Fetch all record including particular fields

Question

I am working with Elasticcsearch 7.3. I want to fetch only two records of all the documents using JAVA Api from my index. I am using the following code but it returning the null object.

        RestHighLevelClient client;

        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.fetchSource("recipe_ID,recipe_url", null);
        sourceBuilder.from(0);
        SearchRequest searchRequest = new SearchRequest("recipes");
        searchRequest.source(sourceBuilder);

        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);

        SearchHit searchHit = searchResponse.getHits().getAt(0);

        String resultString = searchHit.getSourceAsString();

        return resultString;

I need to include only two fields recipe_ID and recipe_url in my result.

score 1 · Answer 1 · answered May 29 '20 at 03:21

1

You're on the right path, although source filtering requires you to specify your fields in an array like this:

    String[] includeFields = new String[] {"recipe_ID", "recipe_url"};
    sourceBuilder.fetchSource(includeFields, null);

answered May 29 '20 at 03:21

Val

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I want it to return the values of just these fields from all of the documents. How could I do so ? – Lily Jun 21 '20 at 17:04
That's what the above code does. Have you tried it? – Val Jun 21 '20 at 18:22
It returns me 0 hits. – Lily Jun 21 '20 at 18:36
Are you sure you actually have something in your index? – Val Jun 21 '20 at 19:06

Fetch all record including particular fields

1 Answers1