ElasticSearch Make Field non-searchable from java

Question

I am currently working on elastic search through my java Application . I know how to index the Java pojo using RestHighLevelClient. How i can make search only on new fields not the complete pojo.?

    public class Employee{ 
        private long id;
        private String name;
        private String designation;
        private String address;       //want to index but not searchable in elastic search    
     }

My Code for indexing is below which is working fine:

 public String saveToEs(Employee employee) throws IOException {
    Map<String, Object> map = objectMapper.convertValue(employee, Map.class);

    IndexRequest indexRequest =
        new IndexRequest(INDEX, TYPE, employee.getId().toString()).source(map, XContentType.JSON);


    IndexResponse indexResponse = client.index(indexRequest, RequestOptions.DEFAULT);

I need to do this in java .Any help please or good link ?

Answer 1

Writing another answer for RestHighLevelClient As another answer is useful for people not using the Rest client and adding this in the first answer makes it too long.

Note: you are passing the type which is deprecated in ES 7.X and I am using the ES 7.X version, so my code is according to 7.X.

        CreateIndexRequest request = new CreateIndexRequest("employee");
        Map<String, Object> name = new HashMap<>();
        name.put("type", "text");
        Map<String, Object> address = new HashMap<>();
        address.put("type", "text");
        address.put("index", false);

        Map<String, Object> properties = new HashMap<>();
        properties.put("name", name);
        properties.put("address", address);
        Map<String, Object> mapping = new HashMap<>();
        mapping.put("properties", properties);
        request.mapping(mapping);
        CreateIndexResponse createIndexResponse = client.indices().create(request, RequestOptions.DEFAULT);

Important points

• I've used only 2 fields for illustration purpose, one of which is address field which is not searchable, and to do that I used, address.put("index", false); , while name is searchable field and there this option isn't present.
• I've created index mapping using the Map method which is available in this official ES doc.
• you can check the mapping created by this code, using mapping REST API.
• Below is the mapping generated for this code in my system and you can see, index: false is added in the address field.

{
  "employee": {
    "mappings": {
      "properties": {
        "address": {
          "type": "text",
          "index": false
        },
        "name": {
          "type": "text"
        }
      }
    }
  }
}

• You can just use the same search JSON mentioned in the previous answer, to test that it's not searchable.