"mappedBy reference an unknown target entity property" Hibernate, ManyToMany

Question

I tried to make a DB for my program using Maven framework. However, I got this kind of error.

Invocation of init method failed; nested exception is org.hibernate.AnnotationException: mappedBy reference an unknown target entity property: tugas1.sidok.model.Jadwal_JagaModel.jadwal_jaga in tugas1.sidok.model.DokterModel.jadwal

This is my following program for DokterModel and Jadwal_JagaModel

DokterModel.Java

@Entity
@Table(name = "dokter")
public class DokterModel implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "dokter_id")
    private long idDokter;

    @Size(max = 255)
    @Column(name = "NIP", nullable = false)
    private String nip;

    @Size(max= 255)
    @Column(name="NIK", nullable = false)
    private String nik;

    @Size(max = 255)
    @Column(name = "nama", nullable = false)
    private String nama;

    @Column(name = "tanggal_lahir", nullable = false)
    private Date tanggalLahir;

    @Column (name = "jenis_kelamin", nullable = false)
    private Boolean jenisKelamin;

    @Size(max = 255)
    @Column (name = "tempat_lahir")
    private String tempatLahir;

    @ManyToMany(mappedBy = "jadwal_jaga")
    private List<Jadwal_JagaModel> jadwal;

    //Setter getter //

Jadwal_JagaModel.Java

@Entity
@Table(name = "jadwal_jaga")
public class Jadwal_JagaModel {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "jadwal_jaga_id")
    private long id;

    @Size(max = 255)
    @Column(name = "hari", nullable = false)
    private String hari;

    @ManyToMany(cascade = {CascadeType.ALL})
    @JoinTable(
            name = "Dokter_Jadwal_Jaga",
            inverseJoinColumns = {@JoinColumn(name = "dokter_id", referencedColumnName = "dokter_id")},
            joinColumns = {@JoinColumn(name = "jadwal_jaga_id",referencedColumnName = "jadwal_jaga_id")}
    )
    private List<DokterModel> jadwalDokters;

// Setter getter //

I am aware that the problem is mappedBy within the DokterModel.Java, however, I am not sure on what should it be and how does mappedBy work? This is my first time on using Hibernate, so any kind of help is appreciated.

score 1 · Accepted Answer · answered Oct 15 '19 at 10:01

1

You should change mapped by code like this:

@ManyToMany(mappedBy = "jadwalDokters")
private List<Jadwal_JagaModel> jadwal;

for more about this problem look here.

answered Oct 15 '19 at 10:01

Hadi Moloodi

639
7
12

It works! However, how do I know that the name supposed to be "jadwalDokters"? – Gagak Oct 15 '19 at 10:06
It must be the same as your field name where you define your real relation. in your example, you defined @ManyToMany relation on your jadwalDokters filed in your Jadwal_JagaModel Class so wherever you want to reference this relation you must mapped it by "jadwalDokters" . – Hadi Moloodi Oct 15 '19 at 10:08

"mappedBy reference an unknown target entity property" Hibernate, ManyToMany

1 Answers1