Bagaimana saya bisa bertahan dalam hubungan satu ke banyak di jpa?

Saya dapat menambahkan nilai ke database dengan tabel yang tidak memiliki kunci asing menggunakan format JSON yang dikirim melalui tukang pos, namun, saya menerima kesalahan saat memasukkan kunci asing.

Inilah kesalahan saya:

HTTP Status 500 - javax.persistence.RollbackException: java.lang.IllegalStateException: 
During synchronization a new object was found through a relationship that was not marked
cascade PERSIST: com.balay.entity.HaDetails[ hadID=null ].

Saya memasukkan:

{
"acceptedGender":"keduanya",
"harga":123123,00,
"type":"apartment",
"vacantNum":13,
" hadID":4
}

Saya menggunakan metode posting di bawah ini untuk memasukkan

Dapatkah seseorang tolong bantu saya

Ini kode saya:

@javax.ejb.Stateless
@Path("com.balay.entity.hatypes")
public class HaTypesFacadeREST extends AbstractFacade<HaTypes> {

@PersistenceContext(unitName = "BalayRSPU")
private EntityManager em;

public HaTypesFacadeREST() {
    super(HaTypes.class);
}

**@POST
@Override
@Consumes({MediaType.APPLICATION_JSON})
public void create(HaTypes entity) {
    em = 
  Persistence.createEntityManagerFactory("BalayRSPU").createEntityManager();
      try{
        em.getTransaction().begin();
        em.persist(entity);
        em.getTransaction().commit();
    }finally{
        em.close();
    }
}**

@PUT
@Path("{id}")
@Consumes({MediaType.APPLICATION_JSON})
public void edit(@PathParam("id") Integer id, HaTypes entity) {
    super.edit(entity);
}

@DELETE
@Path("{id}")
public void remove(@PathParam("id") Integer id) {
    super.remove(super.find(id));
}

@GET
@Path("{id}")
@Produces({MediaType.APPLICATION_JSON})
public HaTypes find(@PathParam("id") Integer id) {
    return super.find(id);
}

@GET
@Override
@Produces({MediaType.APPLICATION_JSON})
public List<HaTypes> findAll() {
    return super.findAll();
}

@GET
@Path("{from}/{to}")
@Produces({MediaType.APPLICATION_JSON})
public List<HaTypes> findRange(@PathParam("from") Integer from, 
@PathParam("to") Integer to) {
    return super.findRange(new int[]{from, to});
}

@GET
@Path("count")
@Produces(MediaType.TEXT_PLAIN)
public String countREST() {
    return String.valueOf(super.count());
}

@Override
protected EntityManager getEntityManager() {
    em = 
Persistence.createEntityManagerFactory("BalayRSPU").createEntityManager();
    return em;
}

}

 @Entity
 @Table(name = "ha_types")
 @XmlRootElement
 @NamedQueries({
@NamedQuery(name = "HaTypes.findAll", query = "SELECT h FROM HaTypes h")
, @NamedQuery(name = "HaTypes.findByHatID", query = "SELECT h FROM HaTypes h 
WHERE h.hatID = :hatID")
, @NamedQuery(name = "HaTypes.findByType", query = "SELECT h FROM HaTypes h 
 WHERE h.type = :type")
, @NamedQuery(name = "HaTypes.findByAcceptedGender", query = "SELECT h FROM 
HaTypes h WHERE h.acceptedGender = :acceptedGender")
, @NamedQuery(name = "HaTypes.findByVacantNum", query = "SELECT h FROM 
HaTypes h WHERE h.vacantNum = :vacantNum")
, @NamedQuery(name = "HaTypes.findByPrice", query = "SELECT h FROM HaTypes h 
WHERE h.price = :price")})
public class HaTypes implements Serializable {

private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "hatID")
private Integer hatID;
@Basic(optional = false)
@Column(name = "type")
private String type;
@Basic(optional = false)
@Column(name = "acceptedGender")
private String acceptedGender;
@Basic(optional = false)
@Column(name = "vacantNum")
private int vacantNum;
// @Max(value=?)  @Min(value=?)//if you know range of your decimal fields 
consider using these annotations to enforce field validation
@Basic(optional = false)
@Column(name = "price")
private BigDecimal price;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "hatID")
private Collection<Reservation> reservationCollection;
@JoinColumn(name = "hadID", referencedColumnName = "hadID")
@ManyToOne(optional = false)
private HaDetails hadID;

