休眠删除关联表条目时关联的一个部分被删除

Question

我有以下hibernate映射：

类杂志：

@Entity 
@Table(name = "PROJECTNAME_MAGAZINE") 
@SequenceGenerator(name = "MAGAZINE_SEQUENCE_GENERATOR", sequenceName = "MAGAZINE_SEQUENCE") 
@Analyzer(definition = "customanalyzer") 
public class Magazine extends AbstractBaseEntity implements Serializable{ 


@Id 
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "MAGAZINE_SEQUENCE_GENERATOR") 
@Column(name = "ID") 
private Long id; 
@NotNull 
@Field(index=Index.YES, analyze=Analyze.YES, store=Store.NO) 

@LazyCollection(LazyCollectionOption.FALSE) 
@OneToMany(cascade = CascadeType.ALL, mappedBy="magazine", orphanRemoval = true) 
private List<MagazineKeywordMapper> magazineKeywordMappings; 

类MagazineKeyword

@Entity 
@Table(name = "PROJECTNAME_MAGAZINE_KEYWORD") 
public class MagazineKeyword extends AbstractBaseEntity { 

public MagazineKeyword(String keyword) { 
    this.keyword = keyword; 
    this.id = (long) keyword.hashCode(); 
} 

@Id 
@Column(name = "ID") 
private Long id; 

@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy="keyword",orphanRemoval=true) 
private List<MagazineKeywordMapper> magazineMappings; 

类MagazineKeywordMapper

@Entity 
@Table(name="MAGAZINE_KEYWORD_MAPPER") 
public class MagazineKeywordMapper extends AbstractBaseEntity implements Serializable { 

private static final long serialVersionUID = 1L; 

@Id 
@Column(name = "ID") 
private Long id; 

@ManyToOne 
    @PrimaryKeyJoinColumn(name="MAGAZINE_ID", referencedColumnName="ID") 
    private Magazine magazine; 


    @ManyToOne 
    @PrimaryKeyJoinColumn(name="KEYWORD_ID", referencedColumnName="ID") 
    private MagazineKeyword keyword; 

    public MagazineKeywordMapper() { 

    } 

public MagazineKeywordMapper(Magazine magazine, MagazineKeyword keyword) { 
    this.magazine = magazine; 
    this.keyword = keyword; 
    this.id = Long.parseLong(magazine.getId()+""+keyword.getId()); 
} 

我尝试了很多东西，但不知何故，我无法找到一种好办法在映射上进行删除。如果我删除了一个关键字，我希望所有包含此关键字的映射都被删除。不知何故，我得到的是IntegrityConstraintViolations ...我做错了什么？我使用DAO并在关键字对象上调用EntityManager.remove（）。我也尝试手动删除相关杂志对象的映射。任何提示都非常感谢。感谢您的帮助球员！:)

Answer 1

发现什么问题：我有上限制删除数据库约束。将它设置为级联，现在一切都完美了！

Answer 2

因为我看到你不使用懒惰的获取类型。它会解决你的问题。使用类似的解决方案：

@OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, mappedBy = "xxx") 

Answer 3

级联策略是你需要寻找

Hibernate Documentation

Stackoverflow thread