Elasticsearch NEST update by script

Question

I'm trying to update some fields by script. In Postman I'm sending the following request:

https://search.test.com/items_example/item/en_01_2/_update

the request's body:

{
  "script": {
    "inline": "ctx._source.Title = params.Title; ctx._source.Desc = params.Desc",
    "params": {
        "Title": "New Title",
        "Desc": "New Desc"
    }  
  }
}

But I have no idea how I can send this request using NEST. Can someone please help me? Elasticsearch 5.4.1 version, NEST 5.6.1

Answer 1

Update it with your index settings & query

var elasticClient = new ElasticClient(settings);
var scriptParams = new Dictionary<string, object>
{
    {"Title", "New Title"},
    {"Desc", "New Desc"}
};

var response = elasticClient
    .UpdateByQuery<dynamic>(q => q.Query(rq => rq.Term(....))
    .Script(script =>
        script.Inline(
            $"ctx._source.Title = params.Title;" +
            $"ctx._source.Desc  = params.Desc ;"
        )
    .Params(scriptParams));

Edit: If you're looking for just Update, just change the syntax to

var response = elasticClient.Update<dynamic>(
    "items_example/item/en_01_2" //This is your document path
    , request => request.Script(
        script =>
            script.Inline(
                    $"ctx._source.Title = params.Title;" +
                    $"ctx._source.Desc  = params.Desc ;"
                )
                .Params(scriptParams)));