# Issue in highlighter API

**URL:** <https://discuss.elastic.co/t/issue-in-highlighter-api/45976>\
**Category:** Elasticsearch\
**Created:** [March 31, 2016, 5:42pm UTC](https://discuss.elastic.co/t/issue-in-highlighter-api/45976 "2016-03-31T17:42:29Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![pranesh002](https://avatars.discourse-cdn.com/v4/letter/p/48db29/32.png) [@pranesh002](https://discuss.elastic.co/u/pranesh002)\
**Post date:** [March 31, 2016, 5:42pm UTC](https://discuss.elastic.co/t/issue-in-highlighter-api/45976/1 "2016-03-31T17:42:29Z")

</div>

Hi,

I am trying use highlighter api in my application, it works fine but if my query string ends '0' then i have some issues.

```
E.g:
POST /user-x187/_search?from=0&size=10
{
    "_source" : ["policyNumer",
               "userId", "companyId", "dateOfJoining", "phoneNumber"], 
       "sort": [
       {
          "dateOfJoining": {
              "order": "desc"
          }
       }
    ], 
     "query": {
        "multi_match": {
            "query": "2345678910",
            "fields": [
               "policyNumer.raw",
               "policyNumer",
               "userId",
               "companyId",
               "phoneNumber"
            ],
            "minimum_should_match":"100"
        }
    },
    "highlight" : {
        "require_field_match": true,
        "fields" : {
            "userId" : {},
            "policyNumer":{},
            "policyNumer.raw":{},
            "companyId":{},
            "phoneNumber":{}
        }
    }
}

Result:

{
   "took": 6,
   "timed_out": false,
   "_shards": {
      "total": 5,
      "successful": 5,
      "failed": 0
   },
   "hits": {
      "total": 6,
      "max_score": null,
      "hits": [
        {
            "_index": "user-x187",
            "_type": "user",
            "_id": "SEARCH00027",
            "_score": null,
            "_source": {
               "userId": "SEARCH00027",
               "companyId": "x187",
               "phoneNumber" : "2345678910",
               "policyNumer":"23456789123456",
               "dateOfJoining" :"07/27/2014, 12:00:00 AM -0400"
            },
            "highlight": {
               "phoneNumber": [
                  "<em>2345678910</em>"
               ],
                "policyNumer": [
               "<em>234567891</em>23456"
               ]
            },
            "sort": [
               "07/27/2014, 12:00:00 AM -0400"
            ]
         }
         ]
   }
}

```

My query string is "2345678910" but it highlighted "policyNumber" which is 234567891. Any idea why it showing partial field even i put require\_field\_match is true.

Thanks  
Pranesh

---

<div class="post-metadata">

**Author:** ![javanna](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/javanna/32/4698_2.png) [@javanna](https://discuss.elastic.co/u/javanna)\
**Post date:** [April 1, 2016, 10:47am UTC](https://discuss.elastic.co/t/issue-in-highlighter-api/45976/2 "2016-04-01T10:47:54Z")

</div>

require\_field\_match doesn't have to do with getting back wrong matches, it is to say that you only want to get back highlighted fields that you actually queries in your query, otherwise only the term itself is highlighted regardless of the field that matches it (it's really not about query matches anymore).

That being said, can you post your mapping please?

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<div class="post-metadata">

**Author:** ![pranesh002](https://avatars.discourse-cdn.com/v4/letter/p/48db29/32.png) [@pranesh002](https://discuss.elastic.co/u/pranesh002)\
**Post date:** [April 1, 2016, 11:09am UTC](https://discuss.elastic.co/t/issue-in-highlighter-api/45976/3 "2016-04-01T11:09:04Z")

</div>

Thanks Luca,

My mapping is

```
{  
   "template":"user-*",
   "settings":{  
      "analysis":{  
         "tokenizer":{  
            "ngram_tokenizer":{  
               "type":"nGram",
               "min_gram":8,
               "max_gram":20
            }
         },
         "analyzer":{  
            "ngram_analyzer":{  
               "type":"custom",
               "tokenizer":"ngram_tokenizer",
               "filter":[  
                  "lowercase"
               ]
            },
            "keyword_lower_analyzer":{  
               "tokenizer":"keyword",
               "filter":"lowercase"
            }
         }
      }
   },
   "mappings":{  
      "user":{  
         "dynamic":"false",
         "_timestamp":{  
            "enabled":"true",
            "store":"true",
            "format":"YYYY-MM-DD HH:mm:ss.SSS",
            "default":"now"
         },
         "properties":{  
            "userId":{  
               "type":"string",
               "analyzer":"keyword_lower_analyzer"
            },
            "phoneNumber":{  
               "type":"string",
               "index":"not_analyzed",
               "doc_values":true
            },
            "policyNumber":{  
               "type":"string",
               "term_vector":"yes",
               "analyzer":"ngram_analyzer",
               "fields":{  
                  "raw":{  
                     "type":"string",
                     "analyzer":"keyword_lower_analyzer"
                  }
               }
            },
            "dateOfJoining":{  
               "type":"string",
               "index":"not_analyzed",
               "doc_values":true
            },
            "companyId":{  
               "type":"string",
               "index":"not_analyzed",
               "doc_values":true
            }
         }
      }
   }
}
```

---

<div class="post-metadata">

**Author:** ![javanna](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/javanna/32/4698_2.png) [@javanna](https://discuss.elastic.co/u/javanna)\
**Post date:** [April 1, 2016, 11:15am UTC](https://discuss.elastic.co/t/issue-in-highlighter-api/45976/4 "2016-04-01T11:15:58Z")

</div>

This is caused by analyzing using ngrams. If you have ngrams at index time, you should make sure that those are not applied at search time by using a different search\_analyzer in your mapping. At the moment an ngram of the query matches an ngram of the field content, while you want to get a match only if the whole query matches an ngram or the whole field content.

Cheers  
Luca

---

<div class="post-metadata">

**Author:** ![pranesh002](https://avatars.discourse-cdn.com/v4/letter/p/48db29/32.png) [@pranesh002](https://discuss.elastic.co/u/pranesh002)\
**Post date:** [April 1, 2016, 11:18am UTC](https://discuss.elastic.co/t/issue-in-highlighter-api/45976/5 "2016-04-01T11:18:45Z")

</div>

Got it!!! Thanks Luca.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 5, 2017, 11:03pm UTC](https://discuss.elastic.co/t/issue-in-highlighter-api/45976/6 "2017-07-05T23:03:18Z")

</div>