如何管理JPA的多重继承

Question

大家好，我有一个问题要在JPA上使用四个多inhentaded桌子进行操作。 我有四个entites

@Entity
@Table(name = "offer")
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class Offer extends AbstractAuditingEntity implements Serializable {

private static final long serialVersionUID = 1L;

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "offer_seq")
@SequenceGenerator(name = "offer_seq", sequenceName = "offer_seq", allocationSize = 1)
private Long id;    

 //... other fields

@OneToMany(mappedBy = "offer", cascade = CascadeType.ALL, orphanRemoval = true)
@JsonIgnore
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
private Set<Customer> customers = new HashSet<>();


@OneToMany(mappedBy = "offer", cascade = CascadeType.ALL, orphanRemoval = true)
@JsonIgnore
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
private Set<PriceIndex> prices = new HashSet<>();

@OneToMany(mappedBy = "offer",  cascade = CascadeType.ALL, orphanRemoval = true)
@JsonIgnore
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
private Set<VolRiskOff> volRiskOff = new HashSet<>();


 //... constructors , getters and setters
}

这个

@Entity
@Table(name = "price_index")
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class PriceIndex extends AbstractAuditingEntity implements Serializable {

private static final long serialVersionUID = 1L;

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "price_index_seq")
@SequenceGenerator(name = "price_index_seq", sequenceName = "price_index_seq", 
allocationSize = 1)
private Long id;

 //... other fields

@ManyToOne
private Offer offer;

@ManyToOne
private Customer customer;

  //... constructors , getters and setters
}

，

@Entity
@Table(name = "vol_risk_off")
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class VolRiskOff implements Serializable {

private static final long serialVersionUID = 1L;

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "vol_risk_off_seq")
@SequenceGenerator(name = "vol_risk_off_seq", sequenceName = "vol_risk_off_seq", 
allocationSize = 1)
private Long id;
  
  //... other fields

@ManyToOne(fetch = FetchType.LAZY)
@NotFound(action = NotFoundAction.IGNORE)
@JoinColumn(name = "customer_id")
private Customer customer;

@ManyToOne
@NotFound(action = NotFoundAction.IGNORE)
@JoinColumn(name = "offer_id")
private Offer offer;

@OneToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "price_index_id", referencedColumnName = "id")
private PriceIndex priceIndex;

 //... constructors , getters and setters
}

所有这些

@Entity
@Table(name = "customer")
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class Customer extends AbstractAuditingEntity implements Serializable {

private static final long serialVersionUID = 1L;

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "customer_seq")
@SequenceGenerator(name = "customer_seq", sequenceName = "customer_seq", 
allocationSize=1)
private Long id;
 

   //... other fields

@ManyToOne
private Offer offer;

@OneToMany(mappedBy = "customer")
@JsonIgnore
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
private Set<PriceIndex> priceIndexes = new HashSet<>();

@OneToMany(mappedBy = "customer", cascade = CascadeType.REMOVE, orphanRemoval = true)
@JsonIgnore
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
@NotFound(action = NotFoundAction.IGNORE)
private Set<VolRiskOff> volRiskOff = new HashSet<>();

 //... constructors , getters and setters
 }

都可以直到我添加了vol_risk_off table，然后试图从优惠中删除客户。 现在如何配置这些类别会出现任何错误，但是如果我尝试删除客户的相关PriceIndex和Volriskoff，则所有相同的报价都相关，并且客户在PriceIndex和Volriskoff中均为。 所以我的问题是如何管理课程以使所有操作都起作用而没有任何冲突？