[Hibernate-issues] [Hibernate-JIRA] Commented: (HB-516) 2.1RC1 breaks some Middlegen generated files w/ foreign keys

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

The following comment has been added to this issue:

     Author: Gavin King
    Created: Tue, 2 Dec 2003 8:12 PM
       Body:
Looks like the problem is probably to do with this mapping:

<key-many-to-one name="qwbFldrClmn" 
     class="testQwb.hibernate.persistent.QwbFldrClmn" 
     column="FLDR_CLMN_NUM">
     <column name="FLDR_CLMN_NUM" />
</key-many-to-one>

which is actually broken, since you aren't meant to combine column attributes with column elements. perhaps the Hibernate core should do a bit better exception checking of this.
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  http://opensource.atlassian.com/projects/hibernate/secure/ViewIssue.jspa?key=HB-516


Here is an overview of the issue:
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        Key: HB-516
    Summary: 2.1RC1 breaks some Middlegen generated files w/ foreign keys
       Type: Bug

     Status: Unassigned
   Priority: Major

    Project: Hibernate2
 Components: 
             toolset
   Versions:
             2.1 rc1

   Assignee: 
   Reporter: Daniel Rosenbaum

    Created: Tue, 2 Dec 2003 4:56 PM
    Updated: Tue, 2 Dec 2003 8:12 PM
Environment: 2.1RC1 with Oracle

Description:
I have two tables, QWB_EXTRCT_VW_CLMN and QWB_FLDR_CLMN. QWB_EXTRCT_VW_CLMN has a composite primary key with columns EXTRCT_VW_NUM and FLDR_CLMN_NUM, FLDR_CLMN_NUM being a foreign key to the (single) primary key of the QWB_FLDR_CLMN table. 

Middlegen generates the following mapping for QwbFldrClmn: 

<composite-id name="comp_id" class="testQwb.hibernate.persistent.QwbExtrctVwClmnPK"> 
<meta attribute="field-description"> 
@hibernate.id 
generator-class="assigned" 
</meta> 
<!-- uni-directional one-to-one association to QwbFldrClmn --> 
<key-many-to-one 
name="qwbFldrClmn" 
class="testQwb.hibernate.persistent.QwbFldrClmn" 
> 
<column name="FLDR_CLMN_NUM" /> 
</key-many-to-one> 
<!-- bi-directional many-to-one association to QwbExtrctVw --> 
<key-many-to-one 
name="qwbExtrctVw" 
class="testQwb.hibernate.persistent.QwbExtrctVw" 
> 
<column name="EXTRCT_VW_NUM" /> 
</key-many-to-one> 
</composite-id> 

However when run the following exception is thrown: 

net.sf.hibernate.MappingException: Foreign key (QWB_EXTRCT_VW_CLMN [FLDR_CLMN_NUM])) must have same number of columns as the reference primary key (QWB_FLDR_CLMN [FLDR_NUM,FLDR_CLMN_NUM]) 

at net.sf.hibernate.mapping.ForeignKey.setReferencedTable(ForeignKey.java:60) 

at net.sf.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:625) 

at net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:719) 

at org.ifmc.qw.hibernate.HibernateSession.init(HibernateSession.java:44) 

at testQwb.hibernate.TestHibernate3.main(TestHibernate3.java:22) 


Note that this xml works with the 2.1 beta 6, but not with RC1. 

Is Middlegen not putting something in? 

BTW in general I am having a heck of a time migrating from 2.1 Beta 6 to RC1 using Middlegen created XML files. Seems to me to be a good idea to do more testing with Middlegen and Hibernate to make sure the generated files work. Or else modify Hibernate or Middlegen so they would cooperate better. 

Also please note that this is NOT the same problem as with HB-512, I am already using the patched code but yet I now have this new error.

Thanks, 
Daniel


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