elastic/elasticsearch

Highlighting array field - Also return non-matching entries

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#7416 opened on Aug 22, 2014

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 (31 comments) (27 reactions) (0 assignees)Java (76,700 stars) (25,882 forks)batch import
:Search Relevance/Highlighting>enhancementTeam:Search Relevancegood first issuehelp wanted

Description

I have an array field with the entries [foo, foobar, bar] and search for foo. The highlighting then returns for that field

[<em>foo</em>, <em>foo</em>bar]

I would like it to return

[<em>foo</em>, <em>foo</em>bar, bar]

I did try to set no_match_size as described on http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-highlighting.html but that didn't work. Is there any way to make elasticsearch behave the way I want?

Contributor guide

Tech stack
java
Domain
backendsearch
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Elasticsearch highlighting basicsJavaREST API concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
Review the issue comments for previous discussions and attempts. Examine the highlighting code in Elasticsearch's search module, particularly the handling of array fields and no match size. Understand how the current implementation returns only matching entries and design a change to include non matching entries.