История изменений

@MappedSuperclass
public abstract class BaseModel implements Comparable<BaseModel>, Serializable {

    @Getter
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private Long id;

    @Getter
    @Setter
    @Column(nullable = false)
    private Date createdAt;

    @Getter
    @Setter
    @Column(nullable = false)
    private Date updatedAt;

    @PrePersist
    public void prePersist(){
        createdAt = updatedAt = new Date();
    }

    @PreUpdate
    public void preUpdate(){
        updatedAt = new Date();
    }

    @Override
    public int compareTo(BaseModel o) {
        return this.getId().compareTo(o.getId());
    }

    public int hashCode() {
        return new HashCodeBuilder().append(getId()).toHashCode();
    }
}

2018-01-31 20:54:19.255 [listenerPool0-thread3] DEBUG o.s.d.r.c.s.TransactionalRepositoryProxyPostProcessor$CustomAnnotationTransactionAttributeSource - Adding transactional method 'save' with attribute: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''

@MappedSuperclass
public class BaseModel implements Comparable<BaseModel>, Serializable {

    @Getter
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private Long id;

    @Getter
    @Setter
    @Column(nullable = false)
    private Date createdAt;

    @Getter
    @Setter
    @Column(nullable = false)
    private Date updatedAt;

    @PrePersist
    public void prePersist(){
        createdAt = updatedAt = new Date();
    }

    @PreUpdate
    public void preUpdate(){
        updatedAt = new Date();
    }

    @Override
    public int compareTo(BaseModel o) {
        return this.getId().compareTo(o.getId());
    }

    public int hashCode() {
        return new HashCodeBuilder().append(getId()).toHashCode();
    }
}