From 756585089fb09cd0e25856b55510e69a52112e5f Mon Sep 17 00:00:00 2001 From: Marcin Koziej Date: Thu, 10 Nov 2011 16:57:56 +0100 Subject: [PATCH] search demo --- .gitignore | 2 + apps/search/index.py | 164 ++++++++++++++----- apps/search/views.py | 47 +++++- requirements.txt | 3 + wolnelektury/templates/newsearch/search.html | 19 ++- 5 files changed, 180 insertions(+), 55 deletions(-) diff --git a/.gitignore b/.gitignore index c37544128..230a87670 100644 --- a/.gitignore +++ b/.gitignore @@ -33,3 +33,5 @@ thumbs.db # Tags file TAGS + +media diff --git a/apps/search/index.py b/apps/search/index.py index 7ec88c619..af3dd9a60 100644 --- a/apps/search/index.py +++ b/apps/search/index.py @@ -3,14 +3,15 @@ from django.conf import settings from lucene import SimpleFSDirectory, IndexWriter, File, Field, \ NumericField, Version, Document, JavaError, IndexSearcher, \ - QueryParser, Term, PerFieldAnalyzerWrapper, \ + QueryParser, PerFieldAnalyzerWrapper, \ SimpleAnalyzer, PolishAnalyzer, ArrayList, \ KeywordAnalyzer, NumericRangeQuery, BooleanQuery, \ BlockJoinQuery, BlockJoinCollector, TermsFilter, \ HashSet, BooleanClause, Term, CharTermAttribute, \ - PhraseQuery, StringReader, TermQuery, BlockJoinQuery, \ - Sort, Integer, \ - initVM, CLASSPATH + PhraseQuery, MultiPhraseQuery, StringReader, TermQuery, BlockJoinQuery, \ + FuzzyQuery, FuzzyTermEnum, Sort, Integer, \ + SimpleHTMLFormatter, Highlighter, QueryScorer, TokenSources, TextFragment, \ + initVM, CLASSPATH, JArray # KeywordAnalyzer JVM = initVM(CLASSPATH) import sys @@ -24,6 +25,7 @@ from threading import current_thread import atexit import traceback + class WLAnalyzer(PerFieldAnalyzerWrapper): def __init__(self): polish = PolishAnalyzer(Version.LUCENE_34) @@ -43,7 +45,9 @@ class WLAnalyzer(PerFieldAnalyzerWrapper): self.addAnalyzer("author", simple) self.addAnalyzer("is_book", keyword) - #self.addanalyzer("fragment_anchor", keyword) + self.addAnalyzer("KEYWORD", keyword) + self.addAnalyzer("SIMPLE", simple) + self.addAnalyzer("NATURAL", polish) class IndexStore(object): @@ -81,7 +85,7 @@ class Index(IndexStore): self.index = None def remove_book(self, book): - q = NumericRangeQuery.newIntRange("book_id", book.id, book.id, True,True) + q = NumericRangeQuery.newIntRange("book_id", book.id, book.id, True, True) self.index.deleteDocuments(q) def index_book(self, book, overwrite=True): @@ -122,10 +126,10 @@ class Index(IndexStore): book_info = dcparser.parse(book.xml_file) print("extract metadata for book %s id=%d, thread%d" % (book.slug, book.id, current_thread().ident)) - + doc = self.create_book_doc(book) doc.add(Field("slug", book.slug, Field.Store.NO, Field.Index.ANALYZED_NO_NORMS)) - #doc.add(Field("tags", ','.join([t.name for t in book.tags]), Field.Store.NO, Field.Index.ANALYZED)) + doc.add(Field("tags", ','.join([t.name for t in book.tags]), Field.Store.NO, Field.Index.ANALYZED)) doc.add(Field("is_book", 'true', Field.Store.NO, Field.Index.NOT_ANALYZED)) # validator, name @@ -160,7 +164,6 @@ class Index(IndexStore): if master.tag in self.master_tags: return master - def extract_content(self, book): wld = WLDocument.from_file(book.xml_file.path) root = wld.edoc.getroot() @@ -172,7 +175,7 @@ class Index(IndexStore): master = self.get_master(root) if master is None: return [] - + header_docs = [] for header, position in zip(list(master), range(len(master))): if header.tag in self.skip_header_tags: @@ -224,7 +227,7 @@ class Index(IndexStore): Field.Store.YES, Field.Index.NOT_ANALYZED)) doc.add(Field("content", u' '.join(filter(lambda s: s is not None, frag['content'])), - Field.Store.YES, Field.Index.ANALYZED)) + Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS)) doc.add(Field("themes", u' '.join(filter(lambda s: s is not None, frag['themes'])), Field.Store.NO, Field.Index.ANALYZED)) @@ -249,12 +252,12 @@ class Index(IndexStore): def log_exception_wrapper(f): def _wrap(*a): - try: - f(*a) - except Exception, e: - print("Error in indexing thread: %s" % e) - traceback.print_exc() - raise e + try: + f(*a) + except Exception, e: + print("Error in indexing thread: %s" % e) + traceback.print_exc() + raise e return _wrap @@ -307,7 +310,7 @@ class ReusableIndex(Index): class Search(IndexStore): def __init__(self, default_field="content"): IndexStore.