public HaTypes() {
}

public HaTypes(Integer hatID) {
    this.hatID = hatID;
}

public HaTypes(Integer hatID, String type, String acceptedGender, int 
vacantNum, BigDecimal price) {
    this.hatID = hatID;
    this.type = type;
    this.acceptedGender = acceptedGender;
    this.vacantNum = vacantNum;
    this.price = price;
}

public Integer getHatID() {
    return hatID;
}

public void setHatID(Integer hatID) {
    this.hatID = hatID;
}

public String getType() {
    return type;
}

public void setType(String type) {
    this.type = type;
}

public String getAcceptedGender() {
    return acceptedGender;
}

public void setAcceptedGender(String acceptedGender) {
    this.acceptedGender = acceptedGender;
}

public int getVacantNum() {
    return vacantNum;
}

public void setVacantNum(int vacantNum) {
    this.vacantNum = vacantNum;
}

public BigDecimal getPrice() {
    return price;
}

public void setPrice(BigDecimal price) {
    this.price = price;
}

@XmlTransient
public Collection<Reservation> getReservationCollection() {
    return reservationCollection;
}

public void setReservationCollection(Collection<Reservation> 
reservationCollection) {
    this.reservationCollection = reservationCollection;
}

public HaDetails getHadID() {
    return hadID;
}

public void setHadID(HaDetails hadID) {
    this.hadID = hadID;
}

@Override
public int hashCode() {
    int hash = 0;
    hash += (hatID != null ? hatID.hashCode() : 0);
    return hash;
}

 @Override
    public boolean equals(Object object) {
    // TODO: Warning - this method won't work in the case the id fields are 
    not set
    if (!(object instanceof HaTypes)) {
        return false;
    }
    HaTypes other = (HaTypes) object;
    if ((this.hatID == null && other.hatID != null) || (this.hatID != null 
    && !this.hatID.equals(other.hatID))) {
        return false;
    }
    return true;
}

@Override
public String toString() {
    return "com.balay.entity.HaTypes[ hatID=" + hatID + " ]";
}

}

@Entity
@Table(name = "ha_details")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "HaDetails.findAll", query = "SELECT h FROM HaDetails h")
, @NamedQuery(name = "HaDetails.findByHadID", query = "SELECT h FROM 
 HaDetails h WHERE h.hadID = :hadID")
, @NamedQuery(name = "HaDetails.findByBusinessName", query = "SELECT h FROM 
 HaDetails h WHERE h.businessName = :businessName")
, @NamedQuery(name = "HaDetails.findByContactNum", query = "SELECT h FROM 
 HaDetails h WHERE h.contactNum = :contactNum")
, @NamedQuery(name = "HaDetails.findByBusinessAddress", query = "SELECT h 
 FROM HaDetails h WHERE h.businessAddress = :businessAddress")
, @NamedQuery(name = "HaDetails.findByStatus", query = "SELECT h FROM 
 HaDetails h WHERE h.status = :status")
, @NamedQuery(name = "HaDetails.findByRegDate", query = "SELECT h FROM 
 HaDetails h WHERE h.regDate = :regDate")
, @NamedQuery(name = "HaDetails.findByRemarks", query = "SELECT h FROM 
 HaDetails h WHERE h.remarks = :remarks")
, @NamedQuery(name = "HaDetails.findByLongitude", query = "SELECT h FROM 
 HaDetails h WHERE h.longitude = :longitude")
, @NamedQuery(name = "HaDetails.findByLatitude", query = "SELECT h FROM 
 HaDetails h WHERE h.latitude = :latitude")})
 public class HaDetails implements Serializable {

