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16,777–16,800 of 22,033 · Most stars

Counter caches for Rails computed from any block, such as conditional counts or sums, kept up to date by callbacks on any number of models and stored in a column, a shared counters table or your cache store. Recounts run after commit, so concurrent saves can't leave a stale value.

A collection of short notes about Nix, each contributing to the same virtual machine image