File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Object Relational Mapping and the fly likes OneToMany relationship Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login

Win a copy of The Java EE 7 Tutorial Volume 1 or Volume 2 this week in the Java EE forum
or jQuery UI in Action in the JavaScript forum!
JavaRanch » Java Forums » Databases » Object Relational Mapping
Bookmark "OneToMany relationship" Watch "OneToMany relationship" New topic

OneToMany relationship

Will Myers
Ranch Hand

Joined: Aug 05, 2009
Posts: 325

Hi I need some help in mapping a relationship...

my tables look like:

I'm trying to map the CurrencyHolidays as a set inside the Currency object like so:

but this is causing an exception:

I can't change the database schema so what am i doing wrong?
Will Myers
Ranch Hand

Joined: Aug 05, 2009
Posts: 325

so contrary to what this says you need to add

to the id column in the source entity
It is sorta covered in the JavaRanch Style Guide.
subject: OneToMany relationship