hibernate多表单外键

Question

@Column(name = "object_type", nullable = false)
private String objectType;

@ManyToOne
@JoinColumn(name="object_id",referencedColumnName="id" ,insertable=false, updatable=false)
private Vendor vendor;

@ManyToOne
@JoinColumn(name="object_id",referencedColumnName="id",insertable=false, updatable=false)
private Customer customer;

我可以这样做吗？或者有没有其他更好的方法来处理这种情况

Answer 1

如果（联系是一对多的关系）

@OneToMany
@JoinColumn(name="object_id",referencedColumnName="id" ,insertable=false, updatable=false)
private List<Vendor> vendors;

@OneToMany
@JoinColumn(name="object_id",referencedColumnName="id",insertable=false, updatable=false)
private List<Customer> customer;

否则，如果contact是多对一，那么不要在contact类中定义外键，而是在vendor和customer类中定义外键，每个类都有一个字段，如下所示

@OneToMany
@JoinColumn(name="id",referencedColumnName="object_id" ,insertable=false, updatable=false)
private List<Contact> contacts;

还要注意LazyFetch，否则最好将其设置为false

@LazyCollection(LazyCollectionOption.FALSE)