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POLucene.NET Phrase search returning no results
 

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  1. POLucene.NET Phrase search returning no results
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    <p>EDIT</p> <p>Ok I worked it out. When I was adding the terms one at a time to the PhraseQuery object it was retaining the common words. In the case it was "The".</p> <p>What I have done instead is used the QueryParser object to parse the query (including the quotation marks). This drops the common words and the phrase query now works like a charm.</p> <pre><code>List&lt;string&gt; searchList = Regex.Matches(searchTerms, @"(?&lt;match&gt;\w+)|\""(?&lt;match&gt;[\w\s]*)""") .Cast&lt;Match&gt;() .Select(m =&gt; m.Groups["match"].Value) .ToList(); QueryParser parser = new QueryParser(LuceneFields.BODY, Analyzer); BooleanQuery booleanQuery = new BooleanQuery(); // go through each term foreach (string term in searchList) { Query query = null; if (term.Contains(" ")) // multi word phrase query = parser.Parse("\"" + term + "\""); else query = parser.Parse(term); if (query.ToString() != "") booleanQuery.Add(query, BooleanClause.Occur.MUST); } </code></pre> <hr> <p>I am creating a simple search using Lucene.NET and I am having a bit of trouble getting phrase searching to work properly as I am combining it with a boolean query.</p> <p>The following code is being used to search:</p> <pre><code>List&lt;string&gt; searchList = Regex.Matches(searchTerms, @"(?&lt;match&gt;\w+)|\""(?&lt;match&gt;[\w\s]*)""") .Cast&lt;Match&gt;() .Select(m =&gt; m.Groups["match"].Value) .ToList(); QueryParser parser = new QueryParser(LuceneFields.BODY, Analyzer); BooleanQuery booleanQuery = new BooleanQuery(); // go through each term foreach (string term in searchList) { Query query = null; if (term.Contains(" ")) // multi word phrase { query = new PhraseQuery(); foreach (string str in term.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)) { ((PhraseQuery)query).Add(new Term(LuceneFields.BODY, str)); } } else query = parser.Parse(term); string strQuery = query.ToString(); if (query.ToString() != "") booleanQuery.Add(query, BooleanClause.Occur.MUST); } </code></pre> <p>I have checked the query that is being created and it looks OK to me: </p> <pre><code>+body:"The following table" </code></pre> <p>And I have also confirmed this text is actually in the Lucene index as you can see from a search result just searching for "table"</p> <p><img src="https://i.stack.imgur.com/aa3T3.gif" alt="enter image description here"></p> <p>I'm at a loss really for what could be the problem.</p> <p>I have used the following code to create the index:</p> <pre><code>Directory = FSDirectory.Open(new System.IO.DirectoryInfo(IndexDirectory)); Analyzer = new StandardAnalyzer(Version); using (IndexWriter indexWriter = new IndexWriter(Directory, Analyzer, new IndexWriter.MaxFieldLength(Int32.MaxValue))) { Response.Write("Adding document..."); Document document = new Document(); // Store the IDDataContent document.Add(new Field(LuceneFields.ID, id.ToString(), Field.Store.YES, Field.Index.ANALYZED)); // store the url to the file itself document.Add(new Field(LuceneFields.HREF, FileURL, Field.Store.YES, Field.Index.ANALYZED)); //document.Add(new Field(LuceneFields.TITLE, Article.Title, Field.Store.YES, Field.Index.ANALYZED)); // store the text of the PDF document.Add(new Field(LuceneFields.BODY, PdfContents, Field.Store.YES, Field.Index.ANALYZED)); indexWriter.AddDocument(document); indexWriter.Optimize(); indexWriter.Commit(); } </code></pre>
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USRollcredit
    1. USRollcredit
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. VO
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      1. POLucene.NET Phrase search returning no results
      1. USPrescott
      1. VTFavorite
    1. COdid you try running the phrase query using Luke?
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      1. POLucene.NET Phrase search returning no results
      1. USMikos
    2. COThe query using Luke returns the expected result
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      1. POLucene.NET Phrase search returning no results
      1. USRollcredit
 

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