How to unload Relationship collection in spring data?-CodePudding

I have entity Participant

public class Participant extends AbstractParticipant
{
    ...

    @OneToMany(fetch = FetchType.LAZY, mappedBy = "participant")
    private List<MediaCallParticipant> mediaCallParticipant = new LinkedList<>();
    
    @OneToMany(fetch = FetchType.LAZY, mappedBy = "participant")
    private List<AudioCallParticipant> audioCallParticipant = new LinkedList<>();
}

I'm writing a test. Where I do participantRepository.findOne(...) But in the test I can't get a LazyLoadException with participant.getAudioCallParticipant() or participant.getMediaCallParticipant(). I have written code that is ready to Lazy exception. but this collections are always load in entity. Is it possible to somehow manually "unload" the collections?

CodePudding user response：

Your code is supposed to work. If you need to do this in a test, try this code

        // init here another context

        TestTransaction.start();
        participant = participantRepository.findOne(participant);
        getSessionFactory().getStatistics().clear();
        participant.getMediaCallParticipant();

        //assert
        assertThat(getStatistics().getPrepareStatementCount(),is(1L));

CodePudding user response：

Detach entity or close the session before call participant.getAudioCallParticipant() (you will get the same result).
Ths is because lazy associations cannot be fetched for the detached entities.