Lucene .net搜索

Question

我有一个带有此配置的lucene .net搜索器，带有aspnet core2的net应用程序，与RamDirectory我有同样的问题。该信息仅适用于测试porpouse。

Lucene配置!!

public TextEngine(double bufferSizeMB)
{
    _analyzer = new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_30);
    _directory = FSDirectory.Open(@"d:\index");
    _writer = new IndexWriter(_directory, _analyzer, true, 
    IndexWriter.MaxFieldLength.UNLIMITED);
    _writer.SetRAMBufferSizeMB(bufferSizeMB);
   _searcher = new IndexSearcher(_directory);
}

在目录上写入数据     public void Index（出版物，                       string子类型，                       字符串省）     {       var document = new Document（）;       document.Add（new Field（                          ＆＃34;子类型＆＃34 ;,                          亚型                          Field.Store.YES，                          Field.Index.ANALYZED））;

  document.Add(new Field(
                    "province",
                    province,
                    Field.Store.YES,
                    Field.Index.ANALYZED));

  document.Add(new Field(
                     "publicationId",
                     publication.Id.ToString(),
                     Field.Store.YES,
                     Field.Index.NO));

  _writer.AddDocument(document);
}

在子类型字段

上搜索索引文本

public string[] SearchTopBy(string index, int top)
{
  var parser = new QueryParser(Lucene.Net.Util.Version.LUCENE_30, "subType", _analyzer);
  var query = new TermQuery(new Term("subType", index));
  var documents = _searcher.Search(query, top);
  var response = new List<string>();
  foreach (var document in documents.ScoreDocs)
  {
    var subtype = _searcher.Doc(document.Doc).Get("subType");
    var vecinity = _searcher.Doc(document.Doc).Get("vecinity");
    response.Add(subtype + " " + vecinity);
  }

  return response.ToArray();
}

当我编写像

这样的单元测试时

var engine = new TextEngine(1024);
var publication = new Publication
{
  Id = 1,
  IndexedDescription = "Test publication"
};

engine.Index(publication,
        "plomero",
        "almagro");

publication.Id = 2;
publication.IndexedDescription = "test 2";
engine.Index(publication,
       "plomero",
       "villa del parque");

var result = engine.SearchTopBy("plomero", 2);
Assert.True(result.Length == 2);

我期待2个结果项，但我有0个项目。 你能救我吗？

Answer 1

在将文档写入索引后，应关闭编写器。 这会将所有更改提交到索引并关闭所有关联的文件。

_writer.AddDocument(document);

_writer.Close();

请参见Apache documentation。