Question

我需要使用具有多个相似条件的NEST客户端从ES获取文档。

我的查询如下：

SELECT * FROM Customer WHERE CustomerName LIKE '%john%' OR CustomerName Like '%george%'

我的弹性搜索NEST查询（对于单个操作）如下：

var customers= ElasticSearchHelper.ElasticClient.SearchAsync<Customer>(body => body
                .Take(100000)
                .Filter(f => f
                    .And
                    (
                       fs=> fs.Query(q=> .QueryString(qs => qs
                                .Query("*" + SearchText + "*")
                                .OnField(new string[] { "FirstName"})
                                .DefaultOperator(Operator.or)
                                .MinimumShouldMatchPercentage(100)
                                .AnalyzeWildcard(true)))
                    )));
            return customers.Documents;

如何在单个字段上执行多个类似操作？请指导我做错了什么。

Answer 1

您需要使用的是OR过滤器与Regex过滤器结合使用：

SearchDescriptor<T> searchDescriptor = new SearchDescriptor<T>();
FilterDescriptor<T> filterDescriptor = new FilterDescriptor<T>();

FilterContainer filterContainer1 = new FilterContainer();
filterContainer1 = filterDescriptor.Regexp(rg => 
                    rg.OnField("CustomerName").Value(".*" + "john" + ".*"));

FilterContainer filterContainer2 = new FilterContainer();
filterContainer2 = filterDescriptor.Regexp(rg => 
                    rg.OnField("CustomerName").Value(".*" + "george" + ".*"));

searchDescriptor.Filter(flt => 
            flt.Or(filterContainer1, filterContainer2));

var resulet = this.ElasticClient().Search<T>(body => searchDescriptor);

将生成以下查询（T是您的文档类型）：

  {
      "filter": {
        "or": {
          "filters": [
            {
              "regexp": {
                "CustomerName": {
                  "value": ".*john.*"
                }
              }
            },
            {
              "regexp": {
                "CustomerName": {
                  "value": ".*doe.*"
                }
              }
            }
          ]
        }
      }
    }

使用elasticsearch NEST在QueryString查询中有多个值

1 个答案: