def search(tags=None, tag_ids=None):
"""
Find all objects whose tags make superset of given tags.
If any unknown tag given or none tags given at all, returns None.
Otherwise, returns SearchCache object.
"""
if tags:
tags = split_tags(tags)
if not tags:
return None # if no tag given, don't just return all objects
# what if an unknown tag is in the list?
tag_ids = list(get_available_tags(tags).values_list('id', flat=True))
if len(tag_ids) != len(tags):
return None # unknown tag given
elif not tag_ids:
return None
else:
tag_ids = split_tag_ids(tag_ids)
# Sort by id before calling.
return _search_and_cache(sorted(tag_ids))
def test_split_tag_ids(self):
CHECK = lambda x, y, z = None: self.assertEqual(split_tag_ids(x), y, z)
CHECK("123", [123])
CHECK("10,20,30,40,50,15", [10, 20, 30, 40, 50, 15])
CHECK("50, 40, 30, 25", [50, 40, 30, 25])
CHECK([20, 10, 30], [20, 10, 30], "should accept lists")
