CompletionSuggester to find search suggestions

2021-11-24T15:28:34Z

(Liferay 7.2) I have a development in which autocomplete is required in the search input of the SearchBar. To do this, we are implementing a resource that is responsible for obtaining the suggestions as the user writes. Both the spell checker and the PhraseSuggester give me results but not all the expected ones. Also, I don't see how to use a CompletionSuggester.

If I do an index search: http://localhost:9200/_search?pretty=true&q=crisis AND type:querySuggestion

I get this hits:

"hits": { "total": 2, "max_score": 11.147705, "hits": [ { "_index": "liferay-20101", "_type": "LiferayDocumentType", "_id": "20101_keywordSearch_De/BW/dejFNL0siq+HU2Ew==", "_score": 11.147705, "_source": { "keywordSearch_es_ES": "crisis", "uid": "20101_keywordSearch_De/BW/dejFNL0siq+HU2Ew==", "companyId": "20101", "groupId": "0", "languageId": "es_ES", "priority": "0.0", "type": "querySuggestion" } }, { "_index": "liferay-20101", "_type": "LiferayDocumentType", "_id": "20101_keywordSearch_PyewLylt4i0IheiXHaUzgg==", "_score": 10.469259, "_source": { "keywordSearch_es_ES": "La crisis macabea", "uid": "20101_keywordSearch_PyewLylt4i0IheiXHaUzgg==", "companyId": "20101", "groupId": "0", "languageId": "es_ES", "priority": "0.0", "type": "querySuggestion" } } ] }

If I check with the PhraseSuggester:

PhraseSuggester suggester = new PhraseSuggester ("phraseSuggester", field, keyword);
suggester.setSize (5);
[...] = indexSearcher.suggest (searchContext, suggester);

where field = keywordSearch_es_ES and keyword = crisis
The PhraseSuggester only returns the first result, that of a word, but not the second, which is a phrase.

Without using the Phrase Suggester:

IndexSearcherHelperUtil.suggestKeywordQueries (searchContext, 10);

where in the searchContext.setKeyword ("crisis"), no results are returned
(If I search for "cirsis", it does return the result "crisis", so the search by word does it)

In the mapping that Liferay generates, I see that the field where the searches are stored, is of type text, not "completion":

"keywordSearch_es_ES": {
"type": "text",
"store": true,
"term_vector": "with_positions_offsets",
"analyzer": "spanish",
"search_analyzer": "liferay_analyzer_es"
},

Using the CompletionSuggester on the "keywordSearch_es_ES", Liferay does not allow me either. And I don't see another field in the mapping that is of type "completion"

Isn't there a way that, given a word, get all the suggestions, including sentences, where that word has been used? In the example above, let the value "crisis" get the phrase hit: "La crisis macabea"