__init__(self) - self.analyzer = PolishAnalyzer(Version.LUCENE_34) + self.analyzer = WLAnalyzer() #PolishAnalyzer(Version.LUCENE_34) ## self.analyzer = WLAnalyzer() self.searcher = IndexSearcher(self.store, True) self.parser = QueryParser(Version.LUCENE_34, default_field, @@ -387,7 +390,7 @@ class Search(IndexStore): class SearchResult(object): - def __init__(self, searcher, scoreDocs, score=None): + def __init__(self, searcher, scoreDocs, score=None, highlight_query=None): if score: self.score = score else: @@ -411,6 +414,12 @@ class SearchResult(object): self.sections.append(sec) self.scores[sec] = scoreDocs.score + self.snippets = [] + + def add_snippets(self, snippets): + self.snippets += snippets + return self + def get_book(self): return catalogue.models.Book.objects.get(id=self.book_id) @@ -432,6 +441,7 @@ class SearchResult(object): raise ValueError("this search result is or book %d; tried to merge with %d" % (self.book_id, other.book_id)) self.fragments += other.fragments self.sections += other.sections + self.snippets += other.snippets self.scores.update(other.scores) if other.score > self.score: self.score = other.score @@ -458,38 +468,75 @@ class SearchResult(object): class MultiSearch(Search): """Class capable of IMDb-like searching""" - def get_tokens(self, queryreader): - if isinstance(queryreader, str) or isinstance(queryreader, unicode): - queryreader = StringReader(queryreader) - queryreader.reset() - tokens = self.analyzer.reusableTokenStream('content', queryreader) + def get_tokens(self, searched, field='content'): + """returns tokens analyzed by a proper (for a field) analyzer + argument can be: StringReader, string/unicode, or tokens. In the last case + they will just be returned (so we can reuse tokens, if we don't change the analyzer) + """ + if isinstance(searched, str) or isinstance(searched, unicode): + searched = StringReader(searched) + elif isinstance(searched, list): + return searched + + searched.reset() + tokens = self.analyzer.reusableTokenStream(field, searched) toks = [] while tokens.incrementToken(): cta = tokens.getAttribute(CharTermAttribute.class_) toks.append(cta.toString()) return toks - def make_phrase(self, tokens, field='content', slop=2): - phrase = PhraseQuery() - phrase.setSlop(slop) - for t in tokens: - term = Term(field, t) - phrase.add(term) + def fuzziness(self, fuzzy): + if not fuzzy: + return None + if isinstance(fuzzy, float) and fuzzy > 0.0 and fuzzy <= 1.0: + return fuzzy + else: + return 0.5 + + def make_phrase(self, tokens, field='content', slop=2, fuzzy=False): + if fuzzy: + phrase = MultiPhraseQuery() + for t in tokens: + term = Term(field, t) + fuzzterm = FuzzyTermEnum(self.searcher.getIndexReader(), term, self.fuzziness(fuzzy)) + fuzzterms = [] + + while True: + # print("fuzz %s" % unicode(fuzzterm.term()).encode('utf-8')) + ft = fuzzterm.term() + if ft: + fuzzterms.append(ft) + if not fuzzterm.next(): break + if fuzzterms: + phrase.add(JArray('object')(fuzzterms, Term)) + else: + phrase.add(term) + else: + phrase = PhraseQuery() + phrase.setSlop(slop) + for t in tokens: + term = Term(field, t) + phrase.add(term) return phrase - def make_term_query(self, tokens, field='content', modal=BooleanClause.Occur.SHOULD): + def