@Table Class supports Record (or AllArgsConstructor), but does not support @Transient.

[seminchoi]

When using Persistable with a record class in an R2DBC Data Repository, I found that the record does not work properly with the @Transient annotation.

Here is a sample code:

@Table("sample")
@Builder
public record SampleRecord(
        @Id
        UUID id,

        @Transient
        boolean isNew
) implements Persistable<UUID> {
    @Override
    public UUID getId() {
        return id;
    }

    @Override
    public boolean isNew() {
        return isNew;
    }
}

public interface SampleRecordRepository extends R2dbcRepository<SampleRecord, UUID> {
}

And the test code:

@SpringBootTest
class Simpler2dbcPersistableExampleApplicationTests {
    @Autowired
    SampleRecordRepository sampleRecordRepository;

    @Test
    void recordTest() {
        UUID sampleId = UUID.randomUUID();

        SampleRecord sample = SampleRecord.builder()
                .id(sampleId)
                .isNew(true)
                .build();

        sampleRecordRepository.save(sample)
                .then(sampleRecordRepository.findById(sampleId))
                .block();
    }
}

Running this test produces the following error:

Required property name not found for class com.sem.simpler2dbcpersistableexample.Sample2
java.lang.IllegalStateException: Required property name not found for class com.sem.simpler2dbcpersistableexample.Sample2
	at org.springframework.data.mapping.PersistentEntity.getRequiredPersistentProperty(PersistentEntity.java:190)
	at org.springframework.data.mapping.model.InstantiationAwarePropertyAccessor$1.getParameterValue(InstantiationAwarePropertyAccessor.java:115)
	at org.springframework.data.mapping.model.ClassGeneratingEntityInstantiator.extractInvocationArguments(ClassGeneratingEntityInstantiator.java:301)
	at org.springframework.data.mapping.model.ClassGeneratingEntityInstantiator$EntityInstantiatorAdapter.createInstance(ClassGeneratingEntityInstantiator.java:273)
	at org.springframework.data.mapping.model.ClassGeneratingEntityInstantiator.createInstance(ClassGeneratingEntityInstantiator.java:98)
	at org.springframework.data.mapping.model.InstantiationAwarePropertyAccessor.setProperty(InstantiationAwarePropertyAccessor.java:106)
	at org.springframework.data.r2dbc.convert.MappingR2dbcConverter.potentiallySetId(MappingR2dbcConverter.java:471)
	at org.springframework.data.r2dbc.convert.MappingR2dbcConverter.lambda$populateIdIfNecessary$2(MappingR2dbcConverter.java:451)

After debugging the issue, I found that when creating the entity without using the default constructor, no additional actions are performed, such as injecting null values or default values, into fields annotated with @transient.

The same issue occurs with a class that only has an @AllArgsConstructor.

The issue can be reproduced at https://github.com/seminchoi/r2dbc-transient-issue

So, I was wondering if this behavior is intentional or if there are any plans to support it.

Additionally, I would like to know if I can contribute to fixing this issue. If so, could you guide me on which parts of the code I should modify?

[seminchoi]

I mistakenly created the issue in the wrong repository and have posted the same issue in the spring-data-commons repository. (spring-projects/spring-data-commons#3256) So, I would like this issue to be closed.