https://answers.axonivy.com/questions/1039/composite-primary-key-in-persistence<p>Hi</p> <p>Is there any way to have multiple ID's in one Entity? Corresponding JPA it should be possible. But trying in the designer I get: Exaclty one 'Id' field per Entity Class must be used. Although it is not named 'Id'. Would be saving a lot of work, when this is enabled.</p> <p>Best Regards</p> <p>Alexis</p>enTue, 18 Nov 2014 17:39:50 -0500https://answers.axonivy.com/questions/1039/composite-primary-key-in-persistence/1040<p>To get the full feature set of JPA I copied the generated entity class from "src_dataClasses" to the "src" directory (with package directories) and deleted the entity class in Axon.ivy.</p> <p>Now I can manage the entity classes in pure java. Also the "Generate Schema" button in the Persistence screen is working.</p>HaraldWeberTue, 18 Nov 2014 17:39:50 -0500https://answers.axonivy.com/questions/1039/composite-primary-key-in-persistence/1040