如何从Elasticsearch响应中读取距离

Question

我正在使用 Elasticsearch V6 ， NEST V6 。

我正在如下搜索ES，并且正在使用ScriptFields计算距离并将结果包括在内。

var response = await _pacienteTable.InsertAsync(novoPaciente);

if (response.IsSuccessStatusCode) {
    var content = await response.Content.ReadAsStringAsync ();
}
else
{
//Here handle the error code
throw new WebException(AppResources.MensagemFalhaConexaoServidorAzure);
}

现在，我正在尝试读取搜索结果，但不确定如何读取响应的距离，这就是我尝试过的方法：

var searchResponse = _elasticClient.Search<MyDocument>(new SearchRequest<MyDocument>
{
    Query = new BoolQuery
    {
        Must = new QueryContainer[] { matchQuery },
        Filter = new QueryContainer[] { filterQuery },
    },
    Source = new SourceFilter
    {
        Includes = resultFields    // fields to be included in the result
    },
    ScriptFields = new ScriptField
    {
        Script = new InlineScript("doc['geoLocation'].planeDistance(params.lat, params.lng) * 0.001")   // divide by 1000 to convert to km
        {
            Lang = "painless",
            Params = new FluentDictionary<string, object>
            {
                { "lat", _center.Latitude },
                { "lng", _center.Longitude }
            }
        }
    }
});

调试时我可以看到距离值，但是我不确定如何读取该值？

Answer 1

我找到了答案here

要阅读搜索文档和距离：

foreach (var hit in searchResponse.Hits)
{
    MyDocument doc = hit.Source;    
    double distance = hit.Fields.Value<double>("distance");  
}

如果您只对距离感兴趣：

foreach (var fieldValues in searchResponse.Fields)
{
    var distance = fieldValues.Value<double>("distance");
}