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class CachedModelException(Exception): pass
# Our invalidation classes
class CacheInvalidationWarning(CachedModelException): pass
class CacheMissingWarning(CacheInvalidationWarning):
"""
CacheMissingWarning is thrown when we're trying to fetch a queryset
and it's missing objects in the database.
"""
pass
class CacheExpiredWarning(CacheInvalidationWarning):
"""
CacheExpiredWarning is thrown when we're trying to fetch from the cache
but the pre-expiration has been hit.
"""
pass
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