Question

我想在弹性搜索中针对值数组搜索字段。我正在用Java编写自定义术语查询，但每次都会失败。

代码-

@Query("{ \"bool\" : { \"must\" : [\t{ \"term\" : {\"userId\" : ?0 } },\t{ \"terms\" : { \"language\" : ?1 } } ] } }")
List<PostElastic> findByProviderIdAndLanguagesPostOrderLessThanFromId(Long providerId, List<String> languages, Long fromTimestamp,Pageable pageable);

传递语言字段的任何值时，都会出现以下异常

java.io.IOException: Unrecognized token 'en': was expecting ('true', 'false' or 'null')
at [Source: [B@20502fa2; line: 1, column: 86]
at com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:1702) ~[jackson-core-2.9.6.jar:2.9.6]
at com.fasterxml.jackson.core.base.ParserMinimalBase._reportError(ParserMinimalBase.java:558) ~[jackson-core-2.9.6.jar:2.9.6]
at com.fasterxml.jackson.core.json.UTF8StreamJsonParser._reportInvalidToken(UTF8StreamJsonParser.java:3528) ~[jackson-core-2.9.6.jar:2.9.6]
at com.fasterxml.jackson.core.json.UTF8StreamJsonParser._handleUnexpectedValue(UTF8StreamJsonParser.java:2686) ~[jackson-core-2.9.6.jar:2.9.6]
at com.fasterxml.jackson.core.json.UTF8StreamJsonParser._nextTokenNotInObject(UTF8StreamJsonParser.java:878) ~[jackson-core-2.9.6.jar:2.9.6]
at com.fasterxml.jackson.core.json.UTF8StreamJsonParser.nextToken(UTF8StreamJsonParser.java:772) ~[jackson-core-2.9.6.jar:2.9.6]
at org.elasticsearch.common.xcontent.json.JsonXContentParser.nextToken(JsonXContentParser.java:55) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.index.query.TermsQueryBuilder.parseValues(TermsQueryBuilder.java:391) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.index.query.TermsQueryBuilder.fromXContent(TermsQueryBuilder.java:356) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.search.SearchModule.lambda$registerQuery$10(SearchModule.java:763) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.common.xcontent.NamedXContentRegistry.parseNamedObject(NamedXContentRegistry.java:143) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.common.xcontent.support.AbstractXContentParser.namedObject(AbstractXContentParser.java:402) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.index.query.QueryParseContext.parseInnerQueryBuilder(QueryParseContext.java:122) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.index.query.BoolQueryBuilder.fromXContent(BoolQueryBuilder.java:356) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.search.SearchModule.lambda$registerQuery$10(SearchModule.java:763) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.common.xcontent.NamedXContentRegistry.parseNamedObject(NamedXContentRegistry.java:143) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.common.xcontent.support.AbstractXContentParser.namedObject(AbstractXContentParser.java:402) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.index.query.QueryParseContext.parseInnerQueryBuilder(QueryParseContext.java:122) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.index.query.WrapperQueryBuilder.doRewrite(WrapperQueryBuilder.java:167) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.index.query.AbstractQueryBuilder.rewrite(AbstractQueryBuilder.java:263) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.search.builder.SearchSourceBuilder.rewrite(SearchSourceBuilder.java:879) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.search.internal.ShardSearchLocalRequest.rewrite(ShardSearchLocalRequest.java:244) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.search.internal.ShardSearchTransportRequest.rewrite(ShardSearchTransportRequest.java:171) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.search.SearchService.createSearchContext(SearchService.java:530) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.search.SearchService.createContext(SearchService.java:479) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.search.SearchService.createAndPutContext(SearchService.java:461) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.search.SearchService.executeDfsPhase(SearchService.java:226) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.action.search.SearchTransportService$5.messageReceived(SearchTransportService.java:332) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.action.search.SearchTransportService$5.messageReceived(SearchTransportService.java:329) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.transport.RequestHandlerRegistry.processMessageReceived(RequestHandlerRegistry.java:69) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.transport.TransportService$7.doRun(TransportService.java:662) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:675) ~[elasticsearch-5.6.10.jar:5.6.10]
at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) ~[elasticsearch-5.6.10.jar:5.6.10]
... 3 common frames omitted

我不能使用术语查询，因为数组大小是可变的，因此无法检查每个元素当我使用邮递员在弹性搜索上直接运行查询时，它会起作用。

我编写任何错误的查询时，都无法在线找到任何来源

Answer 1

根据the documentation for the @Query annotation，如果您打算使用String参数，则必须自己添加双引号：

示例54。使用@Query注释在方法中声明查询。

public interface BookRepository extends ElasticsearchRepository<Book, String> {
    @Query("{"bool" : {"must" : {"field" : {"name" : "?0"}}}}")
    Page<Book> findByName(String name,Pageable pageable);
}

_{注意：示例代码无法正确转义引号，我创建了DATAES-546来解决此问题。}

这也解释了您收到的错误，因为您实际上是在发送{"language": en}而不是{"language": "en"}。唯一可能的未加引号的值为null，true或false（因此出现错误消息）。

您可以使用以下方法解决此问题：

@Query("{ \"bool\" : { \"must\" : [\t{ \"term\" : {\"userId\" : ?0 } },\t{ \"terms\" : { \"language\" : \"?1\" } } ] } }")
List<PostElastic> findByProviderIdAndLanguagesPostOrderLessThanFromId(Long providerId, List<String> languages, Long fromTimestamp,Pageable pageable);

如何在自定义弹性搜索查询Java中使用术语查询？

1 个答案: