注解查询，仅返回带有弹性数据弹性搜索的特定嵌套字段

Question

注解查询并仅返回具有弹性数据弹性搜索的特定嵌套字段

版本：

springboot：2.1.7.RELEASE

spring-data-elasticsearch：2.1.7.RELEASE

elasticsearch：6.5.4

---

文档：

@Data
@Document(indexName = "test_book", type = "test_book")
public class Book {
    @Id
    private String id;

    private String name;

    private LocalDateTime time;
    /**
     *
     */
    private Publishing publishing;

    /**
     * 
     */
    private Author author;
}

存储库：

public interface BookRepository extends ElasticsearchRepository<Book,String> {

    @Query("{" +
            "\"_source\": {" +
            "   \"includes\": " +
            "       [ \"name\"]" +
            "}," +
            "\"bool\" : {" +
            "   \"must\" : [{" +
            "       \"term\" : {" +
            "           \"id.keyword\" : \"?0\"" +
            "           }" +
            "       }]" +
            "   }" +
            "}")
    Book queryBookNameById(String id);
}

我只想获取name的数据，可以相对节省内存资源。但是我有一个错误，我不能这样使用吗？还是只能使用elasticsearchTemplate？

ParsingException[no [query] registered for [_source]
]
    at org.elasticsearch.index.query.AbstractQueryBuilder.parseInnerQueryBuilder(AbstractQueryBuilder.java:332)
    at org.elasticsearch.index.query.WrapperQueryBuilder.doRewrite(WrapperQueryBuilder.java:165)
    at org.elasticsearch.index.query.AbstractQueryBuilder.rewrite(AbstractQueryBuilder.java:279)
    at org.elasticsearch.search.builder.SearchSourceBuilder.rewrite(SearchSourceBuilder.java:921)
    at org.elasticsearch.search.builder.SearchSourceBuilder.rewrite(SearchSourceBuilder.java:80)
    at org.elasticsearch.index.query.Rewriteable.rewriteAndFetch(Rewriteable.java:97)
    at org.elasticsearch.index.query.Rewriteable.rewriteAndFetch(Rewriteable.java:87)
    at org.elasticsearch.action.search.TransportSearchAction.doExecute(TransportSearchAction.java:215)
    at org.elasticsearch.action.search.TransportSearchAction.doExecute(TransportSearchAction.java:68)
    at org.elasticsearch.action.support.TransportAction$RequestFilterChain.proceed(TransportAction.java:167)
    at org.elasticsearch.xpack.security.action.filter.SecurityActionFilter.apply(SecurityActionFilter.java:126)
......

Answer 1

当前不适用于存储库的@Query注释。 Spring Data Elasticsearch会将注释的值包装为

query