public record CustomerRef(String value) {

    /** A Spring Data reading converter for {@link CustomerRef} */
    @ReadingConverter
    public class StringToCustomerRefConverter implements Converter<String, CustomerRef> {
        @Override
        public CustomerRef convert(String source) {
            return new CustomerRef(source);
        }
    }

    /** A Spring Data writing converter for {@link String} */
    @WritingConverter
    public class CustomerRefToStringConverter implements Converter<CustomerRef, String> {
        @Override
        public String convert(CustomerRef source) {
            return source.value();
        }
    }
}

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Customer {
    @Id
    private UUID id;
    @Valid
    private CustomerRef ref;
    private String name;
}

@Repository
public interface CustomerRepository extends CrudRepository<Customer, UUID> {

    Optional<Customer> findOneByRef(CustomerRef ref);
}

    Caused by: org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract java.util.Optional com.github.manosbatsis.primitive4j.sample.mvcjdbc.customer.CustomerRepository.findOneByRef(com.github.manosbatsis.primitive4j.sample.mvcjdbc.customer.CustomerRef); Reason: Cannot query by nested entity: ref
        at org.springframework.data.repository.query.QueryCreationException.create(QueryCreationException.java:101) ~[spring-data-commons-3.4.3.jar:3.4.3]
        at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lookupQuery(QueryExecutorMethodInterceptor.java:120) ~[spring-data-commons-3.4.3.jar:3.4.3]
        at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.mapMethodsToQuery(QueryExecutorMethodInterceptor.java:104) ~[spring-data-commons-3.4.3.jar:3.4.3]
        at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lambda$new$0(QueryExecutorMethodInterceptor.java:92) ~[spring-data-commons-3.4.3.jar:3.4.3]
        at java.base/java.util.Optional.map(Optional.java:260) ~[na:na]
        at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.<init>(QueryExecutorMethodInterceptor.java:92) ~[spring-data-commons-3.4.3.jar:3.4.3]
        at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:440) ~[spring-data-commons-3.4.3.jar:3.4.3]
        at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$4(RepositoryFactoryBeanSupport.java:350) ~[spring-data-commons-3.4.3.jar:3.4.3]
        at org.springframework.data.util.Lazy.getNullable(Lazy.java:135) ~[spring-data-commons-3.4.3.jar:3.4.3]
        at org.springframework.data.util.Lazy.get(Lazy.java:113) ~[spring-data-commons-3.4.3.jar:3.4.3]
        at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:356) ~[spring-data-commons-3.4.3.jar:3.4.3]
        at org.springframework.data.jdbc.repository.support.JdbcRepositoryFactoryBean.afterPropertiesSet(JdbcRepositoryFactoryBean.java:198) ~[spring-data-jdbc-3.4.3.jar:3.4.3]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1859) ~[spring-beans-6.2.3.jar:6.2.3]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1808) ~[spring-beans-6.2.3.jar:6.2.3]
        ... 125 common frames omitted
    Caused by: java.lang.IllegalArgumentException: Cannot query by nested entity: ref
        at org.springframework.data.jdbc.repository.query.JdbcQueryCreator.validateProperty(JdbcQueryCreator.java:151) ~[spring-data-jdbc-3.4.3.jar:3.4.3]
        at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[na:na]
        at org.springframework.data.jdbc.repository.query.JdbcQueryCreator.validate(JdbcQueryCreator.java:130) ~[spring-data-jdbc-3.4.3.jar:3.4.3]
        at org.springframework.data.jdbc.repository.query.PartTreeJdbcQuery.<init>(PartTreeJdbcQuery.java:114) ~[spring-data-jdbc-3.4.3.jar:3.4.3]
        at org.springframework.data.jdbc.repository.support.JdbcQueryLookupStrategy$CreateQueryLookupStrategy.resolveQuery(JdbcQueryLookupStrategy.java:127) ~[spring-data-jdbc-3.4.3.jar:3.4.3]
        at org.springframework.data.jdbc.repository.support.JdbcQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JdbcQueryLookupStrategy.java:257) ~[spring-data-jdbc-3.4.3.jar:3.4.3]
        at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.lookupQuery(QueryExecutorMethodInterceptor.java:116) ~[spring-data-commons-3.4.3.jar:3.4.3]
        ... 137 common frames omitted