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Fixed #26462 -- Fixed Python 2 UnicodeEncodeError when warning about long cache keys.

This commit is contained in:
Przemysław Suliga 2016-04-04 20:18:11 +02:00 committed by Tim Graham
parent 369fa471f4
commit 90ce5d46bf
2 changed files with 19 additions and 3 deletions
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2
django/core/cache/backends/base.py vendored
View File

@ -235,7 +235,7 @@ class BaseCache(object):
"""
if len(key) > MEMCACHE_MAX_KEY_LENGTH:
warnings.warn('Cache key will cause errors if used with memcached: '
'%s (longer than %s)' % (key, MEMCACHE_MAX_KEY_LENGTH),
'%r (longer than %s)' % (key, MEMCACHE_MAX_KEY_LENGTH),
CacheKeyWarning)
for char in key:
if ord(char) < 33 or ord(char) == 127:

20
tests/cache/tests.py vendored
View File

@ -585,15 +585,31 @@ class BaseCacheTests(object):
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter("always")
# memcached does not allow whitespace or control characters in keys
cache.set('key with spaces', 'value')
key = 'key with spaces and 清'
cache.set(key, 'value')
self.assertEqual(len(w), 1)
self.assertIsInstance(w[0].message, CacheKeyWarning)
self.assertEqual(
# warnings.warn() crashes on Python 2 if message isn't
# coercible to str.
str(w[0].message.args[0]),
"Cache key contains characters that will cause errors if used "
"with memcached: %r" % key,
)
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter("always")
# memcached limits key length to 250
cache.set('a' * 251, 'value')
key = ('a' * 250) + '清'
cache.set(key, 'value')
self.assertEqual(len(w), 1)
self.assertIsInstance(w[0].message, CacheKeyWarning)
self.assertEqual(
# warnings.warn() crashes on Python 2 if message isn't
# coercible to str.
str(w[0].message.args[0]),
'Cache key will cause errors if used with memcached: '
'%r (longer than %s)' % (key, 250),
)
finally:
cache.key_func = old_func