How do we use suggest api for Query using Java api client in elasticsearch?

Question

The documentation says nothing on how to use the new suggest api with Java Api client (not the high level rest client). The index is very simple. Here is the mapping

{
  "mappings": {
      "properties": {
        "name": {
          "type": "completion",
          "contexts": [
            {
              "name": "place_type",
              "type": "category"
            }
          ]
        },
        "entityId": {
          "type": "keyword"
        }
      }
    
  }
}

I am using a basic prefix with context filtering

{
  "suggest": {
    "place_suggestion": {
      "prefix": "oli",
      "completion": {
        "field": "name",
        "size": 10,
        "contexts": {
          "place_type": [ "d2c" ]
        }
      }
    }
  }
}

Can anyone help me with the java code snippet for the same search query. Elastic client version : 7.17.6 Using the following elastic client : https://www.elastic.co/guide/en/elasticsearch/client/java-api-client/7.17/connecting.html

Toni · Accepted Answer · 2023-06-29 08:38:16Z

2

Try this code:

Map<String, List<CompletionContext>> mapContext = new HashMap<>();
    mapContext.put("place_type", List.of(CompletionContext.of(cc -> cc.context(ctx -> ctx.category("d2c")))));

Map<String, FieldSuggester> map = new HashMap<>();
map.put("place_suggestion", FieldSuggester.of(fs -> fs
    .completion(cs -> cs.skipDuplicates(true)
        .size(5)
        .field("name")
        .contexts(mapContext)
    )
));

Suggester suggester = Suggester.of(s -> s
    .suggesters(map)
    .text("oli")
);

var response = client.search(s ->
        s.index("idx_test")
            .suggest(suggester)
    , Void.class);

var suggestions = response.suggest().get("place_suggestion");

for (var suggest : suggestions) {
  for (var option : suggest.completion().options()) {
    System.out.println("suggestion: " + option.text());
  }
}

edited Jun 29, 2023 at 8:38

Toni

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answered Dec 19, 2022 at 15:17

rabbitbr

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1 Comment

Yatin Over a year ago

Thanks for answering @rabbitbr. The pojo you have used in response "MovieSuggest" can you share the structure of that? does elastic api also provide full response pojo because I beleive this is something standard so why do we need to create our pojo from scratch? and if we need then what are the mandatory varaible we should keep in it?

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