning system. I got three entities, Staion, Leg and Movement. A Leg is a combination of a Departure and a Arrival. Departure and Arrival are subclasses of Movement. Movement has a relation to Station and holds a time.

Leg has one one-to-one relation with Arrival and one one-to-one relation with Departure.

Since hibernate force you to reuse the primary key in one-to-one relations tou can't setup above since Departue and Arrival shares the same table.

This is just one example when reuse of primary keys is annoying even worse is when you use composite primary keys.



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