lucene search field contains space - search

Question

Here is my Lucene.Net example`
using Lucene.Net.Analysis;
using Lucene.Net.Analysis.Standard;
using Lucene.Net.Documents;
using Lucene.Net.Index;
using Lucene.Net.QueryParsers;
using Lucene.Net.Search;
using Lucene.Net.Store;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Directory = Lucene.Net.Store.Directory;
using Version = Lucene.Net.Util.Version;
namespace LuceneTest
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello Lucene.net");
var Book1 = new Document();
Book1.Add(new Field("Id", "1", Field.Store.YES, Field.Index.NOT_ANALYZED));
Book1.Add(new Field("Author", "Tom and Jerry".ToLower(), Field.Store.YES, Field.Index.ANALYZED));
Book1.Add(new Field("Series", "Science".ToLower(), Field.Store.YES, Field.Index.NOT_ANALYZED));
Book1.Add(new Field("Location", "Melbourne", Field.Store.YES, Field.Index.NOT_ANALYZED));
var Book2 = new Document();
Book2.Add(new Field("Id", "2", Field.Store.YES, Field.Index.NOT_ANALYZED));
Book2.Add(new Field("Author", "Michael Jordan".ToLower(), Field.Store.YES, Field.Index.ANALYZED));
Book2.Add(new Field("Series", "Science and Fiction".ToLower(), Field.Store.YES, Field.Index.NOT_ANALYZED));
Book2.Add(new Field("Location", "Sydeny", Field.Store.YES, Field.Index.NOT_ANALYZED));
var Book3 = new Document();
Book3.Add(new Field("Id", "3", Field.Store.YES, Field.Index.NOT_ANALYZED));
Book3.Add(new Field("Author", "David Beckham".ToLower(), Field.Store.YES, Field.Index.ANALYZED));
Book3.Add(new Field("Series", "Math Science".ToLower(), Field.Store.YES, Field.Index.NOT_ANALYZED));
Book3.Add(new Field("Location", "London", Field.Store.YES, Field.Index.NOT_ANALYZED));
var Book4 = new Document();
Book4.Add(new Field("Id", "4", Field.Store.YES, Field.Index.NOT_ANALYZED));
Book4.Add(new Field("Author", "Michael David".ToLower(), Field.Store.YES, Field.Index.ANALYZED));
Book4.Add(new Field("Series", "Computer Science".ToLower(), Field.Store.YES, Field.Index.NOT_ANALYZED));
Book4.Add(new Field("Location", "New York", Field.Store.YES, Field.Index.NOT_ANALYZED));
var Book5 = new Document();
Book5.Add(new Field("Id", "5", Field.Store.YES, Field.Index.NOT_ANALYZED));
Book5.Add(new Field("Author", "Kobe Bryant".ToLower(), Field.Store.YES, Field.Index.ANALYZED));
Book5.Add(new Field("Series", "Computer".ToLower(), Field.Store.YES, Field.Index.NOT_ANALYZED));
Book5.Add(new Field("Location", "Los Angeles", Field.Store.YES, Field.Index.NOT_ANALYZED));
Directory directory = FSDirectory.Open(new DirectoryInfo(Environment.CurrentDirectory + "\\LuceneIndex"));
Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_30);
Analyzer analyzer2 = new KeywordAnalyzer();
var writer = new IndexWriter(directory, analyzer, true, IndexWriter.MaxFieldLength.LIMITED);
writer.AddDocument(Book1);
writer.AddDocument(Book2);
writer.AddDocument(Book3);
writer.AddDocument(Book4);
writer.AddDocument(Book5);
writer.Optimize();
writer.Dispose();
IndexReader indexReader = IndexReader.Open(directory, true);
Searcher seacher = new IndexSearcher(indexReader);
var queryParser = new QueryParser(Version.LUCENE_30, "Series", analyzer);
var query = queryParser.Parse("\"Computer Science\"");
Console.WriteLine("Searching For " + query);
TopDocs resultDocs = seacher.Search(query, indexReader.MaxDoc);
var hits = resultDocs.ScoreDocs;
foreach (var hit in hits)
{
var documentFromSearch = seacher.Doc(hit.Doc);
Console.WriteLine(documentFromSearch.Get("Id") + ", " + documentFromSearch.Get("Author") + ", " + documentFromSearch.Get("Location") + ", " + documentFromSearch.Get("Series"));
}
if (hits.Count() == 0)
Console.WriteLine("No result.");
Console.ReadKey();
}
}
}
Line 78,var query = queryParser.Parse("\"Computer Science\"");`
If I make the parameter "Computer Science", it will the book that series is "computer" or is "science".(record 1 and 5) What I want here is actually the record which has the series "Computer Science" (Book4). What should I change?
Thank you in advance

Answer 1

The common way of handling this issue is to use a phrase query in Lucene -- for example, in query syntax you could use "Computer Science" book4 to look for "book4" in Computer Science.