[英]JPQL ManyToMany Query issue (join Class)
我有关于ManyToMany关联生成的mysql表。 但是当我运行这个查询
select e from Employe e join e.listeRole c inner join c.Role r where r.IdRole = 1
我得到这个错误
13:11:51,959错误[org.jboss.as.ejb3.tx.CMTTxInterceptor](http-localhost-127.0.0.1-8080-6)javax.ejb.EJBTransactionRolledbackException:org.hibernate.QueryException:无法解析属性:listEmploye作者:metier.entities.Employe [从metier.entities.Employe中选择e,然后加入e.listEmploye c内部联接c.Role r,其中r.IdRole = 1] 13:11:51,960错误[org.jboss.ejb3.invocation] (http-localhost-127.0.0.1-8080-6)JBAS014134:方法公用抽象java.util.List metier.sess.IUtilisateurLocal.RoleEmploye():javax.ejb.EJBTransactionRolledbackException:org.hibernate的组件Utilisateur上的EJB调用失败。 QueryException:无法解析属性:listEmploye,属于:metier.entities.Employe [从metier.entities.Employe中选择e加入e.listEmploye c内部连接c.Role r,其中r.IdRole = 1]
我的课是
@Entity
public class Role {
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
private Integer IdRole;
private String Intitule;
@ManyToMany(fetch=FetchType.EAGER,mappedBy="listeRole")
private List<Employe> listEmploye=new ArrayList<Employe>();
public Integer getIdRole() {
return IdRole;
}
public void setIdRole(Integer idRole) {
IdRole = idRole;
}
public String getIntitule() {
return Intitule;
}
public void setIntitule(String intitule) {
Intitule = intitule;
}
public List<Employe> getListEmploye() {
return listEmploye;
}
public void setListEmploye(List<Employe> listEmploye) {
this.listEmploye = listEmploye;
}
public Role(String intitule) {
super();
Intitule = intitule;
}
public Role() {
super();
// TODO Auto-generated constructor stub
}
}
和
@Entity
@DiscriminatorValue(value="employe")
public class Employe extends Utilisateur{
private String TypeEmploye;
private Integer authentification;
private Date logindate;
private Date logoutDate;
//Employe class
@ManyToMany(fetch=FetchType.EAGER)
private List<Role> listeRole=new ArrayList<Role>();
public String getTypeEmploye() {
return TypeEmploye;
}
public void setTypeEmploye(String typeEmploye) {
TypeEmploye = typeEmploye;
}
public Integer getAuthentification() {
return authentification;
}
public Date getLogindate() {
return logindate;
}
public void setLogindate(Date logindate) {
this.logindate = logindate;
}
public Date getLogoutDate() {
return logoutDate;
}
public void setLogoutDate(Date logoutDate) {
this.logoutDate = logoutDate;
}
public void setAuthentification(Integer authentification) {
this.authentification = authentification;
}
public List<Role> getListeRole() {
return listeRole;
}
public void setListeRole(List<Role> listeRole) {
this.listeRole = listeRole;
}
public Employe(String username, String password, String email,
boolean statut, String typeEmploye, Integer authentification,
List<Role> listeRole) {
super(username, password, email, statut);
TypeEmploye = typeEmploye;
this.authentification = authentification;
this.listeRole = listeRole;
}
public Employe() {
super();
// TODO Auto-generated constructor stub
}}
谢谢你的帮助
对于多对多,您应该在拥有方上定义一个可连接项,如下所示:
@ManyToMany
@JoinTable(name = "emp_roles", joinColumns = {@JoinColumn(name = "emp_id",
referencedColumnName = "id")}, inverseJoinColumns = {@JoinColumn(name = "role_id",
referencedColumnName = "id")})
private List<Role> listeRole;
在您的情况下,该雇员实体应启用此映射。
为什么从角色到员工都有参考? 我看不到为什么要使用它,因此建议您将双向映射更改为单向映射(因此只需将角色列表中的雇员列表删除)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.