Spring Data JPA - how to set transient fields after retrieval

Question

After an entity is fetched using the JpaRepository methods of Spring Data JPA, e.g. findOne, findBy..., etc., I was wondering what would b

Answer 1

You can use @Access(AccessType.Property) for setting transient fields ideally.

You have to mention @Access(AccessType.Property) on the setter method normally and then you can set value of that transient field in that setter method.

Alternatively in case of repositories , you can very well write a JPQL something like this.

@Query("SELECT new Hello(a.x*a.y,a.x,a.y)FROM Hello a WHERE t.value = :value")

and then in the constructor set the value of this transient variable with a.x*a.y