codesnips

concerns

ruby 
module EmailNormalization
  extend ActiveSupport::Concern

  included do
    attr_accessor :soft_warnings

Soft Validation: Normalize + Validate Email

rails activerecord validations
by codesnips 4 tabs
ruby 
module Paginatable
  extend ActiveSupport::Concern

  MAX_PER_PAGE = 100
  DEFAULT_PER_PAGE = 25

API Pagination Headers (Link + Total)

rails pagination rest-api
by codesnips 3 tabs
ruby 
module LayoutlessTurboFrame
  extend ActiveSupport::Concern

  included do
    layout :layout_for_turbo
  end

Render without layout for Turbo Frame requests

rails hotwire turbo
by codesnips 4 tabs
ruby 
# Simple mixin
module Loggable
  def log(message)
    puts "[#{Time.now}] #{self.class.name}: #{message}"
  end
end

Module mixins and concerns for code reuse

ruby modules mixins
by Sarah Mitchell 3 tabs
ruby 
module ExistenceChecks
  extend ActiveSupport::Concern

  class_methods do
    def has_any?(conditions = {})
      relation = conditions.present? ? where(conditions) : all

Fast “Exists” Checks with select(1) and LIMIT

rails activerecord performance
by codesnips 4 tabs
ruby 
module ConditionalGet
  extend ActiveSupport::Concern

  private

  def render_conditional(resource, extra: nil)

ETag + Conditional GET for JSON API

rails performance http-caching
by codesnips 2 tabs
ruby 
class CacheNamespace
  attr_reader :name

  def initialize(name, store: Rails.cache)
    @name = name.to_s
    @store = store

Cache Key Versioning with a Single “namespace”

rails caching cache-invalidation
by codesnips 3 tabs
ruby 
module Paginatable
  extend ActiveSupport::Concern

  included do
    before_action :set_pagination_params, only: [:index]
  end

Rails concerns for shared controller behavior

rails concerns controllers
by Maya Patel 2 tabs
ruby 
module DangerousAction
  extend ActiveSupport::Concern

  FRESH_WINDOW = 10.minutes

  class ConfirmationMismatch < StandardError; end

Guard Rails for Dangerous Admin Actions

rails admin security
by codesnips 3 tabs
ruby 
require "loofah"

class HtmlSanitizer
  ALLOWED_TAGS  = %w[p br a strong em ul ol li blockquote code pre h2 h3].freeze
  ALLOWED_ATTRS = %w[href title].freeze
  SAFE_SCHEMES  = %w[http https mailto].freeze

Safer HTML Sanitization Pipeline

rails security xss
by codesnips 4 tabs
ruby 
module Cacheable
  extend ActiveSupport::Concern

  def cache_query(prefix, scope, expires_in: 15.minutes)
    key = [prefix, cache_version_token(scope)].join("/")

Targeted Query Caching for Expensive Endpoints

rails activerecord performance
by codesnips 3 tabs
ruby 
class CreateAuditLogs < ActiveRecord::Migration[7.1]
  def change
    create_table :audit_logs do |t|
      t.references :auditable, polymorphic: true, null: false
      t.references :user, null: true, foreign_key: true
      t.string :action, null: false

Rails Audit Log for Model Changes Using ActiveRecord Callbacks

rails activerecord callbacks
by codesnips 4 tabs