Yes, You'd need to delete the document and then re-add a newly created document object. You may use the key and delete the doc using the Term(key, value).
-- Anshum Gupta http://ai-cafe.blogspot.com On Mon, Jun 6, 2011 at 4:45 PM, Pranav goyal <pranavgoyal40...@gmail.com>wrote: > Hi Anshum, > > Thanks for answering my question. By this I got to know that I cannot > update > without deleting my document. > > So whenever I am indexing the documents first I need to check whether the > particular key exists in the document or not and if it exists I need to > delete it and add the updated one? > > Sounds Cool? > > On Mon, Jun 6, 2011 at 4:10 PM, Anshum <ansh...@gmail.com> wrote: > > > Hii Pranav, > > By what you've mentioned, it looks like you want to modify a particular > > document (or all docs) by adding a particular field in the document(s). > As > > of right now, its not possible to modify a document inside a lucene > index. > > That is due to the way the index is structured. The only way as of now to > > modify a record is to delete it, create a new doc and then add the new > doc. > > Also, the lucene's delete document function does not physically free up > the > > space for the document unless you optimize the index so you may have to > do > > that periodically, depending upon your update frequency. > > Even the updateDocument function as of now would internally delete the > > document and add the new supplied document. > > Hope this answer helps. > > > > -- > > Anshum Gupta > > http://ai-cafe.blogspot.com > > > > > > On Mon, Jun 6, 2011 at 11:59 AM, Pranav goyal < > pranavgoyal40...@gmail.com > > >wrote: > > > > > Hi all, > > > > > > I am a newbie to lucene. > > > I have successfully created my lucene index. But I am not getting how > to > > > invalidate previous indexes whenever I add/delete/update any field in > my > > > lucene index. > > > Please help me out. > > > > > > for better understanding I have wrote my indexing function : > > > > > > StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_31); > > > IndexWriter writer = null; > > > File indexDir = new File("./indexDir"); > > > try { > > > writer = new > > IndexWriter(FSDirectory.open(indexDir), > > > analyzer, IndexWriter.MaxFieldLength.UNLIMITED); > > > } > > > catch (IOException e1) { > > > e1.printStackTrace(); > > > } > > > > > > > > > //Adding New fields to the document > > > Document d = new Document(); > > > d.add(new Field("key", key , Field.Store.YES , > > > Field.Index.ANALYZED)); > > > > > > > > > // d.add(Field.Text("obj", attribute.toString())); > > > // index in Lucene here > > > if (attribute instanceof String) { > > > System.out.println("IN CMnString "); > > > d.add(new > Field("attribute",attribute.toString(), > > > Field.Store.YES, Field.Index.NO)); > > > System.out.println("key is ->"+key+"...Attribute > > is > > > "+attribute); > > > } > > > else if (attribute instanceof CMnMoney) { > > > System.out.println("IN CMnMoney "); > > > d.add(new > Field("attribute",attribute.toString(), > > > Field.Store.YES, Field.Index.NO)); > > > System.out.println("key is ->"+key+"...Value is > > > "+attribute); > > > } > > > else if (attribute instanceof CMnQuantity) { > > > System.out.println("IN CMnQuantity "); > > > d.add(new > Field("attribute",attribute.toString(), > > > Field.Store.YES, Field.Index.NO)); > > > System.out.println("key is ->"+key+"...Attribute > > is > > > "+attribute); > > > } > > > else if (attribute instanceof CMnEnum) { > > > System.out.println("IN CMnEnum "); > > > d.add(new > Field("attribute",attribute.toString(), > > > Field.Store.YES, Field.Index.NO)); > > > System.out.println("key is ->"+key+"...Attribute > > is > > > "+attribute); > > > } > > > else { > > > // see what else is there.... > > > } > > > try { > > > writer.addDocument(d); > > > writer.optimize() ; > > > writer.close(); > > > } > > > catch (IOException e1) { > > > e1.printStackTrace(); > > > } > > > } > > > > > > > > > > > > Please guide me further as I got stuck at this point. > > > > > > I have searched a lot about this and all I got is I have to first > delete > > > that document and then add that document again to my index. > > > > > > > > > -- > I'm very responsible, when ever something goes wrong they always say I'm > responsible -- >
