The Faces scaffold does not generate any form fields for @Id annotated fields. This is because the Metawidget JPAInspector used by the scaffold plugin is configured to hide Ids.

This should however be done conditionally, when the @Id field is also annotated with a @GeneratedValue, since attempting to create a new entity instance without a provided id, results in the following error being displayed:

org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save()