def cache_key(*keys, **pairs):
"""Smart key maker, returns the object itself if a key, else a list
delimited by ':', automatically hashing any non-scalar objects."""
if is_string_like(keys):
keys = [keys]
if is_list_or_tuple(keys):
if len(keys) == 1 and is_list_or_tuple(keys[0]):
keys = keys[0]
else:
keys = [md5_hash(keys)]
if pairs:
keys = list(keys)
klist = pairs.keys()
klist.sort()
for k in klist:
keys.append(k)
keys.append(pairs[k])
key = KEY_DELIM.join([_hash_or_string(x) for x in keys])
prefix = CACHE_PREFIX + KEY_DELIM
if not key.startswith(prefix):
key = prefix+key
return key.replace(" ", ".")
def _hash_or_string(key):
if is_string_like(key) or isinstance(key, (types.IntType, types.LongType, types.FloatType)):
return smart_str(key)
else:
try:
#if it has a PK, use it.
return str(key._get_pk_val())
except AttributeError:
return md5_hash(key)