I googled it but could't found any solution
I Two classes Application.java and ApplicationVersion.java they have One-to-Many relation, ApplicationVersionPk.java is a Embedable class which is used as composite key in ApplicationVersionPk.java below are my classes when i run my web app i get Mapping Exception with
nested exception is org.hibernate.MappingException: Foreign key (FKA50BD18824C3AEF5:ApplicationVersion [application_id,version])) must have same number of columns as the referenced primary key (Application [id]):
Application.java
@Entity
@Table(uniqueConstraints = @UniqueConstraint(columnNames = { "nameSpace" }))
public class Application implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private Long id;
private Set<ApplicationVersion> appVersions = new HashSet<ApplicationVersion>(
5);
@Id
@GeneratedValue
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@OneToMany(fetch = FetchType.LAZY, mappedBy = "applicationVersionPk")
@Cascade(value = { CascadeType.DELETE })
public Set<ApplicationVersion> getAppVersions() {
return appVersions;
}
public void setAppVersions(Set<ApplicationVersion> appVersions) {
this.appVersions = appVersions;
}
}
ApplicationVersion.java
@Entity
public class ApplicationVersion implements Serializable {
private static final long serialVersionUID = 1L;
private Long id;
private ApplicationVersionPk applicationVersionPk;
@EmbeddedId
public ApplicationVersionPk getApplicationVersionPk() {
return applicationVersionPk;
}
public void setApplicationVersionPk(
ApplicationVersionPk applicationVersionPk) {
this.applicationVersionPk = applicationVersionPk;
}
@GeneratedValue
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
}
ApplicationVersionPk.java
@Embeddable
public class ApplicationVersionPk implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private Application application;
private String version;
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumns({ @JoinColumn(referencedColumnName = "id", nullable = false) })
public Application getApplication() {
return application;
}
public void setApplication(Application application) {
this.application = application;
}
public String getVersion() {
return version;
}
public void setVersion(String version) {
this.version = version;
}
public boolean equals(Object other) {
if ((this == other))
return true;
if ((other == null))
return false;
if (!(other instanceof ApplicationVersionPk))
return false;
ApplicationVersionPk versionPk = (ApplicationVersionPk) other;
return (this.getApplication().getNameSpace()
.equalsIgnoreCase(versionPk.getApplication().getNameSpace()) && this.version
.equalsIgnoreCase(versionPk.getVersion()));
}
public int hashCode() {
int result = 17;
result = result + this.version.hashCode();
result += result + this.getApplication().getNameSpace().hashCode();
return result;
}
}
You are joining Application.appVersions
using two keys on the side of ApplicationVersion
instead of the only application's @Id
; you can use mappedBy="applicationVersionPk.application"