ClassCastException: cannot be cast to class com.querydsl.sql.RelationalPathBase

[jeusdi]

Here my generated "QEntity" class:

public class QQdCF extends EntityPathBase<QdCF> {
 // ...
}

Here my repository:

@Repository
public interface QdCFRepository extends QuerydslR2dbcRepository<QdCF, Long> {
	
}

My service:

@RequiredArgsConstructor
@Service
public class QdCFService {

	private final PresenterMapper presenterMapper;
	private final QueryMapper queryMapper;
	private final QdCFRepository qdcfRepository;
	
	public Mono<PageableResponseModel<QdCFPresenter>> getQdCFSearchQueryDsl(
		QdCFSearchFormModel form,
		Pageable pageable
	) {
		Function<List<QdCFPresenter>, PageableResponseModel<QdCFPresenter>> toResponse =
			(items) -> PageableResponseModel.<QdCFPresenter>builder().size(items.size()).page(form.getPage()).results(items).build();

		return this.qdcfRepository.findAll(this.queryMapper.toPredicate(form))
			.map(this.presenterMapper::toPresenter)
			.collectList()
			.map(toResponse);
	}

Everything is straighforward.

Nevertheless, I'm getting this error message on startup:

Caused by: java.lang.ClassCastException: class cat.gencat.clt.git.backend.model.persistency.QQdCF cannot be cast to class com.querydsl.sql.RelationalPathBase (cat.gencat.clt.git.backend.model.persistency.QQdCF and com.querydsl.sql.RelationalPathBase are in unnamed module of loader 'app')

	at com.infobip.spring.data.common.QuerydslExpressionFactory.getRelationalPathBaseFromQueryClass(QuerydslExpressionFactory.java:177) ~[infobip-spring-data-common-7.2.0.jar:na]

	at com.infobip.spring.data.common.QuerydslExpressionFactory.getRelationalPathBaseFromQueryRepositoryClass(QuerydslExpressionFactory.java:157) ~[infobip-spring-data-common-7.2.0.jar:na]

	at com.infobip.spring.data.r2dbc.QuerydslR2dbcRepositoryFactory.getRepositoryFragments(QuerydslR2dbcRepositoryFactory.java:67) ~[infobip-spring-data-r2dbc-querydsl-7.2.0.jar:na]

	at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepositoryComposition(RepositoryFactorySupport.java:436) ~[spring-data-commons-2.7.2.jar:2.7.2]

	at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:301) ~[spring-data-commons-2.7.2.jar:2.7.2]

	at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$5(RepositoryFactoryBeanSupport.java:323) ~[spring-data-commons-2.7.2.jar:2.7.2]

	at org.springframework.data.util.Lazy.getNullable(Lazy.java:231) ~[spring-data-commons-2.7.2.jar:2.7.2]

	at org.springframework.data.util.Lazy.get(Lazy.java:115) ~[spring-data-commons-2.7.2.jar:2.7.2]

	at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:329) ~[spring-data-commons-2.7.2.jar:2.7.2]

	at org.springframework.data.r2dbc.repository.support.R2dbcRepositoryFactoryBean.afterPropertiesSet(R2dbcRepositoryFactoryBean.java:179) ~[spring-data-r2dbc-1.5.2.jar:1.5.2]

	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.22.jar:5.3.22]

	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.22.jar:5.3.22]

	... 44 common frames omitted

Any ideas?

[lpandzic]

How are you generating Q classes?
You should be using https://github.com/infobip/infobip-spring-data-querydsl#AnnotationProcessor.

extends EntityPathBase

and

QuerydslR2dbcRepository

provide a hint that you're using JPA Q class generator and need R2dbc featureset.

[lpandzic]

I'm gonna close this one as stale, feel free to reopen if it still applies.