Custom counter_cache functionality that supports conditions and multiple models.
Track changes to your rails models
FriendlyId is the “Swiss Army bulldozer” of slugging and permalink plugins for ActiveRecord. It allows you to create pretty URL’s and work with human-friendly strings as if they were numeric ids for ActiveRecord models.
AASM - State machines for Ruby classes (plain Ruby, ActiveRecord, Mongoid, NoBrainer, Dynamoid)
A tagging plugin for Rails applications that allows for custom tagging along dynamic contexts.
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