X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/ec93d5082ab137ec690f310eb6eba3c54d10b825..53d1af7d218c1b0e07165a029d6002338933eb36:/apps/search/index.py?ds=sidebyside diff --git a/apps/search/index.py b/apps/search/index.py index 25c16a96a..f4da66f10 100644 --- a/apps/search/index.py +++ b/apps/search/index.py @@ -6,10 +6,10 @@ from lucene import SimpleFSDirectory, IndexWriter, CheckIndex, \ NumericField, Version, Document, JavaError, IndexSearcher, \ QueryParser, PerFieldAnalyzerWrapper, \ SimpleAnalyzer, PolishAnalyzer, ArrayList, \ - KeywordAnalyzer, NumericRangeQuery, BooleanQuery, \ - BlockJoinQuery, BlockJoinCollector, TermsFilter, \ + KeywordAnalyzer, NumericRangeQuery, NumericRangeFilter, BooleanQuery, \ + BlockJoinQuery, BlockJoinCollector, Filter, TermsFilter, ChainedFilter, \ HashSet, BooleanClause, Term, CharTermAttribute, \ - PhraseQuery, MultiPhraseQuery, StringReader, TermQuery, BlockJoinQuery, \ + PhraseQuery, MultiPhraseQuery, StringReader, TermQuery, \ FuzzyQuery, FuzzyTermEnum, PrefixTermEnum, Sort, Integer, \ SimpleHTMLFormatter, Highlighter, QueryScorer, TokenSources, TextFragment, \ BooleanFilter, TermsFilter, FilterClause, QueryWrapperFilter, \ @@ -25,7 +25,7 @@ import re import errno from librarian import dcparser from librarian.parser import WLDocument -from catalogue import models +import catalogue.models from multiprocessing.pool import ThreadPool from threading import current_thread import atexit @@ -35,11 +35,9 @@ import traceback class WLAnalyzer(PerFieldAnalyzerWrapper): def __init__(self): polish = PolishAnalyzer(Version.LUCENE_34) - polish_gap = PolishAnalyzer(Version.LUCENE_34) # polish_gap.setPositionIncrementGap(999) simple = SimpleAnalyzer(Version.LUCENE_34) - simple_gap = SimpleAnalyzer(Version.LUCENE_34) # simple_gap.setPositionIncrementGap(999) keyword = KeywordAnalyzer(Version.LUCENE_34) @@ -48,21 +46,24 @@ class WLAnalyzer(PerFieldAnalyzerWrapper): PerFieldAnalyzerWrapper.__init__(self, polish) - self.addAnalyzer("tags", simple_gap) + self.addAnalyzer("tags", simple) self.addAnalyzer("technical_editors", simple) self.addAnalyzer("editors", simple) self.addAnalyzer("url", keyword) self.addAnalyzer("source_url", keyword) self.addAnalyzer("source_name", simple) self.addAnalyzer("publisher", simple) - self.addAnalyzer("author", simple) + self.addAnalyzer("authors", simple) self.addAnalyzer("is_book", keyword) + # shouldn't the title have two forms? _pl and simple? - self.addAnalyzer("themes", simple_gap) - self.addAnalyzer("themes_pl", polish_gap) + self.addAnalyzer("themes", simple) + self.addAnalyzer("themes_pl", polish) - self.addAnalyzer("tag_name", simple_gap) - self.addAnalyzer("tag_name_pl", polish_gap) + self.addAnalyzer("tag_name", simple) + self.addAnalyzer("tag_name_pl", polish) + + self.addAnalyzer("translators", simple) self.addAnalyzer("KEYWORD", keyword) self.addAnalyzer("SIMPLE", simple) @@ -114,15 +115,17 @@ class Snippets(object): return self def add(self, snippet): - l = len(snippet) - self.file.write(snippet.encode('utf-8')) + txt = snippet.encode('utf-8') + l = len(txt) + self.file.write(txt) pos = (self.position, l) self.position += l return pos def get(self, pos): self.file.seek(pos[0], 0) - return self.read(pos[1]).decode('utf-8') + txt = self.file.read(pos[1]).decode('utf-8') + return txt def close(self): self.file.close() @@ -159,7 +162,7 @@ class Index(IndexStore): q = NumericRangeQuery.newIntRange("tag_id", 0, Integer.MAX_VALUE, True, True) self.index.deleteDocuments(q) - for tag in models.Tag.objects.all(): + for tag in catalogue.models.Tag.objects.all(): doc = Document() doc.add(NumericField("tag_id", Field.Store.YES, True).setIntValue(tag.id)) doc.add(Field("tag_name", tag.name, Field.Store.NO, Field.Index.ANALYZED)) @@ -171,23 +174,23 @@ class Index(IndexStore): q = NumericRangeQuery.newIntRange("book_id", book.id, book.id, True, True) self.index.deleteDocuments(q) - def index_book(self, book, overwrite=True): + def index_book(self, book, book_info=None, overwrite=True): if overwrite: self.remove_book(book) book_doc = self.create_book_doc(book) - meta_fields = self.extract_metadata(book) + meta_fields = self.extract_metadata(book, book_info) for f in meta_fields.values(): - if isinstance(f, list): + if isinstance(f, list) or isinstance(f, tuple): for elem in f: book_doc.add(elem) else: book_doc.add(f) - + self.index.addDocument(book_doc) del book_doc - self.index_content(book, book_fields=[meta_fields['title'], meta_fields['author']]) + self.index_content(book, book_fields=[meta_fields['title'], meta_fields['authors']]) master_tags = [ 'opowiadanie', @@ -210,14 +213,14 @@ class Index(IndexStore): doc.add(NumericField("parent_id", Field.Store.YES, True).setIntValue(book.parent.id)) return doc - def extract_metadata(self, book): + def extract_metadata(self, book, book_info=None): fields = {} - book_info = dcparser.parse(book.xml_file) - print("extract metadata for book %s id=%d, thread%d" % (book.slug, book.id, current_thread().ident)) + if book_info is None: + book_info = dcparser.parse(open(book.xml_file.path)) fields['slug'] = Field("slug", book.slug, Field.Store.NO, Field.Index.ANALYZED_NO_NORMS) - fields['tags'] = [Field("tags", t.name, Field.Store.NO, Field.Index.ANALYZED) for t in book.tags] + fields['tags'] = self.add_gaps([Field("tags", t.name, Field.Store.NO, Field.Index.ANALYZED) for t in book.tags], 'tags') fields['is_book'] = Field("is_book", 'true', Field.Store.NO, Field.Index.NOT_ANALYZED) # validator, name @@ -246,6 +249,7 @@ class Index(IndexStore): dt = getattr(book_info, field.name) fields[field.name] = Field(field.name, "%04d%02d%02d" %\ (dt.year, dt.month, dt.day), Field.Store.NO, Field.Index.NOT_ANALYZED) + return fields def get_master(self, root): @@ -253,8 +257,14 @@ class Index(IndexStore): if master.tag in self.master_tags: return master + def add_gaps(self, fields, fieldname): + def gap(): + while True: + yield Field(fieldname, ' ', Field.Store.NO, Field.Index.NOT_ANALYZED) + return reduce(lambda a, b: a + b, zip(fields, gap()))[0:-1] + def index_content(self, book, book_fields=[]): - wld = WLDocument.from_file(book.xml_file.path) + wld = WLDocument.from_file(book.xml_file.path, parse_dublincore=False) root = wld.edoc.getroot() master = self.get_master(root) @@ -285,21 +295,37 @@ class Index(IndexStore): doc.add(Field('content', fields["content"], Field.Store.NO, Field.Index.ANALYZED, \ Field.TermVector.WITH_POSITIONS_OFFSETS)) - snip_pos = snippets.add(content) + snip_pos = snippets.add(fields["content"]) doc.add(NumericField("snippets_position", Field.Store.YES, True).setIntValue(snip_pos[0])) doc.add(NumericField("snippets_length", Field.Store.YES, True).setIntValue(snip_pos[1])) if 'fragment_anchor' in fields: doc.add(Field("fragment_anchor", fields['fragment_anchor'], Field.Store.YES, Field.Index.NOT_ANALYZED)) - + if 'themes' in fields: - for theme in fields['themes']: - doc.add(Field("themes", theme, Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS)) - doc.add(Field("themes_pl", theme, Field.Store.NO, Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS)) + themes, themes_pl = zip(*[ + (Field("themes", theme, Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS), + Field("themes_pl", theme, Field.Store.NO, Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS)) + for