Hibernate とマッピングに問題がありますoneToMany。
これが私の関数です:
Location location = new Location();
location.setDateTime(new Date());
location.setLatitude(lat);
location.setLongitude(lon);
location = this.locationDao.save(location);
merchant = new Merchant();
merchant.setAddress(address);
merchant.setCity(city);
merchant.setCountry(country);
merchant.setLocation(location);
merchant.setName(name);
merchant.setOrganization(organization);
merchant.setPublicId(publicId);
merchant.setZipCode(zipCode);
merchant.setApplication(this.applicationDAO.findByPublicId(applicationPublicId));
merchant = this.merchantDao.save(merchant);
return merchant;
ここに私の 2 つのエンティティがあります:
位置
import java.io.Serializable;
import java.util.Date;
import java.util.List;
import javax.persistence.*;
import javax.validation.constraints.NotNull;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;
@Entity
@Table(name = "location")
@XmlRootElement
public class Location implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "id", nullable = false)
private Long id;
@Basic(optional = false)
@NotNull
@Column(name = "latitude", nullable = false)
private double latitude;
@Basic(optional = false)
@NotNull
@Column(name = "longitude", nullable = false)
private double longitude;
@Basic(optional = false)
@NotNull
@Column(name = "date_time", nullable = false)
@Temporal(TemporalType.TIMESTAMP)
private Date dateTime;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "location")
private List<Merchant> retailerList;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "location")
private List<MobileUser> userList;
public Location() {
}
public Location(Long id) {
this.id = id;
}
public Location(Long id, double latitude, double longitude, Date dateTime) {
this.id = id;
this.latitude = latitude;
this.longitude = longitude;
this.dateTime = dateTime;
}
public Long getId() {
return id;
}
//getters and setters
@XmlTransient
public List<Merchant> getRetailerList() {
return retailerList;
}
public void setRetailerList(List<Merchant> retailerList) {
this.retailerList = retailerList;
}
@XmlTransient
public List<MobileUser> getUserList() {
return userList;
}
public void setUserList(List<MobileUser> userList) {
this.userList = userList;
}
@Override
public int hashCode() {
int hash = 0;
hash += (id != null ? id.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 Location)) {
return false;
}
Location other = (Location) object;
if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
return false;
}
return true;
}
@Override
public String toString() {
return "com.fgsecure.geoloc.entities.Location[ id=" + id + " ]";
}
商人
import java.io.Serializable;
import javax.persistence.*;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
import javax.xml.bind.annotation.XmlRootElement;
import org.codehaus.jackson.annotate.JsonAutoDetect;
import org.codehaus.jackson.annotate.JsonIgnore;
@JsonAutoDetect
@Entity
@Table(name = "retailer")
@XmlRootElement
public class Merchant implements Serializable {
private static final long serialVersionUID = 1L;
@JsonIgnore
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "id", nullable = false)
private Long id;
@Basic(optional = false)
@NotNull
@Size(min = 1, max = 50)
@Column(name = "public_id", nullable = false, length = 50)
private String publicId;
@Basic(optional = false)
@NotNull
@Size(min = 1, max = 50)
@Column(name = "name", nullable = false, length = 50)
private String name;
@Size(max = 50)
@Column(name = "organization", length = 50)
private String organization;
@Size(max = 128)
@Column(name = "address", length = 128)
private String address;
@Size(max = 10)
@Column(name = "zip_code", length = 10)
private String zipCode;
@Size(max = 50)
@Column(name = "city", length = 50)
private String city;
@Size(max = 50)
@Column(name = "country", length = 50)
private String country;
@JoinColumn(name = "location_id", referencedColumnName = "id", nullable = false)
@ManyToOne(optional = false)
private Location location;
@JoinColumn(name = "application_id", referencedColumnName = "id", nullable = false)
@ManyToOne(optional = false)
private Application application;
public Merchant() {
}
public Merchant(Long id) {
this.id = id;
}
public Merchant(Long id, String publicId, String name) {
this.id = id;
this.publicId = publicId;
this.name = name;
}
//getters and setters
@Override
public int hashCode() {
int hash = 0;
hash += (id != null ? id.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 Merchant)) {
return false;
}
Merchant other = (Merchant) object;
if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
return false;
}
return true;
}
@Override
public String toString() {
return "com.fgsecure.geoloc.entities.Retailer[ id=" + id + " ]";
}
}
そして、関数を呼び出すたびに次の結果が返されます。
org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save():
この行の場合:
location = this.locationDao.save(location);
理由がわかりません。その場合、場所の ID は自動生成されるため、手動で割り当てる必要はありません。何か間違ったことをしたに違いありませんが、3 日間探しても見つかりません。
私は PostGreSQL を使用しており、ID は次のシーケンスで自動生成された ID です。
nextval('location_id_seq'::regclass)`
編集解決:
わかりました。ご回答ありがとうございます。
将来他の人の役に立つ可能性がある場合は、次のように ID のパラメータを変更するだけです。
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "id",unique=true, nullable = false)
ベストアンサー1
ID 属性が設定されていません。これは、DB フィールドが自動増分に設定されていないことが原因である可能性があります。使用している DB は何ですか? MySQL ですか? フィールドは自動増分に設定されていますか?