Thanks, Ian:
You saved my day!
And there is a further question to ask:
Since the analyzer could only be configured through the IndexWriter,
using different
analyzers for different Fields is not possible, right? I only want
this '_id' field to identify
the document in index, so I could update or delete the specific
document from index
when needed, the real searching field is a text field, which should be
analysed by
smart_cn analyser.
Thus, I think it will good to have such an configure option as
IndexOptions.NOT_ANALYSED.
I remember to have that in the old version of lucene, but not found in
version 5.x
Any suggestion to bypass that?
Sorry for my bad English.
2017-02-17 19:40 GMT+08:00 Ian Lea <ian....@gmail.com>:
> Hi
>
>
> SimpleAnalyzer uses LetterTokenizer which divides text at non-letters.
> Your add and search methods use the analyzer but the delete method doesn't.
>
> Replacing SimpleAnalyzer with KeywordAnalyzer in your program fixes it.
> You'll need to make sure that your id field is left alone.
>
>
> Good to see a small self-contained test program. A couple of suggestions
> to make it even better if there's a next time:
>
> Use final static String ID = "_id" and ... KEY =
> "5836962b0293a47b09d345f1". Minimises the risk of typos.
>
> And use RAMDirectory. Means your program doesn't leave junk on my disk if
> I run it, and also means it starts with an empty index each time.
>
>
> --
> Ian.
>
>
> On Fri, Feb 17, 2017 at 10:04 AM, Armnotstrong <zhaoxmu...@gmail.com> wrote:
>
>> Hi, all:
>>
>> I am Using version 5.5.4, and find can't delete a document via the
>> IndexWriter.deleteDocuments(term) method.
>>
>> Here is the test code:
>>
>> import org.apache.lucene.analysis.core.SimpleAnalyzer;
>> import org.apache.lucene.document.Document;
>> import org.apache.lucene.document.Field;
>> import org.apache.lucene.document.FieldType;
>> import org.apache.lucene.index.*;
>> import org.apache.lucene.queryparser.classic.ParseException;
>> import org.apache.lucene.queryparser.classic.QueryParser;
>> import org.apache.lucene.search.IndexSearcher;
>> import org.apache.lucene.search.Query;
>> import org.apache.lucene.search.ScoreDoc;
>> import org.apache.lucene.store.Directory;
>> import org.apache.lucene.store.FSDirectory;
>>
>> import java.io.IOException;
>> import java.nio.file.Paths;
>>
>> public class TestSearch {
>> static SimpleAnalyzer analyzer = new SimpleAnalyzer();
>>
>> public static void main(String[] argvs) throws IOException,
>> ParseException {
>> generateIndex("5836962b0293a47b09d345f1");
>> query("5836962b0293a47b09d345f1");
>> delete("5836962b0293a47b09d345f1");
>> query("5836962b0293a47b09d345f1");
>>
>> }
>>
>> public static void generateIndex(String id) throws IOException {
>> Directory directory = FSDirectory.open(Paths.get("/
>> tmp/test/lucene"));
>> IndexWriterConfig config = new IndexWriterConfig(analyzer);
>> IndexWriter iwriter = new IndexWriter(directory, config);
>> FieldType fieldType = new FieldType();
>> fieldType.setStored(true);
>> fieldType.setIndexOptions(IndexOptions.DOCS_AND_FREQS_
>> AND_POSITIONS_AND_OFFSETS);
>> Field idField = new Field("_id", id, fieldType);
>> Document doc = new Document();
>> doc.add(idField);
>> iwriter.addDocument(doc);
>> iwriter.close();
>>
>> }
>>
>> public static void query(String id) throws ParseException, IOException
>> {
>> Query query = new QueryParser("_id", analyzer).parse(id);
>> Directory directory = FSDirectory.open(Paths.get("/
>> tmp/test/lucene"));
>> IndexReader ireader = DirectoryReader.open(directory);
>> IndexSearcher isearcher = new IndexSearcher(ireader);
>> ScoreDoc[] scoreDoc = isearcher.search(query, 100).scoreDocs;
>> for(ScoreDoc scdoc: scoreDoc){
>> Document doc = isearcher.doc(scdoc.doc);
>> System.out.println(doc.get("_id"));
>> }
>> }
>>
>> public static void delete(String id){
>> try {
>> Directory directory =
>> FSDirectory.open(Paths.get("/tmp/test/lucene"));
>> IndexWriterConfig config = new IndexWriterConfig(analyzer);
>> IndexWriter iwriter = new IndexWriter(directory, config);
>> Term term = new Term("_id", id);
>> iwriter.deleteDocuments(term);
>> iwriter.commit();
>> iwriter.close();
>> }catch (IOException e){
>> e.printStackTrace();
>> }
>> }
>> }
>>
>>
>> --
>> ========================================
>> best regards & a nice day
>> Zhao Ximing
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org
>> For additional commands, e-mail: java-user-h...@lucene.apache.org
>>
>>
--
========================================
best regards & a nice day
Zhao Ximing
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