Question

我将JPA用于两个表之间的经典关系（1：N）：

RefCollectivite（1）==>（N）ColPlanCompteM61

我希望在删除RefCollectivite实体时进行级联删除。除了刚刚创建RefCollectivite实体（当我创建1 RefCollectivite时，我还创建232 ColPlanCompteM61）时，级联删除效果很好。删除RefCollectivite时，未检测到ColPlanCompteM61实体，并且由于违反了外键而导致删除失败。

我的持久RefCollectivite代码：

    public void creerRefCollectivite(RefCollectivite collectivite) {
    try {
        getEntityManager().persist(collectivite);
        getEntityManager().flush(); 
    } catch (Exception e) {
    }
}

坚持ColPlanCompteM61：

public void initialiserCollectivite(RefCollectivite collectivite) {

    List<RefPlanCompteM61> listeRefPlanCompteM61 = getRefPlanCompteM61Facade().rechercherListeRefPlanCompteM61();

    for (RefPlanCompteM61 ligne : listeRefPlanCompteM61) {

        ColPlanCompteM61 colPlanCompteM61 = new ColPlanCompteM61(ligne, collectivite);

        try {
            getEntityManager().persist(colPlanCompteM61);
        } catch (Exception e) {
        }
    }
}

我要删除的代码：

    public void supprimerRefCollectivite(RefCollectivite collectivite) {
    try {
        getEntityManager().remove(rechercherRefCollectivite(collectivite));
    } catch (NoResultException e) {
    }
}

    public RefCollectivite rechercherRefCollectivite(RefCollectivite collectivite) {  

    Query jQuery = getEntityManager().createQuery("select x from RefCollectivite x where x.idPk = :clePrimaire");

    jQuery.setParameter("clePrimaire", collectivite.getIdPk());

    try {
        return (RefCollectivite) jQuery.getSingleResult();
    } catch (NoResultException e) {
        return null;
    }
}

实体：RefCollectivite

@Entity 
@Table(name = "RefCollectivite")
public class RefCollectivite implements Serializable {

@OneToMany(cascade = CascadeType.REMOVE, mappedBy="refCollectivite")
private List<ColPlanCompteM61> listePlanCompteM61;

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int idPk;

实体：ColPlanCompteM61：

@Entity
@Table(name = "ColPlanCompteM61")
public class ColPlanCompteM61 implements Serializable{

@ManyToOne
@JoinColumn(name = "REFCOLLECTIVITEFK", referencedColumnName = "IDPK", insertable = false, updatable = false)
private RefCollectivite refCollectivite;

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int idPk;
private int refCollectiviteFk;
private int refPlanCompteM61Fk;
private Double valeur01;
private Double valeur02;
private Double valeur03;
private Double valeur04;
private Double valeur05;

Answer 1

要级联删除“ more aggressive remove cascading mode”中的实体，您可以在orphanRemoval=true的关系注释中添加RefCollectivite属性。而且，请添加一些有关RefCollectivite及其JPA设计（关系）的信息。

持久保存后，JPA级联删除失败

1 个答案: