I saw that the ID type is defined in every JPA table. Is it mandatory?
Or is there any option that I can get class without the ID member?
I saw that the ID type is defined in every JPA table. Is it
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I saw that the ID type is defined in every JPA table. Is it mandatory?
Or is there any option that I can get class without the ID member?
Id(i.e. primary key) is mandatory in JPA. As JSR317(Java Persistence API, which could be downloaded here) chapter 2.4 said(first sentence):
BTW, besides
Idannotation, one can also useEmbeddedIdannotation for composite primary keys.