Java 刷新单向实体时不为null约束冲突

我正在使用

@OneToMany

和

@ManyToOne

注释处理单向和双向映射，但在持久化实体并将其刷新到数据库中时，我无法突破单向映射的障碍

因此，两个表

delivery\u company

可能有许多

delivery

：

SQL（Oracle）：

单向映射：

@Entity
@Table(name = "Delivery")
class DeliveryUniDirectional
{
    @Id
    @SequenceGenerator(name = "delivery_id_sequence", sequenceName = "delivery_id_sequence", allocationSize = 1)
    @GeneratedValue(generator = "delivery_id_sequence", strategy = GenerationType.SEQUENCE)
    @Column(name = "delivery_id")
    public Long deliveryId;

    public BigDecimal price;

    @Temporal(TemporalType.DATE)
    public Date deliveryTime;

// setters, getters
}

@Entity
@Table(name = "delivery_company")
class DeliveryCompanyUniDirectional {

    @Id
    @Column(name = "delivery_company_id")
    @SequenceGenerator(name = "delivery_company_id_sequence", sequenceName = "delivery_company_id_sequence", allocationSize = 1)
    @GeneratedValue(generator = "delivery_company_id_sequence", strategy = GenerationType.SEQUENCE)
    private Long deliveryCompanyId;

    @Column(unique = true)
    private String deliveryCompanyName;

    @OneToMany(cascade = CascadeType.ALL)
    @JoinColumn(name = "delivery_id", nullable = false, insertable = false, updatable = false)
    private List<DeliveryUniDirectional> deliveries = new LinkedList<>();

// setters getters
}

我收到

javax.persistence.PersistenceException: org.hibernate.exception.ConstraintViolationException: could not execute batch ...
// 
Caused by: java.sql.BatchUpdateException: ORA-01400: cannot insert NULL into ("TESTUSER"."DELIVERY"."DELIVERY_COMPANY_ID")

当

entityManager.flush（）时

我尝试在
deliverycompanyinidirectional
中使用
@JoinColumn
，但在这种情况下，hibernate抱怨：

Error creating bean with name 'entityManagerFactory' defined in class path resource ...
// ...
Caused by: org.hibernate.MappingException: Repeated column in mapping for entity: wieczorek.jakub.shop.business.spring.model.domain.DeliveryUniDirectional column: delivery_id (should be mapped with insert="false" update="false")

显然，
delivery
表中外键的
notnull
约束存在问题。当我尝试使用双向映射时，持久化和刷新效果非常好，但我希望使用单向映射实现同样的效果

感谢阅读
您的@join列应该是
delivery\u company\u id
，因为它是您的外键

@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name="delivery_company_id", referencedColumnName="delivery_company_id", nullable = false)
private List<DeliveryUniDirectional> deliveries = new LinkedList<>();

@OneToMany（cascade=CascadeType.ALL）
@JoinColumn（name=“delivery\u company\u id”，referencedColumnName=“delivery\u company\u id”，nullable=false）
私有列表传递=新建LinkedList（）；
我准备不同意Eklavya的观点，因为交货公司id是您所在表格中的一列。但这是因为我略过并意识到你没有遵循我认为是一种惯例：任何表中的ID列都只是名为ID，并且只有外键被命名为“id id”。当你做一个OneToMany注释时，连接列总是指向另一个表中的指向我的列。@ ZAG在POST中看到表创建SQL，更新到更清晰的版本，感谢@Eklayva提供了有效的解决方案（由于非空约束，我不得不添加
nullable=false
）。感谢@Zag提供的有用评论。
Error creating bean with name 'entityManagerFactory' defined in class path resource ...
// ...
Caused by: org.hibernate.MappingException: Repeated column in mapping for entity: wieczorek.jakub.shop.business.spring.model.domain.DeliveryUniDirectional column: delivery_id (should be mapped with insert="false" update="false")

@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name="delivery_company_id", referencedColumnName="delivery_company_id", nullable = false)
private List<DeliveryUniDirectional> deliveries = new LinkedList<>();