C# Lucene.Net IndexWriter.DeleteDocuments 不工作

Question

我正在尝试使用 Lucene.Net 构建索引操作，并且我正在逐步测试代码，

private void CRUDIndex()
    {


        FSDirectory directory = FSDirectory.Open(new DirectoryInfo(Path), new NativeFSLockFactory());


        bool isExist = IndexReader.IndexExists(directory);
        if (isExist)
        {
            if (IndexWriter.IsLocked(directory))
            {
                IndexWriter.Unlock(directory);
            }
        }
        IndexWriter writer = new IndexWriter(directory, new PanGuAnalyzer(), !isExist, IndexWriter.MaxFieldLength.UNLIMITED);
        while (bookQueue.Count > 0)
        {
if (book.IT == IndexType.Insert)
            {
                document.Add(new Field("id", book.ID.ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED));
                document.Add(new Field("title", book.Title, Field.Store.YES, Field.Index.ANALYZED,
                                       Field.TermVector.WITH_POSITIONS_OFFSETS));
                document.Add(new Field("content", book.Starring, Field.Store.YES, Field.Index.ANALYZED,
                                       Field.TermVector.WITH_POSITIONS_OFFSETS));
                writer.AddDocument(document);
            }
            else if (book.IT == IndexType.Delete)
            {


                writer.DeleteDocuments(new Term("id", book.ID.ToString()));
                writer.Optimize();
                //writer.Commit();
                writer.Flush(true, true, true);
                //writer.Dispose();
            }
}
        writer.Dispose();
        directory.Dispose();
    }

发现request通过Delete documents方法后，document还存在，writer.deletedocuments不行，我也试过添加Flush和commit，还是不行working.What在这种情况下怎么办？

Answer 1

尝试用这种方式删除您的文档，您也可以将目录对象作为参数传递给 ClearLuceneIndexRecord 方法。

public static void ClearLuceneIndexRecord(int record_id)
 {
   // init lucene
   var analyzer = new PanGuAnalyzer();
   using (var writer = new IndexWriter(_directory, analyzer, IndexWriter.MaxFieldLength.UNLIMITED))
   {
     // remove older index entry
     var DocIdToDelete= new TermQuery(new Term("id", record_id.ToString()));
     writer.DeleteDocuments(DocIdToDelete);
     // close handles
     analyzer.Close();
     writer.Dispose();
   }
}

希望对您有所帮助！

Answer 2

您的搜索方式不清晰，所以我的同样问题已通过以下方式解决：

使用 writer.Flush(...) （你做到了）
提交所有索引更改：writer.Commit() （此行已在您的代码中注释）
调用：_searchManager.MaybeRefreshBlocking();（推荐）

在代码中：

    writer.Flush(true, true);
    writer.Commit();

然后，在新搜索中：

    _searchManager.MaybeRefreshBlocking();

    var searcher = _searchManager.Acquire();
    try
    {
        var topDocs = searcher.Search(query, 10);

        // ... do your search logic here ...
    }
    finally
    {
        _searchManager.Release(searcher);
        searcher = null;
    }

C# Lucene.Net IndexWriter.DeleteDocuments 不工作

C# Lucene.Net IndexWriter.DeleteDocuments not working

c#

lucene.net