elastic search 5.5 highlight field is not working

问题:

I have tested the elastic search highlight field function and it was working fine . I used elastic search 2.4.4 and spring-data-elasticsearch-2.0.0.RELEASE

The sample code is in the below post

How to provide highlighting with Spring data elasticsearch

I have recently upgraded to elastic search to 5.5.0 and spring-data-elasticsearch-3.0.0.M4

when I test the same code , highlight does not happen

Below is the sample code

SearchQuery searchQuery = new NativeSearchQueryBuilder().withIndices("occindex")                 .withPageable(new PageRequest(0, mySpecification.getNoOfRecords()))                 .withQuery(QueryBuilders.multiMatchQuery(                         searchText.toLowerCase()).field("transformedTitle", 10.0f).                         minimumShouldMatch("50%").fuzziness(Fuzziness.ONE).prefixLength(3)                         .field("transformedDesription").type(MultiMatchQueryBuilder.Type.BEST_FIELDS))                 .withHighlightFields(                         new HighlightBuilder.Field("transformedTitle").preTags("<span style='background-color: #FFFF00'>")                                 .postTags("</span>"),                         new HighlightBuilder.Field("transformedDesription").fragmentSize(250).numOfFragments(3)                                 .preTags("<span style='background-color: #FFFF00'>").postTags("</span>"))                 .build();             Page<MyResultRecord> sampleEntities = elasticsearchTemplate.queryForPage(searchQuery,                 MyResultRecord.class, new SearchResultMapper() {                     @Override                     public <T> AggregatedPage<T> mapResults(SearchResponse response, Class<T> clazz, Pageable pageable) {                         List<MyResultRecord> chunk = new ArrayList<MyResultRecord>();                         for (SearchHit searchHit : response.getHits()) {                             if (response.getHits().getHits().length <= 0) {                                 return null;                             }                             MyResultRecord myResultRecord = new MyResultRecord();                             myResultRecord.setRecordId(searchHit.getId());                              Map<String, Object> source = searchHit.getSource();                             myResultRecord.setRisk((String) source.get("actualRisk"));                              String highlightedTitle = null;                             System.out.println( " Check the highlighted fileds  " + searchHit.getHighlightFields());                             System.out.println( " Is this null ?? " + searchHit.getHighlightFields().get("transformedTitle"));                              if (searchHit.getHighlightFields().get("transformedTitle") != null)                                 highlightedTitle = searchHit.getHighlightFields().get("transformedTitle").fragments()[0]                                         .toString();                             else                                 highlightedTitle = (String) source.get("transformedTitle");                              myResultRecord.setHighlightedTitle(highlightedTitle);                             myResultRecord.setScore(searchHit.getScore());                              chunk.add(myResultRecord);                         }                         if (chunk.size() > 0) {                             return new AggregatedPageImpl(chunk);                         }                         return null;                     }                 }); 

Is there any code change needed in order to highlight fields in elastic search 5.5.0 ?

When I print the query in the elastic search log , I find that only one highlight field is passed to Elastic Search

{      "from":0,    "size":2,    "query":{         "multi_match":{            "query":" My Query String",          "fields":[               "transformedDesription^1.0",             "transformedTitle^1.0"          ],          "type":"best_fields",          "operator":"OR",          "slop":0,          "prefix_length":0,          "max_expansions":50,          "lenient":false,          "zero_terms_query":"NONE",          "boost":1.0       }    },    "highlight":{         "fields":{            "transformedDesription":{               "pre_tags":[                  "<bold>"             ],             "post_tags":[                  "</bold>"             ]          }       }    } } 

When I debugged , I observed that NativeSearchQuery has two highlighted fields , but the final query sent to Elastic Search has only request for one highlight field.

回答1:

Made it work by changing the below code in org.springframework.data.elasticsearch.core.ElasticsearchTemplate.doSearch

Existing Code

if (searchQuery.getHighlightFields() != null) {             for (HighlightBuilder.Field highlightField : searchQuery.getHighlightFields()) {                 searchRequest.highlighter(new HighlightBuilder().field(highlightField));             }          } 

Modified Code

if (searchQuery.getHighlightFields() != null) {             HighlightBuilder myBuilder = new HighlightBuilder();             for (HighlightBuilder.Field highlightField : searchQuery.getHighlightFields()) {                 myBuilder.field(highlightField);              }             searchRequest.highlighter(myBuilder);         } 

文章来源: elastic search 5.5 highlight field is not working