General Quesion Regarding ManyToOne

Hi ,
iam, using JPA/Toplink , i have a legacy Data Base and its rich of Assosiations , my question has 2 parts :
- If my Entity has a Compsite Key and one of the key members should be represented as Object of that Entity type (ManyToOne EGAR relation to retrive all the Descriptions once) , is this applicable and does not considered BAD design.
- If the answer for the first one is "YES" , how can i specify that the ManyToOne Assosiation to be considered as ID .
Thanks and Best Regards ,

This is a common model that a dependent object's primary key is composed in part by its foreign key to it owning object. Unfortunately the JPA Spec does not directly support this. In JPA you will need to create a basic attribute for the foreign key. You will also need to use an IdClass as the Entity has a composite primary key.
However you can do this through TopLink, but not through JPA annotations. You could use a DescriptorCustomizer to use the setPrimaryKeyFieldNames() of your ClassDescriptor to the composite fields.

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Message was edited by: BeSharp

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General Quesion Regarding ManyToOne

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