Lookup no longer crashes if all type prefixes are bogus.

[zzz-pokedex.git] / pokedex / lookup.py

diff --git a/pokedex/lookup.py b/pokedex/lookup.py
index 2565fcc..60a6a56 100644 (file)
--- a/pokedex/lookup.py
+++ b/pokedex/lookup.py
@@ -228,10 +228,11 @@ def _whoosh_records_to_results(records, session, exact=True):
 def lookup(input, valid_types=[], session=None, indices=None, exact_only=False):
     """Attempts to find some sort of object, given a database session and name.
 
-    Returns a list of named (object, name, language, exact) tuples.  `object`
-    is a database object, `name` is the name under which the object was found,
-    `language` is the name of the language in which the name was found, and
-    `exact` is True iff this was an exact match.
+    Returns a list of named (object, name, language, iso3166, exact) tuples.
+    `object` is a database object, `name` is the name under which the object
+    was found, `language` and `iso3166` are the name and country code of the
+    language in which the name was found, and `exact` is True iff this was an
+    exact match.
 
     This function currently ONLY does fuzzy matching if there are no exact
     matches.
@@ -331,7 +332,9 @@ def lookup(input, valid_types=[], session=None, indices=None, exact_only=False):
     type_terms = []
     for valid_type in valid_types:
         table_name = _parse_table_name(valid_type)
-        type_terms.append(whoosh.query.Term(u'table', table_name))
+        if table_name:
+            # Quietly ignore bogus valid_types; more likely to DTRT
+            type_terms.append(whoosh.query.Term(u'table', table_name))
 
     if type_terms:
         query = query & whoosh.query.Or(type_terms)
@@ -376,11 +379,17 @@ def random_lookup(valid_types=[], session=None, indices=None):
             tables.append(indexed_tables[table_name])
 
     if not tables:
+        # n.b.: It's possible we got a list of valid_types and none of them
+        # were valid, but this function is guaranteed to return *something*, so
+        # it politely selects from the entire index isntead
         tables = indexed_tables.values()
 
     # Rather than create an array of many hundred items and pick randomly from
     # it, just pick a number up to the total number of potential items, then
-    # pick randomly from that, and partition the whole range into chunks
+    # pick randomly from that, and partition the whole range into chunks.
+    # This also avoids the slight problem that the index contains more rows
+    # (for languages) for some items than others.
+    # XXX ought to cache this (in the index?) if possible
     total = 0
     partitions = []
     for table in tables: