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Add ability to clear a cached function result

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Signed-off-by: Dan McGee <dan@archlinux.org>
This commit is contained in:
Dan McGee 2010-10-13 17:55:28 -05:00
parent e2612ab3f6
commit 0c65360e6c
1 changed files with 13 additions and 4 deletions
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17
main/utils.py
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@ -5,6 +5,12 @@
from django.core.cache import cache
from django.utils.hashcompat import md5_constructor
def cache_function_key(func, args, kwargs):
raw = [func.__name__, func.__module__, args, kwargs]
pickled = pickle.dumps(raw, protocol=pickle.HIGHEST_PROTOCOL)
key = md5_constructor(pickled).hexdigest()
return 'cache_function.' + func.__name__ + '.' + key
def cache_function(length):
"""
A variant of the snippet posted by Jeff Wheeler at
@ -19,10 +25,7 @@ def cache_function(length):
"""
def decorator(func):
def inner_func(*args, **kwargs):
raw = [func.__name__, func.__module__, args, kwargs]
pickled = pickle.dumps(raw, protocol=pickle.HIGHEST_PROTOCOL)
key = md5_constructor(pickled).hexdigest()
key = 'cache_function.' + func.__name__ + '.' + key
key = cache_function_key(func, args, kwargs)
value = cache.get(key)
if value is not None:
return value
@ -33,5 +36,11 @@ def inner_func(*args, **kwargs):
return inner_func
return decorator
def clear_cache_function(func, args, kwargs):
key = cache_function_key(func, args, kwargs)
cache.delete(key)
#utility to make a pair of django choices
make_choice = lambda l: [(str(m), str(m)) for m in l]
# vim: set ts=4 sw=4 et: