ruby

ruby
class ReportsController < ApplicationController
  def monthly_sales
    year = params.fetch(:year, Date.current.year).to_i
    rows = Order.monthly_sales(year: year)
    @report = MonthlySalesReport.new(rows, year: year)

Aggregate Monthly Sales Reports in Rails with group_by SQL and a Presenter

rails postgres reporting
by codesnips 3 tabs
ruby
class DynamicFinder
  def initialize(records)
    @records = records
  end

  def method_missing(method_name, *args, &block)

Metaprogramming with method_missing and define_method

ruby metaprogramming method_missing
by Sarah Mitchell 3 tabs
ruby
class NotificationsChannel < ApplicationCable::Channel
  def subscribed
    stream_for current_user
  end

  def unsubscribed

Action Cable for real-time WebSocket communication

rails actioncable websockets
by Alex Kumar 3 tabs
ruby
class ApplicationPolicy
  attr_reader :user, :record

  def initialize(user, record)
    @user = user
    @record = record

Enforcing Controller Authorization with a Pundit-Style Policy Object in Rails

rails authorization pundit
by codesnips 4 tabs
ruby
class User < ApplicationRecord
  has_secure_password

  RESET_TOKEN_TTL = 30.minutes

  def self.reset_verifier

Signed Password Reset Tokens with ActiveSupport::MessageVerifier in Rails

rails authentication password-reset
by codesnips 3 tabs
erb
<h1>Catalog</h1>

<%= turbo_frame_tag "products" do %>
  <div class="product-grid" data-controller="frame">
    <% @products.each do |product| %>
      <%= render "products/card", product: product %>

Pagination links that escape a Turbo Frame with _top

rails hotwire turbo
by codesnips 4 tabs
erb
<%= tag.div id: dom_id(comment), class: "comment", data: { controller: "comment" } do %>
  <div class="comment__body">
    <%= comment.body %>
  </div>

  <footer class="comment__meta">

Use dom_id everywhere to keep Turbo replacements deterministic

rails hotwire turbo
by codesnips 4 tabs
ruby
class Current < ActiveSupport::CurrentAttributes
  attribute :user, :request_id

  def permissions
    @permissions ||= PermissionSet.new(user)
  end

Memoizing Computed User Permissions Per Request with Current Attributes in Rails

rails authorization caching
by codesnips 4 tabs
javascript
import { Controller } from "@hotwired/stimulus"

export default class extends Controller {
  static targets = ["sentinel"]
  static values = {
    url: String

Infinite scroll with Turbo Frames and Intersection Observer

hotwire turbo stimulus
by Jordan Lee 3 tabs
ruby
class User < ApplicationRecord
  has_many :posts, foreign_key: :author_id

  validates :email, presence: true,
                    uniqueness: { case_sensitive: false },
                    format: { with: URI::MailTo::EMAIL_REGEXP }

Model validations for data integrity

rails activerecord validation
by Alex Kumar 1 tab
yaml
cleanup_expired_sessions:
  cron: '0 2 * * *'  # Daily at 2 AM
  class: CleanupExpiredSessionsWorker
  queue: low
  description: Remove expired sessions from Redis

Background job scheduling with sidekiq-scheduler

rails sidekiq background-jobs
by Alex Kumar 2 tabs
ruby
class WizardsController < ApplicationController
  STEPS = %w[account profile confirm].freeze

  before_action :set_step

  def show

Multi-step wizard navigation with Turbo Frames

rails hotwire turbo
by codesnips 4 tabs