Using NEST - No Results

Elastic Stack Elasticsearch
10

It's not clear how you would like suggesters to work in your case. The simplest approach to start with is to:

  1. Map a field with the completion datatype

    public class Question
{
    public CompletionField TitleSuggest { get; set; }
}

var createIndexResponse = client.CreateIndex("my_index", c => c
    .Mappings(m => m
        .Map<Question>(u => u
            .AutoMap()
        )
    )
);

  2. Index a document with completion inputs

    var question = new Question
{
    TitleSuggest = new CompletionField
    {
        Input = new[] { "This is the title" },
        Weight = 5
    }
};

client.Index(question, i => i.Index("my_index").Refresh(Refresh.WaitFor));

  3. Search using the completion suggester

    var response = client.Search<Question>(s => s
	.Index("my_index")
    .Suggest(su => su
		.Completion("suggested_titles", cs => cs
			.Field(f => f.TitleSuggest)
			.Prefix("This is")
			.Fuzzy(f => f
				.Fuzziness(Fuzziness.Auto)
			)
			.Size(5)
		)
    )
);

// do something with suggestions
var suggestions =
    from suggest in response.Suggest["suggested_titles"]
    from option in suggest.Options
    select new
    {
        Id = option.Source.Id,
        Text = option.Text
    };