Ideas for caching collection counts

gistfile1.txt

# Hexdigest the params hash down to a string representation
params_digest = Digest::SHA1.hexdigest(params.to_s)

# Use the key in combination with namespace to create cache key
cache_key = "collection_counts.#{params_digest}"

# Cache the result using Redis.cache.fetch
# Set a sane default expiration period
Rails.cache.fetch(cache_key, expires_in: 12.hours) { scope.size }

# Later on we can use Redis as the cache store