private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "hadID")
private Integer hadID;
@Basic(optional = false)
@Column(name = "businessName")
private String businessName;
@Basic(optional = false)
@Column(name = "contactNum")
private String contactNum;
@Basic(optional = false)
@Column(name = "businessAddress")
private String businessAddress;
@Basic(optional = false)
@Column(name = "status")
private String status;
@Basic(optional = false)
@Column(name = "regDate")
@Temporal(TemporalType.TIMESTAMP)
private Date regDate;
@Column(name = "remarks")
private String remarks;
@Basic(optional = false)
@Column(name = "longitude")
private String longitude;
@Basic(optional = false)
@Column(name = "latitude")
private String latitude;
@JoinColumn(name = "landlordID", referencedColumnName = "landlordID")
@ManyToOne(optional = false)
private Landlord landlordID;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "hadID")
private Collection<HaImages> haImagesCollection;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "hadID")
private Collection<HaAmenities> haAmenitiesCollection;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "hadID")
private Collection<HaTypes> haTypesCollection;
@OneToMany(mappedBy = "hadID")
private Collection<Tenant> tenantCollection;

public HaDetails() {
}

public HaDetails(Integer hadID) {
    this.hadID = hadID;
}

public HaDetails(Integer hadID, String businessName, String contactNum, String businessAddress, String status, Date regDate, String longitude, String latitude) {
    this.hadID = hadID;
    this.businessName = businessName;
    this.contactNum = contactNum;
    this.businessAddress = businessAddress;
    this.status = status;
    this.regDate = regDate;
    this.longitude = longitude;
    this.latitude = latitude;
}

public Integer getHadID() {
    return hadID;
}

public void setHadID(Integer hadID) {
    this.hadID = hadID;
}

public String getBusinessName() {
    return businessName;
}

public void setBusinessName(String businessName) {
    this.businessName = businessName;
}

public String getContactNum() {
    return contactNum;
}

public void setContactNum(String contactNum) {
    this.contactNum = contactNum;
}

public String getBusinessAddress() {
    return businessAddress;
}

public void setBusinessAddress(String businessAddress) {
    this.businessAddress = businessAddress;
}

public String getStatus() {
    return status;
}

public void setStatus(String status) {
    this.status = status;
}

public Date getRegDate() {
    return regDate;
}

public void setRegDate(Date regDate) {
    this.regDate = regDate;
}

public String getRemarks() {
    return remarks;
}

public void setRemarks(String remarks) {
    this.remarks = remarks;
}

public String getLongitude() {
    return longitude;
}

public void setLongitude(String longitude) {
    this.longitude = longitude;
}

public String getLatitude() {
    return latitude;
}

public void setLatitude(String latitude) {
    this.latitude = latitude;
}

public Landlord getLandlordID() {
    return landlordID;
}

public void setLandlordID(Landlord landlordID) {
    this.landlordID = landlordID;
}

@XmlTransient
public Collection<HaImages> getHaImagesCollection() {
    return haImagesCollection;
}

public void setHaImagesCollection(Collection<HaImages> haImagesCollection) {
    this.haImagesCollection = haImagesCollection;
}

@XmlTransient
public Collection<HaAmenities> getHaAmenitiesCollection() {
    return haAmenitiesCollection;
}

public void setHaAmenitiesCollection(Collection<HaAmenities> 
haAmenitiesCollection) {
    this.haAmenitiesCollection = haAmenitiesCollection;
}

@XmlTransient
public Collection<HaTypes> getHaTypesCollection() {
    return haTypesCollection;
}

public void setHaTypesCollection(Collection<HaTypes> haTypesCollection) {
    this.haTypesCollection = haTypesCollection;
}

@XmlTransient
public Collection<Tenant> getTenantCollection() {
    return tenantCollection;
}

public void setTenantCollection(Collection<Tenant> tenantCollection) {
    this.tenantCollection = tenantCollection;
}

@Override
public int hashCode() {
    int hash = 0;
    hash += (hadID != null ? hadID.hashCode() : 0);
    return hash;
}

@Override
public boolean equals(Object object) {
    // TODO: Warning - this method won't work in the case the id fields are not set
    if (!(object instanceof HaDetails)) {
        return false;
    }
    HaDetails other = (HaDetails) object;
    if ((this.hadID == null && other.hadID != null) || (this.hadID != null 
    && !this.hadID.equals(other.hadID))) {
        return false;
    }
    return true;
}

@Override
public String toString() {
    return "com.balay.entity.HaDetails[ hadID=" + hadID + " ]";
}

}