[英]Lucene .NET Search returns no Results
我一直試圖讓 Lucene .NET 在我的 API 中工作,但它總是返回 0 結果。 我在這里寫的所有內容都封裝在我的 API 控制器使用的單例服務中。
我如何創建索引:
public async Task<bool> CreateSearchArtefacts()
{
var analyzer = new StandardAnalyzer(AppLuceneVersion);
var indexConfig = new IndexWriterConfig(AppLuceneVersion, analyzer);
using (var dir = FSDirectory.Open(IndexPath))
{
using (IndexWriter writer = new IndexWriter(dir, indexConfig))
{
foreach (var element in this.data)
{
Document doc = new Document
{
new TextField("Title", element.Title, Field.Store.YES),
new StringField("Author", element.Author, Field.Store.YES),
new TextField("Description", element.Description, Field.Store.NO)
};
writer.AddDocument(doc);
this.logger.LogInformation(element.Title + " added.");
}
this.logger.LogInformation("All Books added.");
writer.Commit();
};
};
return true;
}
這就是我搜索它的方式:
public async Task<SearchResultsCollection> SearchSingleTerms(string term, string search, int count)
{
this.logger.LogInformation("Searching Term "+ term + " for " + search);
var phrase = new TermQuery(new Term(term, search));
var analyzer = new StandardAnalyzer(AppLuceneVersion);
var indexConfig = new IndexWriterConfig(AppLuceneVersion, analyzer);
var sendList = new List<SearchResult>();
using (var dir = FSDirectory.Open(IndexPath))
{
using (var writer = new IndexWriter(dir, indexConfig))
{
var reader = writer.GetReader(true);
var searcher = new IndexSearcher(reader);
var hits = searcher.Search(phrase, count /* top 20 */).ScoreDocs;
this.logger.LogInformation("Results found: " + hits.Length);
foreach (var item in hits)
{
var foundDoc = searcher.Doc(item.Doc);
sendList.Add(new SearchResult()
{
Author = foundDoc.Get("Author"),
Title = foundDoc.Get("Title"),
Description = foundDoc.Get("Description")
});
}
writer.Flush(triggerMerge: false, applyAllDeletes: false);
};
};
return new SearchResultsCollection() { Count = count, Results = sendList.ToArray() };
}
我在 .NET Core 3.1 中使用 Lucene.Net 4.8.0-beta00014
任何幫助表示贊賞!
找到了。 我必須將短語的字符串參數轉換為字符串值。
public async Task<SearchResultsCollection> SearchSingleTerms(string term, string search, int count)
{
this.logger.LogInformation("Searching Term "+ term + " for " + search);
var phrase = new TermQuery(new Term(term.ToString(), search.ToString()));
var analyzer = new StandardAnalyzer(AppLuceneVersion);
var indexConfig = new IndexWriterConfig(AppLuceneVersion, analyzer);
var sendList = new List<SearchResult>();
using (var dir = FSDirectory.Open(IndexPath))
{
using (var writer = new IndexWriter(dir, indexConfig))
{
var reader = writer.GetReader(true);
var searcher = new IndexSearcher(reader);
var hits = searcher.Search(phrase, count /* top 20 */).ScoreDocs;
this.logger.LogInformation("Results found: " + hits.Length);
foreach (var item in hits)
{
var foundDoc = searcher.Doc(item.Doc);
sendList.Add(new SearchResult()
{
Author = foundDoc.Get("Author"),
Title = foundDoc.Get("Title"),
Description = foundDoc.Get("Description")
});
}
writer.Flush(triggerMerge: false, applyAllDeletes: false);
};
};
return new SearchResultsCollection() { Count = count, Results = sendList.ToArray() };
}
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