# retrieve something from the index
indexed_tables = {}
for cls in [
+ tables.Ability,
+ tables.Item,
+ tables.Move,
tables.Pokemon,
+ tables.Type,
]:
indexed_tables[cls.__tablename__] = cls
+# Dictionary of extra keys to file types of objects under, e.g. Pokémon can
+# also be looked up purely by number
+extra_keys = {
+ tables.Move: [
+ lambda row: u"move %d" % row.id,
+ ],
+ tables.Pokemon: [
+ lambda row: unicode(row.id),
+ ],
+}
+
index_bits = {}
def get_index(session):
"""Returns (index, speller).
store = whoosh.store.RamStorage()
schema = whoosh.fields.Schema(
name=whoosh.fields.ID(stored=True),
- spelling_name=whoosh.fields.ID(stored=True),
table=whoosh.fields.STORED,
row_id=whoosh.fields.STORED,
language_id=whoosh.fields.STORED,
)
+ # Construct a straight lookup index
index = whoosh.index.Index(store, schema=schema, create=True)
writer = index.writer()
# Index every name in all our tables of interest
+ speller_entries = []
for cls in indexed_tables.values():
q = session.query(cls)
q = q.filter_by(forme_base_pokemon_id=None)
for row in q.yield_per(5):
+ row_key = dict(table=cls.__tablename__, row_id=row.id)
+
+ # Spelling index only indexes strings of letters, alas, so we
+ # reduce every name to this to make the index work. However, exact
+ # matches are not returned, so e.g. 'nidoran' would neither match
+ # exactly nor fuzzy-match. Solution: add the spelling-munged name
+ # as a regular index row too.
name = row.name.lower()
- spelling_name = re.sub('[^a-z]', '', name)
- writer.add_document(name=name,
- spelling_name=spelling_name,
- table=cls.__tablename__,
- row_id=row.id)
+ writer.add_document(name=name, **row_key)
+
+ speller_entries.append(name)
+
+ for extra_key_func in extra_keys.get(cls, []):
+ extra_key = extra_key_func(row)
+ writer.add_document(name=extra_key, **row_key)
writer.commit()
- ### Construct a spell-checker index
+ # Construct and populate a spell-checker index. Quicker to do it all
+ # at once, as every call to add_* does a commit(), and those seem to be
+ # expensive
speller = whoosh.spelling.SpellChecker(index.storage)
-
- # Can't use speller.add_field because it tries to intuit a frequency, and
- # names are in an ID field, which seems to be immune to frequency.
- # Not hard to add everything ourselves, though
- reader = index.doc_reader()
- speller.add_words([ _['spelling_name'] for _ in reader ])
- reader.close()
+ # WARNING: HERE BE DRAGONS
+ # whoosh.spelling refuses to index things that don't look like words.
+ # Unfortunately, this doesn't work so well for Pokémon (Mr. Mime,
+ # Porygon-Z, etc.), and attempts to work around it lead to further
+ # complications.
+ # The below is copied from SpellChecker.add_scored_words without the check
+ # for isalpha(). XXX get whoosh patched to make this unnecessary!
+ writer = whoosh.writing.IndexWriter(speller.index())
+ for word in speller_entries:
+ fields = {"word": word, "score": 1}
+ for size in xrange(speller.mingram, speller.maxgram + 1):
+ nga = whoosh.analysis.NgramAnalyzer(size)
+ gramlist = [t.text for t in nga(word)]
+ if len(gramlist) > 0:
+ fields["start%s" % size] = gramlist[0]
+ fields["end%s" % size] = gramlist[-1]
+ fields["gram%s" % size] = " ".join(gramlist)
+ writer.add_document(**fields)
+ writer.commit()
+ # end copy-pasta
index_bits['index'] = index
index_bits['speller'] = speller
exact = True
- # Alas! We have to make three attempts to find anything with this index.
- # First: Try an exact match for a name in the index.
- # Second: Try an exact match for a stripped-down name in the index.
- # Third: Get spelling suggestions.
- # The spelling module apparently only indexes *words* -- that is, [a-z]+.
- # So we have a separate field that contains the same name, stripped down to
- # just [a-z]+.
- # Unfortunately, exact matches aren't returned as spelling suggestions, so
- # we also have to do a regular index match against this separate field.
- # Otherwise, 'nidoran' will never match anything
index, speller = get_index(session)
- # Look for exact name
- parser = QueryParser('name', schema=index.schema)
- results = index.find(name.lower(), parser=parser)
+ # Look for exact name. A Term object does an exact match, so we don't have
+ # to worry about a query parser tripping on weird characters in the input
+ searcher = index.searcher()
+ query = whoosh.query.Term('name', name)
+ results = searcher.search(query)
if not exact_only:
- # Look for a match with a reduced a-z name
- if not results:
- parser = QueryParser('spelling_name', schema=index.schema)
- results = index.find(name.lower(), parser=parser)
-
# Look for some fuzzy matches
if not results:
- results = []
exact = False
+ results = []
for suggestion in speller.suggest(name, 3):
- results.extend( index.find(suggestion, parser=parser) )
+ query = whoosh.query.Term('name', suggestion)
+ results.extend(searcher.search(query))
# Convert results to db objects
objects = []
projects / zzz-pokedex.git / blobdiff