Elasticsearch NEST Suggester parser(s) not found

Question

I'm attempting to utilize Elasticsearch's 'Suggester' functionality.

Using Phrase, Term, or Completion I always get the following error variation.

unable to parse SuggestionBuilder with name [COMPLETION]: parser not found"
unable to parse SuggestionBuilder with name [TERM]: parser not found"
unable to parse SuggestionBuilder with name [PHRASE]: parser not found"

I have tried multiple 6.x NEST versions and they all have the same issue. Upgrading to 7.0alpha1 does change the error, but seems to cause a myriad of other issues, and I rather not use an alpha library in production.

I'm currently following this tutorial and working it into my existing code: https://github.com/elastic/elasticsearch-net-example/tree/6.x-codecomplete-netcore#part-6-suggestions

Currently using NEST 6.1

Model:

public class SearchResult {

      public SearchResult()
                {
                    TitleSuggest = new CompletionField {Input = new List<string>(Title.Split(' '))};
                }
                public CompletionField TitleSuggest { get; set; }
        //etc
        }

Index Method:

public async Task<IActionResult> CreateIndex()
        {
            await _searchClient.CreateIndexAsync(SearchIndexName, indexSelector =>
                indexSelector
                    .Mappings(mappingsDescriptor =>
                        mappingsDescriptor.Map<Models.SearchResult>(y => y.AutoMap().Properties(pr=>pr.Completion(c => c.Name(p => p.TitleSuggest)
                        ))))

Suggest Method:

public async Task<ISearchResponse<SearchResult>> Suggest(string keyword)
        {
return await _searchClient.SearchAsync<SearchResult>(
                s =>
                        s.Suggest(ss => ss
                            .Completion("title", cs => cs
                                .Field(f => f.TitleSuggest)
                                .Prefix(keyword)
                                .Fuzzy(f => f
                                    .Fuzziness(Fuzziness.Auto)
                                )
                                .Size(5))
}

I'm having a hard time deciphering the error. It seems as though the NEST libraries are missing the Suggester parsers? Any help would be great, thanks!

Answer 1

As a follow up, @RussCam answered my question here

I had a ConnectionSetting (DefaultFieldNameInferrer) that was uppercasing my suggester

private IElasticClient ElasticClient(IConfiguration _config, string defaultIndex)
{
  var settings = new ConnectionSettings(new Uri(_config.GetSection("Search:Url").Value))
    .BasicAuthentication(_config.GetSection("Search:User").Value, _config.GetSection("Search:Password").Value)
    .DefaultIndex(_config.GetSection(defaultIndex).Value);
  //settings.DefaultFieldNameInferrer(p => p.ToUpper(CultureInfo.CurrentCulture));

  //Enable ElasticSearch Debugging
  settings.PrettyJson().DisableDirectStreaming();

  return new ElasticClient(settings);
}