theme in fields['themes']]) + + themes = self.add_gaps(themes, 'themes') + themes_pl = self.add_gaps(themes_pl, 'themes_pl') + + for t in themes: + doc.add(t) + for t in themes_pl: + doc.add(t) return doc + def give_me_utf8(s): + if isinstance(s, unicode): + return s.encode('utf-8') + else: + return s + + fragments = {} snippets = Snippets(book.id).open('w') try: @@ -315,20 +341,23 @@ class Index(IndexStore): self.index.addDocument(doc) - for start, end in walker(master): + for start, end in walker(header): if start is not None and start.tag == 'begin': fid = start.attrib['id'][1:] fragments[fid] = {'content': [], 'themes': [], 'start_section': position, 'start_header': header.tag} fragments[fid]['content'].append(start.tail) elif start is not None and start.tag == 'motyw': fid = start.attrib['id'][1:] - fragments[fid]['themes'].append(start.text) + if start.text is not None: + fragments[fid]['themes'] += map(str.strip, map(give_me_utf8, start.text.split(','))) fragments[fid]['content'].append(start.tail) elif start is not None and start.tag == 'end': fid = start.attrib['id'][1:] if fid not in fragments: continue # a broken node, skip it frag = fragments[fid] + if frag['themes'] == []: + continue # empty themes list. del fragments[fid] def jstr(l): @@ -466,9 +495,10 @@ class Search(IndexStore): bks = [] for found in tops.scoreDocs: doc = self.searcher.doc(found.doc) - bks.append(models.Book.objects.get(id=doc.get("book_id"))) + bks.append(catalogue.models.Book.objects.get(id=doc.get("book_id"))) return (bks, tops.totalHits) + def search(self, query, max_results=50): query = self.query(query) query = self.wrapjoins(query, ["content", "themes"]) @@ -477,7 +507,7 @@ class Search(IndexStore): bks = [] for found in tops.scoreDocs: doc = self.searcher.doc(found.doc) - bks.append(models.Book.objects.get(id=doc.get("book_id"))) + bks.append(catalogue.models.Book.objects.get(id=doc.get("book_id"))) return (bks, tops.totalHits) def bsearch(self, query, max_results=50): @@ -488,7 +518,7 @@ class Search(IndexStore): bks = [] for found in tops.scoreDocs: doc = self.searcher.doc(found.doc) - bks.append(models.Book.objects.get(id=doc.get("book_id"))) + bks.append(catalogue.models.Book.objects.get(id=doc.get("book_id"))) return (bks, tops.totalHits) # TokenStream tokenStream = analyzer.tokenStream(fieldName, reader); @@ -503,7 +533,9 @@ class Search(IndexStore): class SearchResult(object): - def __init__(self, searcher, scoreDocs, score=None, how_found=None, snippets_cb=None): + def __init__(self, searcher, scoreDocs, score=None, how_found=None, snippets=None): + self.snippets = [] + if score: self.score = score else: @@ -515,15 +547,16 @@ class SearchResult(object): self.book_id = int(stored.get("book_id")) header_type = stored.get("header_type") + if not header_type: + return + sec = (header_type, int(stored.get("header_index"))) header_span = stored.get('header_span') header_span = header_span is not None and int(header_span) or 1 - stored = searcher.doc(scoreDocs.doc) - self.book_id = int(stored.get("book_id")) fragment = stored.get("fragment_anchor") - hit = (sec + (header_span,), fragment, scoreDocs.score, {'how_found': how_found, 'snippets_cb': snippets_cb}) + hit = (sec + (header_span,), fragment, scoreDocs.score, {'how_found': how_found, 'snippets': snippets}) self.hits.append(hit) @@ -535,37 +568,41 @@ class SearchResult(object): self.score = other.score return self - def add_snippets(self, snippets): - self.snippets += snippets - return self - def get_book(self): - return models.Book.objects.get(id=self.book_id) + return