Question

ES新手在这里（从SolrNet世界过渡，所以我正在寻找具有类似语法的指针）

任何人都可以帮助制定一个看起来像下面的代码片段的查询而不用 lambdas。不幸的是，普通的旧OI语法中只有很少的例子，我被卡住了......

我如何制定一组布尔范围查询，在solrnet中我会做这样的事情来获得属于某个价格范围的项目：

    List<ISolrQuery> queryList = new List<ISolrQuery>();
    double[] priceList = GetPrices(..) //double array
    for (int i = 1; i <= 10; i++)
    {
        queryList.Add(new solr.Query(new SolrQueryByRange<double>("price", priceList[i] * 0.95, priceList[i] * 1.15));
    }

    var results = _solr.Query(new SolrMultipleCriteriaQuery(queryList), new QueryOptions
    {
        Rows = 50,
        Fields = new[] { "Item", "Created", "Price" },
    });

任何人都可以帮助进行等效的Elasticsearch / Nest查询吗？

Answer 1

如下所示

void Main()
{
    var client = new ElasticClient(connection: new InMemoryConnection());

    // prices from your GetPrices method...
    var prices = new[] { 1d, 2d };

    var searchRequest = new SearchRequest<Document>("index", "document")
    {
        Fields = new List<Nest.PropertyPathMarker>{ "Item", "Created", "Price" },
        Size = 50,
        Query = new BoolQuery
        {
            Should = prices.Select(p => new RangeQuery
            {
                Field = "price",
                GreaterThanOrEqualTo = (p * 0.95).ToString(),
                LowerThanOrEqualTo = (p * 1.15).ToString()
            }.ToContainer())
        }.ToContainer()
    };

    var result = client.Search<Document>(searchRequest);

    Console.WriteLine(Encoding.UTF8.GetString(result.RequestInformation.Request));
}

public class Document
{
    public string Item { get; set; }
    public DateTime Created { get; set;}
    public double Price {get; set;}
}

这会搜索索引"document"中的"index"类型（强烈输入您的Document POCO），使用bool query并根据价格构建范围的条款 - 如果文档的price字段属于任何一个范围，它将被视为匹配。

上面NEST查询得到的查询DSL是

{
  "size": 50,
  "fields": [
    "Item",
    "Created",
    "Price"
  ],
  "query": {
    "bool": {
      "should": [
        {
          "range": {
            "price": {
              "gte": "0.95",
              "lte": "1.15"
            }
          }
        },
        {
          "range": {
            "price": {
              "gte": "1.9",
              "lte": "2.3"
            }
          }
        }
      ]
    }
  }
}

Elasticsearch / Nest - 组合多个范围查询（OIC语法）

1 个答案: