index_not_found_exception, reason=no such index [Sugestao]] - how pass index name to reactiveElasticsearchOperations.search

Question

I am getting the error pasted in this question and it is true: there isn't Sugestao index. The proper name is sugestao (take a note S versus s).

As far as I know, I can't create a index with upper case. So far so good. The issue is: how can "force" spring-data-elasticsearch to search for sugestao instead of Sugestao since my model is a java class in uppercase? I guess it is picking up uppercase automatically.

In Spring-Data-Elasticsearch-3.2.6 (Elastic version 6.x) I can see find has a clear way to set like

reactiveElasticsearchOperations.find(
query.build(),
Sugestao.class, // this is the model class
"this_is_my_index_name" //here I can write the name of the index with lower case
)

How can I do similar approach in Spring-data-Elasticsearch.4 (Elastic version 7.x) I am trying with search since find is deprecated

    Flux<SearchHit<Sugestao>> fluxSearchHits =
            reactiveElasticsearchOperations.search(query.build(), Sugestao.class, "sugestao");

And I get

The method search(Query, Class, Class) in the type ReactiveSearchOperations is not applicable for the arguments (NativeSearchQuery, Class, String)

Some related sub-questions are:

• it seems in deprecated version of Find I could pass a String and now in search it is expecting a Class. But which class is that to set the index name?

• maybe I can set in other spring-data-elasticsearch config the name of the index or set it to use lowercase an then I can search without adding index name.

  Flux> fluxSearchHits = reactiveElasticsearchOperations.search(query.build(), Sugestao.class);

Answer 1

I suppose you don't have the @Document annotation on your entity class?

@Document(indexName="sugestao")
public class Sugestao {
  // class stuff
}

Then you can call

Flux<SearchHit<Sugestao>> fluxSearchHits =
        reactiveElasticsearchOperations.search(query.build(), Sugestao.class);

If you want to specify the index name explicitly you can use

Flux<SearchHit<Sugestao>> fluxSearchHits =
        reactiveElasticsearchOperations.search(query.build(), 
                Sugestao.class, IndexCoordinates.of("sugestao");

The API documentation for ReactiveSearchOperations has the different methods documented.