Fix sponsor key field extraction
When extracting key field there is no sponsor or user object, instead
only their link names are known.
"Dummy cache backend"
from django.core.cache.backends.base import BaseCache
class CacheClass(BaseCache):
def __init__(self, *args, **kwargs):
pass
def add(self, *args, **kwargs):
return True
def get(self, key, default=None):
return default
def set(self, *args, **kwargs):
pass
def delete(self, *args, **kwargs):
pass
def get_many(self, *args, **kwargs):
return {}
def has_key(self, *args, **kwargs):
return False