jeremyevans/sequel_postgresql_triggers

Catch unsafe PostgreSQL migrations in development and run them easier in production (code helpers for table/column renaming, changing column type, adding columns with default, background migrations, etc).

Upsert for Rails 5 / Active Record 5

Faster SELECTs when using Sequel with pg

Fear-free migrations for PostgreSQL

Enforces DDL/migration safety in Ruby on Rails project with an emphasis on explicitly choosing trade-offs and avoiding unnecessary magic.

Audit trigger for PostgreSQL

A postgres extension to avoid accidental mistakes

Temporal PostgreSQL (9.4+) system with "flashback" framework for ActiveRecord (7.0+)

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.