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JavaRanch » Java Forums » Databases » Object Relational Mapping
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many-to-one relationship to non-PK field

Tony Morris
Ranch Hand

Joined: Sep 24, 2003
Posts: 1608
I'm trying to declare a foreign key relationship between two entities where the type is java.lang.String and the related entity field is not a primary key but is a unique field. If I attempt the same thing, but relating to a primary key field (by leaving off the property-ref attribute which defaults to the id), I have no problem.

I have narrowed down a test case in an attempt to solve this problem but to no avail. The problem is that 'schemaexport' will generate the two tables X and Y but will not create the relationship and I don't understand why (also, why it does the create the relationship when relating to a PK field). I am using the Microsoft type 4 driver for MS SQL Server 2000.

Please find below two source files annotated with XDoclet and corresponding mapping files. Any assistance is most appreciated.









Tony Morris
Java Q&A (FAQ, Trivia)
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: many-to-one relationship to non-PK field
 
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