Grid items duplicate rows

Flow
1

Vaadinversion: 14.4.1


spring-boot-starter-parent: 2.2.10RELEASE

I have two items in my grid. These two items looks like:

Kontakt{id=11657f9e-c4f4-414f-aab2-618252db9b06'vorname='test1'...
Kontakt{id=8da74f38-2072-4fb0-8c74-aede661f02b5'vorname='test'...

But the grid only displays only one items and so oft like the "itemslist.size()"
Also they react as “one row”. So I can like on the first and both get selected.

These are my @Entity(s)

@Entity
@Table(name = "std_kunde")
@Data
public class Kunde extends Kontakt {

    public Kunde() {
        super();
    }

    @Override
    public String toString() {
        return super.toString();
    }
}

@Entity
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
@Data
public abstract class Kontakt extends BasicEntity {

    private String vorname;
    private String name;
    ...

   
    public Kontakt() {
        super();
    }

    @Override
    public String toString() {
        return "Kontakt{" +
                "id=" + getId() + '\'' +
                "vorname='" + vorname + '\'' +
               ...
                '}';
    }
}


@Entity
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
@Data
public abstract class BasicEntity {

    @Id
    @GenericGenerator(name = "id_generator", strategy = "....KeyGenerator")
    @GeneratedValue(generator = "id_generator")
    @Column(length = 128)
    private String id;

    @CreationTimestamp
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "create_date")
    private Date createDate;

    @UpdateTimestamp
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "modify_date")
    private Date modifyDate;

    @OneToMany(cascade = CascadeType.ALL, mappedBy = "basicEntity")
    private List<Anhang> anhangList;
    @OneToMany(cascade = CascadeType.ALL, mappedBy = "basicEntity")
    private List<Notiz> notizList;


    public BasicEntity() {
        anhangList = new ArrayList<>();
        notizList = new ArrayList<>();
    }

    @Override
    public int hashCode() {
        return Objects.hash(id);
    }

    @Override
    public boolean equals(Object o){
        if(null == o)
            return false;
        if(!(o instanceof BasicEntity))
            return false;
        BasicEntity b = (BasicEntity) o;
        return b.getId().equals(this.getId());
    }
}

And also the Grid code

 @Autowired
private KundeService kundeService;

private Grid<Kunde> g;

public Dashboard() {
    g = new Grid<>(Kunde.class);
    g.addColumn(Kunde::getVorname).setHeader("Vorname");
    g.setSizeFull();
    setSizeFull();
    add(g);
}

I tested to build a Grid based upon an other entiy and it worked like it should. Its like the first time I have this behaivor but I dont know how actually to debug it…

This is the @Entity (Notiz) which works like expected.


UI-Code

private Grid<Kunde> g;
    private Grid<Notiz> n;

    public Dashboard() {
        g = new Grid<>(Kunde.class);
        g.addColumn(Kunde::getId).setHeader("ID");
        g.addColumn(Kunde::getVorname).setHeader("Vorname");
        g.setSizeFull();

        n = new Grid<>(Notiz.class);
        n.addColumn(Notiz::getId).setHeader("ID");
        n.addColumn(Notiz::getTitel).setHeader("Titel");
        n.setSizeFull();
        setSizeFull();
        add(g,n);
    }

    @PostConstruct
    private void loadValues(){
        g.setItems(kundeService.findAll());
        n.setItems(notizService.findAll());
    }



@Entity
@Table(name = "ld_notiz")
@Data
public class Notiz extends BasicEntitySystemFeatures {


    private String titel;
    @Column(length = 5000)  //TODO
    private String content;
    private boolean abgeschlossen = false;

    @Enumerated(EnumType.STRING)
    private NOTIZ_TYP notizTyp;

    public enum NOTIZ_TYP {
        NOTIZ,
        ERINNERUNG
    }

    @ManyToOne
    private BasicEntity basicEntity;

    public Notiz() {
        super();
    }
}

@Entity
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
@Data
public abstract class BasicEntitySystemFeatures {
    @Id
    @GenericGenerator(name = "id_generator", strategy = "...KeyGenerator")
    @GeneratedValue(generator = "id_generator")
    @Column(length = 128)
    private String id;

    @CreationTimestamp
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "create_date")
    private Date createDate;

    @UpdateTimestamp
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "modify_date")
    private Date modifyDate;

    public BasicEntitySystemFeatures() {
    }

    @Override
    public int hashCode() {
        return Objects.hash(id);
    }

    @Override
    public boolean equals(Object o){
        if(null == o)
            return false;
        if(!(o instanceof BasicEntitySystemFeatures))
            return false;
        BasicEntitySystemFeatures b = (BasicEntitySystemFeatures) o;
        return b.getId().equals(this.getId());
    }
  • Below the screenshot. On top the notworking entity Kunde and on bottom the working entity Notiz

18467644.png