12) The entity integrity rule states that:A) no primary key attribute can be null. B) referential integrity must be maintained across all entities. C) each entity must have a primary key. D) a primary key must have only one attribute. A ) no primary key attribute can be null .. "/>
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Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

Entity must not be null

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Error detail - The given id must not be null!; nested exception is java.lang.IllegalArgumentException: The given id must not be null!", } The REST API call response gives a 500 Internal Server Error because incorrect information or parameters are passed in the raw body section. Solution
The manually managed scenario will not just work out of the box. You must do your part to make this application work. The comments provided in the method explain this. Pasted below for reference: //You can create an EntityManagerFactory as shown in the code below. //If you create an EntityManagerFactory you must call the