J'ai une table qui a une clé primaire composite constituée d'une séquence et de deux clés étrangères Je suis capable de persister Ma classe d'entité mais elle ne génère pas selon la séquence. Le tableau qui a la clé primaire composite constitué d'une séquence et deux clés étrangères, hbm2java Maven suit donne des entitésJPA @EmbeddedId ne génère pas de séquence
Voici la principale entité
package aop.web.teacher.rmodels;
// Generated Dec 14, 2010 8:45:32 PM by Hibernate Tools 3.2.2.GA
import java.util.Date;
import javax.persistence.AttributeOverride;
import javax.persistence.AttributeOverrides;
import javax.persistence.Column;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
/**
* Schoolmaster generated by hbm2java
*/
@Entity
@Table(name = "schoolmaster", schema = "public")
public class Schoolmaster implements java.io.Serializable {
private SchoolmasterId id;
...
@EmbeddedId
@AttributeOverrides({
@AttributeOverride(name = "id", column = @Column(name = "id", nullable = false)),
@AttributeOverride(name = "districtId", column = @Column(name = "district_id", nullable = false)),
@AttributeOverride(name = "typeOfSchool", column = @Column(name = "type_of_school", nullable = false)) })
public SchoolmasterId getId() {
return this.id;
}
public void setId(SchoolmasterId id) {
this.id = id;
}
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "type_of_school", nullable = false, insertable = false, updatable = false)
public AopTeachersTypeMaster getAopTeachersTypeMaster() {
return this.aopTeachersTypeMaster;
}
public void setAopTeachersTypeMaster(
AopTeachersTypeMaster aopTeachersTypeMaster) {
this.aopTeachersTypeMaster = aopTeachersTypeMaster;
}
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "school_nature")
public AopTeachersSchoolNatureMaster getAopTeachersSchoolNatureMaster() {
return this.aopTeachersSchoolNatureMaster;
}
public void setAopTeachersSchoolNatureMaster(
AopTeachersSchoolNatureMaster aopTeachersSchoolNatureMaster) {
this.aopTeachersSchoolNatureMaster = aopTeachersSchoolNatureMaster;
}
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "district_id", nullable = false, insertable = false, updatable = false)
public AopTeachersDistrictMaster getAopTeachersDistrictMaster() {
return this.aopTeachersDistrictMaster;
}
public void setAopTeachersDistrictMaster(
AopTeachersDistrictMaster aopTeachersDistrictMaster) {
this.aopTeachersDistrictMaster = aopTeachersDistrictMaster;
}
@Column(name = "school_name", length = 50)
public String getSchoolName() {
return this.schoolName;
}
public void setSchoolName(String schoolName) {
this.schoolName = schoolName;
}
@Column(name = "school_address")
public String getSchoolAddress() {
return this.schoolAddress;
}
public void setSchoolAddress(String schoolAddress) {
this.schoolAddress = schoolAddress;
}
@Column(name = "school_phone_number", length = 12)
public String getSchoolPhoneNumber() {
return this.schoolPhoneNumber;
}
public void setSchoolPhoneNumber(String schoolPhoneNumber) {
this.schoolPhoneNumber = schoolPhoneNumber;
}
@Temporal(TemporalType.DATE)
@Column(name = "establishment_date", length = 13)
public Date getEstablishmentDate() {
return this.establishmentDate;
}
public void setEstablishmentDate(Date establishmentDate) {
this.establishmentDate = establishmentDate;
}
@Column(name = "school_no_of_teachers")
public Integer getSchoolNoOfTeachers() {
return this.schoolNoOfTeachers;
}
public void setSchoolNoOfTeachers(Integer schoolNoOfTeachers) {
this.schoolNoOfTeachers = schoolNoOfTeachers;
}
@Column(name = "school_no_of_students")
public Integer getSchoolNoOfStudents() {
return this.schoolNoOfStudents;
}
public void setSchoolNoOfStudents(Integer schoolNoOfStudents) {
this.schoolNoOfStudents = schoolNoOfStudents;
}
}
Voici la classe PK intégrée.
/**
* SchoolmasterId generated by hbm2java
*/
@Embeddable
public class SchoolmasterId implements java.io.Serializable {
private long id;
private long districtId;
private long typeOfSchool;
public SchoolmasterId() {
}
public SchoolmasterId(long id, long districtId, long typeOfSchool) {
this.id = id;
this.districtId = districtId;
this.typeOfSchool = typeOfSchool;
}
@Column(name="id", nullable=false)
@GeneratedValue(strategy=GenerationType.SEQUENCE)
public long getId() {
return this.id;
}
public void setId(long id) {
this.id = id;
}
@NaturalId
@Column(name="district_id", nullable=false)
public long getDistrictId() {
return this.districtId;
}
public void setDistrictId(long districtId) {
this.districtId = districtId;
}
@NaturalId
@Column(name="type_of_school", nullable=false)
public long getTypeOfSchool() {
return this.typeOfSchool;
}
public void setTypeOfSchool(long typeOfSchool) {
this.typeOfSchool = typeOfSchool;
}
public boolean equals(Object other) {
if ((this == other)) return true;
if ((other == null)) return false;
if (!(other instanceof SchoolmasterId)) return false;
SchoolmasterId castOther = (SchoolmasterId) other;
return (this.getId()==castOther.getId())
&& (this.getDistrictId()==castOther.getDistrictId())
&& (this.getTypeOfSchool()==castOther.getTypeOfSchool());
}
public int hashCode() {
int result = 17;
result = 37 * result + (int) this.getId();
result = 37 * result + (int) this.getDistrictId();
result = 37 * result + (int) this.getTypeOfSchool();
return result;
}
}
Ici, je me attends Id à ... autogénéré je n'ai ajouté
@NaturalId
et
@GeneratedValue(strategy=GenerationType.SEQUENCE)
J'ai aussi essayé avec GenerationType.AUTO mais a fait ne fonctionne pas. Veuillez nous suggérer.
Je soupçonne que vous ne recevez pas une réponse parce que cela ne peut tout simplement pas être fait. J'ai un cas d'utilisation similaire (un champ de clé primaire sur les trois est autogénéré (bigserial dans PostgreSQL)) et a découvert que @GeneratedValue ne peut être utilisé qu'avec @Id. –
C'est incroyable que cela ne puisse pas être fait étant donné le nombre de messages que j'ai vu poser à ce sujet.Je le mets à l'intransigeance de la part des développeurs hibernate/jpa/eclipselink qui ne veulent pas fournir un cas d'utilisation assez commun. Une des attitudes "nous savons mieux". – BillR