catalogue.models.Book.objects.get(id=self.book_id) book = property(get_book) - def get_parts(self): - book = self.book + def process_hits(self): + frags = filter(lambda r: r[1] is not None, self.hits) + sect = filter(lambda r: r[1] is None, self.hits) + sect = filter(lambda s: 0 == len(filter( + lambda f: s[0][1] >= f[0][1] and s[0][1] < f[0][1] + f[0][2], + frags)), sect) + + hits = [] - def sections_covered(results): - frags = filter(lambda r: r[1] is not None, results) - sect = filter(lambda r: r[1] is None, results) - sect = filter(lambda s: 0 == len(filter( - lambda f: s[0][1] >= f[0][1] and s[0][1] < f[0][1] + f[0][2], - frags)), sect) - print "filtered, non overlapped sections: %s" % sect - return frags + sect - - - parts = [{"header": s[0], "position": s[1], '_score_key': s} for s in self.sections] \ - + [{"fragment": book.fragments.get(anchor=f), '_score_key':f} for f in self.fragments] + for s in sect: + m = {'score': s[2], + 'header_index': s[0][1] + } + m.update(s[3]) + hits.append(m) - parts.sort(lambda a, b: cmp(self.scores[a['_score_key']], self.scores[b['_score_key']])) - print("bookid: %d parts: %s" % (self.book_id, parts)) - return parts + for f in frags: + frag = catalogue.models.Fragment.objects.get(anchor=f[1]) + m = {'score': f[2], + 'fragment': frag, + 'themes': frag.tags.filter(category='theme') + } + m.update(f[3]) + hits.append(m) - parts = property(get_parts) + hits.sort(lambda a, b: cmp(a['score'], b['score']), reverse=True) + print("--- %s" % hits) + + return hits def __unicode__(self): return u'SearchResult(book_id=%d, score=%d)' % (self.book_id, self.score) @@ -586,6 +623,75 @@ class SearchResult(object): return cmp(self.score, other.score) +class Hint(object): + def __init__(self, search): + self.search = search + self.book_tags = {} + self.part_tags = [] + self._books = [] + + def books(self, *books): + self._books = books + + def tags(self, tags): + for t in tags: + if t.category in ['author', 'title', 'epoch', 'genre', 'kind']: + lst = self.book_tags.get(t.category, []) + lst.append(t) + self.book_tags[t.category] = lst + if t.category in ['theme']: + self.part_tags.append(t) + + def tag_filter(self, tags, field='tags'): + q = BooleanQuery() + + for tag in tags: + toks = self.search.get_tokens(tag.name, field=field) + tag_phrase = PhraseQuery() + for tok in toks: + tag_phrase.add(Term(field, tok)) + q.add(BooleanClause(tag_phrase, BooleanClause.Occur.MUST)) + + return QueryWrapperFilter(q) + + def book_filter(self): + tags = reduce(lambda a, b: a + b, self.book_tags.values(), []) + if tags: + return self.tag_filter(tags) + else: + return None + + def part_filter(self): + fs = [] + if self.part_tags: + fs.append(self.tag_filter(self.part_tags, field='themes')) + + if self._books != []: + bf = BooleanFilter() + for b in self._books: + id_filter = NumericRangeFilter.newIntRange('book_id', b.id, b.id, True, True) + bf.add(FilterClause(id_filter, BooleanClause.Occur.SHOULD)) + fs.append(bf) + + return MultiSearch.chain_filters(fs) + + def should_search_for_book(self): + return self._books == [] + + def just_search_in(self, all): + """Holds logic to figure out which indexes should be search, when we have some hinst already""" + some = [] + for field in all: + if field == 'authors' and 'author' in self.book_tags: + continue + if field == 'title' and self._books != []: + continue + if (field == 'themes' or field == 'themes_pl') and self.part_tags: + continue + some.append(field) + return some + + class MultiSearch(Search): """Class capable of IMDb-like searching""" def get_tokens(self, searched, field='content'): @@ -651,72 +757,83 @@ class MultiSearch(Search): q.add(BooleanClause(term, modal)) return q - def content_query(self, query): - return BlockJoinQuery(query, self.parent_filter, - BlockJoinQuery.ScoreMode.Total) + # def content_query(self, query): + # return BlockJoinQuery(query, self.parent_filter, + # BlockJoinQuery.ScoreMode.Total) - 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']] + def search_perfect_book(self, searched, max_results=20, fuzzy=False, hint=None): + fields_to_search = ['authors', 'title'] + only_in = None + if hint: + if not hint.should_search_for_book(): + return [] + fields_to_search = hint.just_search_in(fields_to_search) + only_in = hint.book_filter() + + qrys = [self.make_phrase(self.get_tokens(searched, field=fld), field=fld, fuzzy=fuzzy) for fld in fields_to_search] books = [] for q in qrys: - top = self.searcher.search(q, max_results) + top = self.searcher.search(q, + self.chain_filters([only_in, self.term_filter(Term('is_book', 'true'))]), + max_results) for found in top.scoreDocs: books.append(SearchResult(self.searcher, found)) return books - def search_perfect_parts(self, searched, max_results=20, fuzzy=False): + def search_perfect_parts(self, searched, max_results=20, fuzzy=False, hint=None): qrys = [self.make_phrase(self.get_tokens(searched), field=fld, fuzzy=fuzzy) for fld in ['content']] + flt = None + if hint: + flt = hint.part_filter() + books = [] for q in qrys: - top = self.searcher.search(q, max_results) + top = self.searcher.search(q, + self.chain_filters([self.term_filter(Term('is_book', 'true'), inverse=True), + flt + ]), + max_results) for found in top.scoreDocs: - books.append(SearchResult(self.searcher, found).add_snippets(self.get_snippets(found, q))) + books.append(SearchResult(self.searcher, found, snippets=self.get_snippets(found, q))) return books - def search_everywhere(self, searched, max_results=20, fuzzy=False): + def search_everywhere(self, searched, max_results=20, fuzzy=False, hint=None): books = [] + only_in = None + + if hint: + only_in = hint.part_filter() # 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)) + if hint is None or hint.just_search_in(['themes_pl']) != []: + q.add(BooleanClause(self.make_term_query(tokens, field='themes_pl', + 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) + topDocs = self.searcher.search(q, only_in, 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, 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 ['title', 'epochs', 'genres', 'kinds']: - # in_meta.add(BooleanClause(self.make_term_query(tokens, field=fld, fuzzy=fuzzy), BooleanClause.Occur.SHOULD)) + # query themes/content x author/title/tags + q = BooleanQuery() + # in_meta = BooleanQuery() + in_content = BooleanQuery() - # 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) + for fld in ['themes', 'content', 'tags', 'authors', 'title']: + in_content.add(BooleanClause(self.make_term_query(tokens, field=fld, fuzzy=False), BooleanClause.Occur.SHOULD)) - # self.searcher.search(q, collector) + topDocs = self.searcher.search(q, only_in, max_results) + for found in topDocs.scoreDocs: + books.append(SearchResult(self.searcher, found)) - # top_groups = collector.getTopGroups(in_content_join, Sort.RELEVANCE, 0, max_results, 0, True) - # if top_groups: - # for grp in top_groups.groups: - # for part in grp.scoreDocs: - # books.append(SearchResult(self.searcher, part, score=grp.maxScore)) return books def multisearch(self, query, max_results=50): @@ -724,8 +841,8 @@ class MultiSearch(Search): Search strategy: - (phrase) OR -> content -> title - -> author - - (keywords) -> author + -> authors + - (keywords) -> authors -> motyw -> tags -> content @@ -768,7 +885,7 @@ class MultiSearch(Search): bks = [] for found in tops.scoreDocs: doc = self.searcher.doc(found.doc) - b = models.Book.objects.get(id=doc.get("book_id")) + b = catalogue.models.Book.objects.get(id=doc.get("book_id")) bks.append(b) print "%s (%d) -> %f" % (b, b.id, found.score) return bks @@ -782,14 +899,15 @@ class MultiSearch(Search): # locate content. snippets = Snippets(stored.get('book_id')).open() try: - text = snippets.get(stored.get('snippets_position'), stored.get('snippets_length')) + text = snippets.get((int(stored.get('snippets_position')), + int(stored.get('snippets_length')))) finally: snippets.close() tokenStream = TokenSources.getAnyTokenStream(self.searcher.getIndexReader(), scoreDoc.doc, field, self.analyzer) # highlighter.getBestTextFragments(tokenStream, text, False, 10) + # import pdb; pdb.set_trace() snip = highlighter.getBestFragments(tokenStream, text, 3, "...") - print('snips: %s' % snip) return [snip] @@ -816,12 +934,20 @@ class MultiSearch(Search): tags = [] for found in tops.scoreDocs: doc = self.searcher.doc(found.doc) - tag = models.Tag.objects.get(id=doc.get("tag_id")) + tag = catalogue.models.Tag.objects.get(id=doc.get("tag_id")) tags.append(tag) print "%s (%d) -> %f" % (tag, tag.id, found.score) return tags + def search_books(self, query, filter=None, max_results=10): + bks = [] + tops = self.searcher.search(query, filter, max_results) + for found in tops.scoreDocs: + doc = self.searcher.doc(found.doc) + bks.append(catalogue.models.Book.objects.get(id=doc.get("book_id"))) + return bks + def create_prefix_phrase(self, toks, field): q = MultiPhraseQuery() for i in range(len(toks)): @@ -836,6 +962,18 @@ class MultiSearch(Search): q.add(t) return q + @staticmethod + def term_filter(term, inverse=False): + only_term = TermsFilter() + only_term.addTerm(term) + + if inverse: + neg = BooleanFilter() + neg.add(FilterClause(only_term, BooleanClause.Occur.MUST_NOT)) + only_term = neg + + return only_term + def hint_tags(self, string, max_results=50): toks = self.get_tokens(string, field='SIMPLE') top = BooleanQuery() @@ -844,11 +982,7 @@ class MultiSearch(Search): q = self.create_prefix_phrase(toks, field) top.add(BooleanClause(q, BooleanClause.Occur.SHOULD)) - book_cat = TermsFilter() - book_cat.addTerm(Term("tag_category", "book")) - - no_book_cat = BooleanFilter() - no_book_cat.add(FilterClause(book_cat, BooleanClause.Occur.MUST_NOT)) + no_book_cat = self.term_filter(Term("tag_category", "book"), inverse=True) return self.search_tags(top, no_book_cat, max_results=max_results) @@ -856,25 +990,22 @@ class MultiSearch(Search): toks = self.get_tokens(string, field='SIMPLE') q = self.create_prefix_phrase(toks, 'title') - only_books = TermsFilter() - only_books.addTerm(Term("is_book", "true")) - - return self.book_search(q, only_books, max_results=max_results) - def filter_by_tags(self, tags): - q = BooleanQuery() - - for tag in tags: - toks = self.get_tokens(tag.name, field='tags') - tag_phrase = PhraseQuery() - for tok in toks: - tag_phrase.add(tok) - q.add(BooleanClause(tok, BooleanClause.Occur.MUST)) + return self.book_search(q, self.term_filter(Term("is_book", "true")), max_results=max_results) - return QueryWrapperFilter(q) + @staticmethod + def chain_filters(filters, op=ChainedFilter.AND): + filters = filter(lambda x: x is not None, filters) + if not filters: + return None + chf = ChainedFilter(JArray('object')(filters, Filter), op) + return chf def filtered_categories(self, tags): cats = {} for t in tags: cats[t.category] = True return cats.keys() + + def hint(self): + return Hint(self)