failed to lazily initialize a collection of role: could not initialize proxy - no Session

Question

I've tried to resolve this error using advise I found from other threads such as annotating the function with @transactional, however this seems to have no effect. I've also tried using Hibernate.initialize(), but I then receive the error, "collection is not associated with any session".

I'm not the best with Java so I'd really appreciate explanations which are easily followable.

@Component
public class ItemEdmEntityConverter implements EdmEntityConverter<Item> {
    private final ItemVersionDao itemVersionDao;
    private final PolicyDao policyDao;
    private final ClaimDao claimDao;

    @Autowired
    public ItemEdmEntityConverter(ItemVersionDao itemVersionDao, PolicyDao policyDao, ClaimDao claimDao) {
        this.itemVersionDao = itemVersionDao;
        this.policyDao = policyDao;
        this.claimDao = claimDao;
    }

    @Override
    public Entity toEdmEntity(Item domainEntity) {
        Entity entity = new Entity();
        addPrimitiveEdmProperty(entity, ID, domainEntity.getId());
        addPrimitiveEdmProperty(entity, IS_PROOF_COMPLETED, getIsProofCompleted(domainEntity));
        return entity;
    }

    @Transactional
private boolean getIsProofCompleted(Item domainEntity) {
    Hibernate.initialize(domainEntity.getEvidence());

    String[] requiredProof = new String[]{
            Evidence.EvidenceType.PROOF_OF_DEVICE.toString(),
            Evidence.EvidenceType.PROOF_OF_PURCHASE.toString()
        };

    Set<Evidence> allEvidence = domainEntity.getEvidence();
    for (Evidence evidence : allEvidence) {
        ArrayUtils.removeElement(requiredProof, evidence.getEvidenceType().toString());
    }
    return requiredProof.length == 0;
}

Config

@Configuration
@EnableTransactionManagement
public class AdaptersConfig {
@Autowired
private RestrictionsParser restrictionsParser;
@Autowired
private SortParser sortParser;

@Bean
public EdmEntityAdapterReader<Long> 
  evidenceEdmEntityAdapterReaderDelegatee(EvidenceDao evidenceDao, RestrictionsParser restrictionsParser, SortParser sortParser, ToEdmEntityConverter<Evidence> evidenceToEdmEntityConverter) {
    return new EdmEntityAdapterReaderImpl<>(Evidence.class, evidenceDao, restrictionsParser, sortParser, evidenceToEdmEntityConverter);
  }
}

org.springframework.transaction.annotation.Transactional; Is that correct? — user7862512, Nov 09 '17 at 15:53
Actually, the problem is that you cannot call the method called `@Transactional` from the same class because `@Transactional` behavior is added by dynamic proxies. — Arnaud Denoyelle, Nov 09 '17 at 15:57
See [this question](https://stackoverflow.com/questions/3423972/spring-transaction-method-call-by-the-method-within-the-same-class-does-not-wo). I will hence close this question as a duplicate. — Arnaud Denoyelle, Nov 09 '17 at 15:58
Right, I've heard that before. I've tried adding @Transactional to the toEdmEntity() method (which is called outside the class), but that doesn't work either. — user7862512, Nov 09 '17 at 15:59
Does `toEdmEntity()` belong to a bean that has been injected or does it belong to a class instantiated with a `new`? — Arnaud Denoyelle, Nov 09 '17 at 16:02
I've added the bean config that I call toEdmEntity() from. Although I can't see any bean for the ToEdmEntityConverter class which contains the toEdmEntity() method. — user7862512, Nov 09 '17 at 16:21

failed to lazily initialize a collection of role: could not initialize proxy - no Session

0 Answers0