Searching An object from @ElementCollection

Question

I am using Spring Data JPA.

I an entity like this

public class A {

    @CollectionTable(name = \"B_ITEMS\", joinColumns = @JoinColumn(name = \"B_ID\"))
         


        

Answer 1

@ElementCollection is just a simple way to map a @OneToMany relation.

As such you can join them as usual:

public interface ARepo extends PagingAndSortingRepository<A, Long> {
    @Query("select a from A a join a.bs b where b.prop1 = :prop1 and ...")
    A findByProps(@Param("prop1") String prop1)
}

Answer 2

An approach could be to search a list of A objects for all the properties of B object. That means use filters for prop1, prop2 and prop3 together.

public interface ARepo extends PagingAndSortingRepository<Clinic, Long> {
    List<A> findByBsProp1AndBsProp2AndBsProp3(String prop1, String prop2, String prop3); 
}

Answer 3

You seem to be asking for a basic IN query in Spring Data - findBybsIn(List<B> bs)

Answer 4

Instead of using @Query like in @Zeromus answer you can also define it by method name (findByElementCollectionProperty_NestedProperty):

public interface ARepo extends JPARepository<A,Long> {

    List<A> findByBs_Prop1(String prop1);
}

More information how SpringData resolves nested Properties can be found under:

Query Property Expressions