I think you need TextField rather than StringField. See also
http://wiki.apache.org/lucene-java/LuceneFAQ#Why_am_I_getting_no_hits_.2BAC8_incorrect_hits.3F
--
Ian.
On Tue, Dec 18, 2012 at 2:14 PM, Ramon Casha <rca...@gmail.com> wrote:
> I have just downloaded and set up Lucene 4.0.0 to implement a search
> facility for a web app I'm developing.
>
> Creating the index seems to be successful - the files created contain
> the text that I'm indexing. However, search is returning no results.
> The code I'm using is fairly similar to the examples given.
>
> Here is the search code:
>
> private static final File index = new File("/tmp/naturopedia-index");
> private static final Version VERSION = Version.LUCENE_40;
>
> public String search() throws IOException, ParseException {
> Analyzer analyzer = new StandardAnalyzer(VERSION);
> Directory directory = FSDirectory.open(index);
>
> DirectoryReader ireader = DirectoryReader.open(directory);
> IndexSearcher isearcher = new IndexSearcher(ireader);
>
> QueryParser parser = new QueryParser(VERSION, "labels", analyzer);
>
> Query q = parser.parse(getQuery());
> ScoreDoc[] hits = isearcher.search(q, 1000).scoreDocs;
>
> for (int i = 0; i < hits.length; i++) {
> Document hitDoc = isearcher.doc(hits[i].doc);
> System.out.println(hitDoc.getField("id"));
> }
> ireader.close();
> directory.close();
> return "search";
> }
> ----------------------
> Every time I try this, the search returns zero results. I tried with
> different fields (text and labels), both of which are indexed, and I
> tried different words. Any help would be appreciated.
>
> Here is the code for producing the index:
>
> public String crawl() throws IOException {
> Analyzer analyzer = new StandardAnalyzer(VERSION);
> Directory directory = FSDirectory.open(index);
>
> IndexWriterConfig config = new IndexWriterConfig(VERSION, analyzer);
> config.setOpenMode(IndexWriterConfig.OpenMode.CREATE);
> IndexWriter iwriter = new IndexWriter(directory, config);
>
> DB db = new DB(); // JPA interface class.
>
> for ( Taxonomy t : db.taxonomy.all() ) {
> LOG.log(Level.INFO, "Scanning {0}", t);
>
> Document doc = new Document();
> doc.add(new LongField("id", t.getId(), Store.YES));
> LOG.log(Level.INFO, " id={0}", t.getId());
> StringBuilder text = new StringBuilder();
> for(Text l : t.getTexts()) {
> text.append(l.getWikiText())
> .append((' '));
> }
> if(text.length() > 0) {
> doc.add(new StringField("text", text.toString(),
> Field.Store.YES));
> LOG.log(Level.INFO, " text={0}", text);
> }
>
> StringBuilder labels = new StringBuilder();
> toIndex(labels, t.getLabels());
> for(Image l : t.getImages()) {
> toIndex(labels, l.getLabels());
> }
> doc.add(new StringField("labels", labels.toString(),
> Field.Store.NO));
> LOG.log(Level.INFO, " labels={0}", labels);
> StringBuilder sb = new StringBuilder();
> for ( Tag tag : t.getTags() ) {
> toIndex(sb, tag.getLabels());
> }
> if(!sb.toString().isEmpty()) {
> doc.add(new StringField("tags", sb.toString(),
> Field.Store.NO));
> LOG.log(Level.INFO, " tags={0}", sb);
> }
> iwriter.addDocument(doc);
> }
>
> db.close();
> iwriter.close();
>
> return "search";
> }
>
> private void toIndex(StringBuilder sb, LabelGroup lg) {
> for(Label l : lg.getLabels()) {
> sb.append(l.getText());
> sb.append(" ");
> }
> }
>
>
> --
> Ramon Casha
>
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