Searchkick highlights unnecessary word

Question

I'm highlighting unnecessary word for example I'm search for "Document CASE No. 2015-331" here the list that searchkick will highlight

1. "Document CASE No. 2015-331"
2. "Not"
3. "no"
4. "on"
5. "case is"<----- this is very weird i dont know why this is
6. highlighted lol
7. "2015"
8. "2017"
9. "2018"
10. "2016"
11. "to"
12. "Not to"

here's what's my search looks like

    search = ::Document.search params[:q], fields: [:content], where: {id:
     params[:id]}, highlight: { tag: 'span class=match-matcher',
     fragment_size: @document.content.length}

    search.with_highlights.each do |document, highlights|

       document.content = highlights[:content]

    end

the goal here to highlight the "Document CASE No. 2015-331" only

Answer 1

Looks like your field has been analyzed when indexed. If you want to achieve the exact match and tokens should be searchable the mapping should be "not_analyzed" and the data needs to be re-indexed.

Here you are looking for exact match.

Modify the mapping for you field by adding something like below.

"mappings": {
    "properties": {
       "city": {
        "type": "text",
         "fields": {
           "raw": { 
             "type":  "keyword"
           }
          }
        }
      }
    }