听起来您可能没有在为文档建立索引 之前
将类型的映射显式地放入索引中，所以Elasticsearch已基于所看到文档中字段的默认映射来推断该映射。例如，给定以下类型
[ElasticType(Name = "importFile")]public class importFile{ [ElasticProperty(Store = false, Index = FieldIndexOption.NotAnalyzed)] public string FileName { get; set; } [ElasticProperty(Store = false, Index = FieldIndexOption.NotAnalyzed)] public string GroupId { get; set; } [ElasticProperty(Store = true, Index = FieldIndexOption.Analyzed)] public string FilePath { get; set; }}如果我们按以下方式索引一些文档
void Main(){ var settings = new ConnectionSettings(new Uri("http://localhost:9200")); var client = new ElasticClient(settings); client.Index<importFile>( new importFile{ FileName = "Group-1.uhh", FilePath = "", GroupId = "0ae1206d0644eabd82ae490e612732df" + "5da2cd141fdee70dc64207f86c96094" }, index => index .Index("reviewer-bdd-test-index") .Type("importFile") .Refresh()); client.Index<importFile>( new importFile { FileName = "group-1.uhh", FilePath = "", GroupId = "0ae1206d0644eabd82ae490e612732df" + "5da2cd141fdee70dc64207f86c96094" }, index => index .Index("reviewer-bdd-test-index") .Type("importFile") .Refresh()); var results = client.Search<importFile>(s => s .Index("reviewer-bdd-test-index") .Type("importFile") .Query(q => q .Filtered(fq => fq .Filter(f => f .Term(p => p.FileName, "Group-1.uhh") ) ) ) ); Console.WriteLine(string.Format("{0} {1}", results.RequestInformation.RequestMethod, results.RequestInformation.RequestUrl)); Console.WriteLine(Encoding.UTF8.GetString(results.RequestInformation.Request)); Console.WriteLine("Matching document count: {0}", results.documents.Count());}在控制台中输出以下内容
POST http://localhost:9200/reviewer-bdd-test-index/importFile/_search{ "query": { "filtered": { "filter": { "term": { "fileName": "Group-1.uhh" } } } }}Matching document count: 0我们没有匹配的文件。在Elasticsearch中检查映射
curl -XGET "http://localhost:9200/reviewer-bdd-test-index/_mapping"
我们看到类型的映射
importFile是
{ "reviewer-bdd-test-index": { "mappings": { "importFile": { "properties": { "fileName": { "type": "string" }, "groupId": { "type": "string" } } } } }}这不是我们所期望的；
fileName和两者
groupId都应有
"index":"not_analyzed"，
filePath甚至不在映射中。这两个都是因为Elasticsearch已根据传递的文档推断了映射-
fileName并
groupId已映射为字符串类型并且将使用标准分析器进行分析，并且 我相信
filePath尚未映射，因为两个看到的文档都为空字段的字符串值，因此应用于该字段的
标准分析器 不会为倒排索引生成任何标记，因此该字段不包含在映射中。
因此，为了确保一切正常，我们需要在索引任何文档之前向索引添加一个映射
void Main(){ var settings = new ConnectionSettings(new Uri("http://localhost:9200")); var client = new ElasticClient(settings); // Add the mapping for importFile to the index client.CreateIndex(indexSelector => indexSelector .Index("reviewer-bdd-test-index") .AddMapping<importFile>(mapping => mapping .MapFromAttributes() ) ); // ... Same as above after this point}导致
POST http://localhost:9200/reviewer-bdd-test-index/importFile/_search{ "query": { "filtered": { "filter": { "term": { "fileName": "Group-1.uhh" } } } }}Matching document count: 1成功！ 我们有一个匹配的文件。检查Elasticsearch中的映射会产生我们期望的结果
{ "reviewer-bdd-test-index": { "mappings": { "importFile": { "properties": { "fileName": { "type": "string", "index": "not_analyzed" }, "filePath": { "type": "string", "store": true }, "groupId": { "type": "string", "index": "not_analyzed" } } } } }}此外，可以将属性映射替换为流畅的映射
var indexResult = client.CreateIndex(indexDescriptor => indexDescriptor .Index("reviewer-bdd-test-index") .AddMapping<importFile>(mapping => mapping .Type("importFile") .MapFromAttributes() .Properties(properties => properties .String(s => s .Name(file => file.FileName) .Store(false) .Index(FieldIndexOption.NotAnalyzed)) .String(s => s .Name(file => file.GroupId) .Store(false) .Index(FieldIndexOption.NotAnalyzed)) .String(s => s .Name(file => file.FilePath) .Store(true)) ) ));属性映射或流畅映射都可以在这一点上完成，但是有些事情只能通过流畅映射来实现，例如
multi_fields
。
