Hello django friends, Problems: -------- 1) MemcachedKeyCharacterError: Control characters not allowed 2) MemcachedKeyLengthError: Key length is > 250
We where conflicted with problem number one, but the solution should also work for the second error which did not happen on our system. System-Information: ------------------- Host: Ubuntu Server 10_04 Django: Django-1.2.4 CACHE-backend: memcached Solution: -------- as suggested by http://evanculver.com/2010/03/30/simple-fix-for-python-memcached-memcachedkeylengtherror-and-memcachedkeycharactererror/ I took his wrapper and adjusted it for django-1.2.4: (adjustment just added default=None as it is commented in the provided code) ---------------------------------------------------- MyMemchacedWrapper.py --------------------- from django.core.cache.backends import memcached from django.utils.encoding import smart_str """ Simple Django cache backend overrides for dealing with python-memcached differences between cmemcache. For Django 1.2. All methods except `set_many` and `delete_many` will work for Django 1.1 Use by pointing to it in settings, for example: CACHE_BACKEND = myproject.contrib.thisfile://127.0.0.1:11211 """ class CacheClass(memcached.CacheClass): "Filter key through `_smart_key` before sending to backend for all cases" def __init__(self, server, params): super(CacheClass,self).__init__(server, params) def add(self, key, value, timeout=0): return super(CacheClass, self).add(self._smart_key(key), value, timeout) def get(self, key, default=None): return super(CacheClass, self).get(self._smart_key(key), default=None) #here default=None had to be added for django1.2.4 def set(self, key, value, timeout=0): super(CacheClass, self).set(self._smart_key(key), value, timeout) def delete(self, key): super(CacheClass, self).delete(self._smart_key(key)) def _smart_key(self, key): "Truncate all keys to 250 or less and remove control characters" return smart_str(''.join([c for c in key if ord(c) > 32 and ord(c) != 127]))[:250] in local_settings.py we point to: -------------------------------- CACHE_BACKEND = "store.cache.MyMemcachedWrapper.py://127.0.0.1:11211/" Now everything works just fine. please comment my solution. I feel uncomfortable with it, and want to know how you solved the problem? There is not really a lot to find about concerning these issues. I think you guys do use a totally other solution, because I could hardly find anything about that issues. (searchtime two days.) How do you cache? and why is there not a lot more talk about the errors on the web? Am I missing something? Thanks for your replies in advance! ionic -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
