Support cascading save in Micronaut JDBC

Hi, I am not able to save 2 related tables with Micronaut but maybe it’s just something I am doing wrong. Could you please advise?

I have a parent entity

@Entity
public class ManagedComponentInstance {

    @Id
    @AutoPopulated
    private UUID id;

    @OneToMany(mappedBy = "managedComponentInstance",
            cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    private List<ManagedComponentInstanceLabel> labels;
...
}

and a child entity

@Entity
public class ManagedComponentInstanceLabel {

    @Id
    @AutoPopulated
    private UUID id;

    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "managed_component_instance_id")
    private ManagedComponentInstance managedComponentInstance;
...
}

One Instance should have multiple Labels, so it’s one-to-many relation.

I was expecting that after adding Labels to Instance (via setLabels(listWithLabels)) and calling InstanceRepository.save(), that Micronaut Data would also save labels. This is not the case, however. I have tried saving labels prior to saving instance but they are saved with managed_component_instance_id == null even though I do set parent on the entity before saving.

I’ve also tried using Micronaut annotations but the behaviour was the same.

@MappedEntity
public class ManagedComponentInstance {

    @Id
    @AutoPopulated
    private UUID id;

    //    @Relation(value = Relation.Kind.ONE_TO_MANY, mappedBy = "managedComponentInstance")
    @Relation(value = Relation.Kind.ONE_TO_MANY)
    private List<ManagedComponentInstanceLabel> labels;
...
}

@MappedEntity
public class ManagedComponentInstanceLabel {

    @Id
    @AutoPopulated
    private UUID id;

    @MappedProperty(value = "managed_component_instance_id")
    @Relation(Relation.Kind.MANY_TO_ONE)
    private ManagedComponentInstance managedComponentInstance;
...
}

I am using Micronaut Data JDBC.

Is cascading saves like this unsupported? If it should work, is there a problem with my code above? There are some examples in documentation but a complete working example would be nice.

Thanks.

[matt-snider]

@graemerocher I added #815

[graemerocher]

Basic support for cascading saves if you declare

@OneToMany(cascade = CascadeType.PERSIST)
    private List<Page> pages = new ArrayList<>();

Has been added in master. Cascading deletes have to be done manually still, that is probably a separate issue.