make_term_query(self, tokens, field='content', modal=BooleanClause.Occur.SHOULD, fuzzy=False): q = BooleanQuery() for t in tokens: term = Term(field, t) - q.add(BooleanClause(TermQuery(term), modal)) + if fuzzy: + term = FuzzyQuery(term, self.fuzziness(fuzzy)) + else: + term = TermQuery(term) + q.add(BooleanClause(term, modal)) return q def content_query(self, query): return BlockJoinQuery(query, self.parent_filter, BlockJoinQuery.ScoreMode.Total) - def search_perfect_book(self, tokens, max_results=20): - qrys = [self.make_phrase(tokens, field=fld) for fld in ['author', 'title']] + def search_perfect_book(self, searched, max_results=20, fuzzy=False): + qrys = [self.make_phrase(self.get_tokens(searched, field=fld), field=fld, fuzzy=fuzzy) for fld in ['author', 'title']] books = [] for q in qrys: @@ -498,38 +545,52 @@ class MultiSearch(Search): books.append(SearchResult(self.searcher, found)) return books - def search_perfect_parts(self, tokens, max_results=20): - qrys = [self.make_phrase(tokens, field=fld) for fld in ['content']] + def search_perfect_parts(self, searched, max_results=20, fuzzy=False): + qrys = [self.make_phrase(self.get_tokens(searched), field=fld, fuzzy=fuzzy) for fld in ['content']] books = [] for q in qrys: top = self.searcher.search(q, max_results) for found in top.scoreDocs: - books.append(SearchResult(self.searcher, found)) + books.append(SearchResult(self.searcher, found).add_snippets(self.get_snippets(found, q))) return books - def search_everywhere(self, tokens, max_results=20): + def search_everywhere(self, searched, max_results=20, fuzzy=False): + books = [] + + # content only query : themes x content + q = BooleanQuery() + + tokens = self.get_tokens(searched) + q.add(BooleanClause(self.make_term_query(tokens, field='themes', fuzzy=fuzzy), BooleanClause.Occur.MUST)) + q.add(BooleanClause(self.make_term_query(tokens, field='content', fuzzy=fuzzy), BooleanClause.Occur.SHOULD)) + + topDocs = self.searcher.search(q, max_results) + for found in topDocs.scoreDocs: + books.append(SearchResult(self.searcher, found)) + + # joined query themes/content x author/title/epochs/genres/kinds q = BooleanQuery() in_meta = BooleanQuery() in_content = BooleanQuery() for fld in ['themes', 'content']: - in_content.add(BooleanClause(self.make_term_query(tokens, field=fld), BooleanClause.Occur.SHOULD)) + in_content.add(BooleanClause(self.make_term_query(tokens, field=fld, fuzzy=False), BooleanClause.Occur.SHOULD)) + + in_meta.add(BooleanClause(self.make_term_query(self.get_tokens(searched, field='author'), field='author', fuzzy=fuzzy), BooleanClause.Occur.SHOULD)) - for fld in ['author', 'title', 'epochs', 'genres', 'kinds']: - in_meta.add(BooleanClause(self.make_term_query(tokens, field=fld), BooleanClause.Occur.SHOULD)) + for fld in ['title', 'epochs', 'genres', 'kinds']: + in_meta.add(BooleanClause(self.make_term_query(tokens, field=fld, fuzzy=fuzzy), BooleanClause.Occur.SHOULD)) q.add(BooleanClause(in_meta, BooleanClause.Occur.MUST)) in_content_join = self.content_query(in_content) q.add(BooleanClause(in_content_join, BooleanClause.Occur.MUST)) - + # import pdb; pdb.set_trace() collector = BlockJoinCollector(Sort.RELEVANCE, 100, True, True) self.searcher.search(q, collector) - books = [] - top_groups = collector.getTopGroups(in_content_join, Sort.RELEVANCE, 0, max_results, 0, True) if top_groups: for grp in top_groups.groups: @@ -579,7 +640,7 @@ class MultiSearch(Search): return None - + def do_search(self, query, max_results=50, collector=None): tops = self.searcher.search(query, max_results) #tops = self.searcher.search(p_content, max_results) @@ -591,3 +652,16 @@ class MultiSearch(Search): bks.append(b) print "%s (%d) -> %f" % (b, b.id, found.score) return (bks, tops.totalHits) + + def get_snippets(self, scoreDoc, query, field='content'): + htmlFormatter = SimpleHTMLFormatter() + highlighter = Highlighter(htmlFormatter, QueryScorer(query)) + + stored = self.searcher.doc(scoreDoc.doc) + text = stored.get(field) + tokenStream = TokenSources.getAnyTokenStream(self.searcher.getIndexReader(), scoreDoc.doc, field, self.analyzer) + # highlighter.getBestTextFragments(tokenStream, text, False, 10) + snip = highlighter.getBestFragments(tokenStream, text, 3, "...") + print('snips: %s' % snip) + + return [snip] diff --git a/apps/search/views.py b/apps/search/views.py index fc14b067d..d9b2f26d5 100644 --- a/apps/search/views.py +++ b/apps/search/views.py @@ -1,5 +1,4 @@ - from django.shortcuts import render_to_response, get_object_or_404 from django.template import RequestContext from django.contrib.auth.decorators import login_required @@ -9,6 +8,31 @@ from catalogue.utils import get_random_hash from catalogue.models import Book, Tag from catalogue import forms from search import MultiSearch, JVM, SearchResult +from lucene import StringReader + +import enchant + +dictionary = enchant.Dict('pl_PL') + + +def did_you_mean(query, tokens): + change = {} + + for t in tokens: + print("%s ok? %s, sug: %s" %(t, dictionary.check(t), dictionary.suggest(t))) + if not dictionary.check(t): + try: + change[t] = dictionary.suggest(t)[0] + except IndexError: + pass + + if change == {}: + return None + + for frm, to in change.items(): + query = query.replace(frm, to) + + return query def main(request): @@ -17,15 +41,26 @@ def main(request): srch = MultiSearch() results = None + query = None + fuzzy = False if 'q' in request.GET: - toks = srch.get_tokens(request.GET['q']) - results = SearchResult.aggregate(srch.search_perfect_book(toks), - srch.search_perfect_parts(toks), - srch.search_everywhere(toks)) + query = request.GET['q'] + toks = StringReader(query) + fuzzy = 'fuzzy' in request.GET + if fuzzy: + fuzzy = 0.7 + + + results = SearchResult.aggregate(srch.search_perfect_book(toks, fuzzy=fuzzy), + srch.search_perfect_parts(toks, fuzzy=fuzzy), + srch.search_everywhere(toks, fuzzy=fuzzy)) results.sort(reverse=True) for r in results: print r.parts - return render_to_response('newsearch/search.html', {"results": results}, + return render_to_response('newsearch/search.html', {'results': results, + 'did_you_mean': (query is not None) and + did_you_mean(query, srch.get_tokens(query, field='SIMPLE')), + 'fuzzy': fuzzy}, context_instance=RequestContext(request)) diff --git a/requirements.txt b/requirements.txt index 4fd263ef3..dfb01f19d 100644 --- a/requirements.txt +++ b/requirements.txt @@ -28,3 +28,6 @@ lxml>=2.2.2 # celery tasks django-celery django-kombu + +# spell checking +pyenchant diff --git a/wolnelektury/templates/newsearch/search.html b/wolnelektury/templates/newsearch/search.html index 4dfc8581f..af36b5988 100644 --- a/wolnelektury/templates/newsearch/search.html +++ b/wolnelektury/templates/newsearch/search.html @@ -12,25 +12,36 @@

Search

- + +
+ fuzzy.

+ {% if did_you_mean %} + Czy miałeś na mysli {{did_you_mean}}? + {% endif %} +
    {% for result in results %}
  1. -

    {{result.book.pretty_title}} (id: {{result.book.id}}, score: {{result.score}})

    +

    {{result.book.pretty_title}} (id: {{result.book.id}}, score: {{result.score}})

      + {% for snippet in result.snippets %} +
    • {{snippet|safe}}
      • + {% endfor %} + {% for part in result.parts %} {% if part.header %}
    • W {{part.header}} nr {{part.position}}
      • {% else %} {% if part.fragment %}
    • -
      {% for tag in part.fragment.tags %}{{tag.name}} {% endfor %}
      - {{part.fragment.text|safe}}
      • +
      Tagi/Motywy: {% for tag in part.fragment.tags %}{{tag.name}} {% endfor %}
      + {{part.fragment.short_html|safe}} + {% endif %} {% endif %} {% endfor %} -- 2.20.1