Compound Primary Key

[mini mehta]

Does the compound primary key class fields need to be subset of the CMP fields defined in the bean class?

[Nathaniel Stoddard]

Yes.

[mini mehta]

Well but if you look at HFE 672 Q46, it doesn't thinks "Primary key fields must be cmp-fields"

[Suman Sarker]

Hi Mini,

Well but if you look at HFE 672 Q46, it doesn't thinks "Primary key fields must be cmp-fields"

Lets see what the spec says about compound primary keys (spec p203 section 10.8.2)

The names of the fields in the primary key class must be a subset of the names of the container-managed fields.

So, now you know that answer to Q46 in HFE is incorrect.
Hope this helps
Suman

[mini mehta]

Thanks Suman. I believed what you said in the answer until I saw this answer in HFE with an explaination. But thanks for confirming the fact.