Nest DeleteByQuery without the Object name

Question

I want to send a Nest delete request to elasticsearch without specifying the object which I don't have. I've seen solutions like:

var response = elasticClient.DeleteByQuery<MyClass>(q => q                
            .Match(m => m.OnField(f => f.Guid).Equals(someObject.Guid))            
            );

From: DeleteByQuery using NEST and ElasticSearch

As I'm just reading plain text from a queue I don't have access to the MyClass object to use with the delete request. Basically I just want to delete all documents in an index (whose name I know) where a variable matches for example ordId = 1234. Something like:

    var response = client.DeleteByQuery<string>( q => q
        .Index(indexName)
        .AllTypes()
        .Routing(route)
        .Query(rq => rq
            .Term("orgId", "1234"))
    );

I see that the nest IElasticClient interface does have a DeleteByQuery method that doesn't require the mapping object but just not sure how to implement it.

Answer 1

You can just specify object as the document type T for DeleteByQuery<T> - just be sure to explicitly provide the index name and type name to target in this case. T is used to provide strongly type access within the body of the request only. For example,

var client = new ElasticClient();

var deleteByQueryResponse = client.DeleteByQuery<object>(d => d
    .Index("index-name")
    .Type("type-name")
    .Query(q => q
        .Term("orgId", "1234")
    )
);

Will generate the following query

POST http://localhost:9200/index-name/type-name/_delete_by_query
{
  "query": {
    "term": {
      "orgId": {
        "value": "1234"
      }
    }
  }
}

Replace _delete_by_query with _search in the URI first, to ensure you're targeting the expected documents :)