Rails

• App vs Lib

• Avoid environment based conditionals

• Use tag helpers rather than strings to assemble HTML

• Build views with view components

• Prefer CRUD actions in controllers

• Avoid rescuing StandardError

• Don’t misuse modules and concerns

• Make small, atomic Sidekiq jobs

• Avoid using instance variables in view partials and helpers

• Only store ephemeral objects in the cache

• Hyphenated URL paths

• Prefer constant lookups over constantize

• Handle errors using Rails.error

• Prefer Sidekiq

• Avoid querying sets of objects from models/controllers

• Send Segment events inline rather than in background jobs

• Avoid ActiveRecord callbacks

• Set a TTL on every cached object

• Avoid creating static references to record instances

• Two step deploy when table is being dropped and references to it are being removed

• Use Citext extension for Case InSensitive Columns

• Use namespacing for apps and events

• Use null object pattern to simplify code around guest users

• Use one service object per endpoint

• Validate correctly on the edge of the app