Hibernate Search - 索引多对一关系

Question

我有两个索引实体

@Entity @Indexed
public class AEntity implements {

    @Id
    private String externalId;

    @OneToMany(cascade = CascadeType.ALL) @JoinColumn(name = "externalId")
    private Set<BEntity> bEntities;
    
}

@Entity @Indexed
public class BEntity {

    @JsonIgnore @ManyToOne
    @IndexedEmbedded(depth = 1)
    @JoinColumn(name = "externalId", updatable = false)
    private AEntity aEntity;
    
}

现在，当我这样搜索 BEntity 时：

private QueryBuilder getQuery() {
    FullTextEntityManager fullTextEntityManager = getFullTextEntityManager();
    return fullTextEntityManager.getSearchFactory().buildQueryBuilder().forEntity(BEntity.class).get();
}
    
Query query = getQuery().bool()
                .must(getQuery().keyword().onField("aEntity.externalId").matching(externalId).createQuery())
                .createQuery();

我有以下错误：

Unable to find field aEntity.externalId in BEntity

Answer 1

默认情况下 @IndexedEmbedded 不包含 ID 字段。

您可以对文档 ID 字段执行的操作有限制，因此我个人建议定义一个与文档 ID 分开的实际字段。这样你就可以安全地使其可排序、规范化或任何你想要的：

@Entity @Indexed
public class AEntity implements {

    @Id
    @DocumentId(name = "docId") // CHANGE HERE
    @Field // CHANGE HERE
    private String externalId;

    @OneToMany(cascade = CascadeType.ALL) @JoinColumn(name = "externalId")
    private Set<BEntity> bEntities;
    
}

@Entity @Indexed
public class BEntity {

    @JsonIgnore @ManyToOne
    @IndexedEmbedded(depth = 1)
    @JoinColumn(name = "externalId", updatable = false)
    private AEntity aEntity;
    
}

但是如果你真的想使用文档ID字段，你可以使用@IndexedEmbedded(includeEmbeddedObjectId = true):

@Entity @Indexed
public class AEntity implements {

    @Id
    private String externalId;

    @OneToMany(cascade = CascadeType.ALL) @JoinColumn(name = "externalId")
    private Set<BEntity> bEntities;
    
}

@Entity @Indexed
public class BEntity {

    @JsonIgnore @ManyToOne
    @IndexedEmbedded(depth = 1, includeEmbeddedObjectId = true) // CHANGE HERE
    @JoinColumn(name = "externalId", updatable = false)
    private AEntity aEntity;
    
}

不要忘记在更改注释后重新索引数据。

Hibernate Search - 索引多对一关系

Hibernate Search - indexed ManyToOne relation

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hibernate

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