rails

class ProductsController < ApplicationController
  def index
    @products = Product
      .includes(:category)
      .order(created_at: :desc)
      .page(params[:page])

# Create table migration
class CreateUsers < ActiveRecord::Migration[7.0]
  def change
    create_table :users do |t|
      t.string :email, null: false, index: { unique: true }
      t.string :name, null: false

class SubscriptionsController < ApplicationController
  def new
    @subscription = current_account.subscriptions.new
  end

  def create

<%# renders a lazy placeholder; real content arrives when scrolled into view %>
<div class="panel-card">
  <h3 class="panel-card__title"><%= title %></h3>

  <%= turbo_frame_tag dom_id(panel, :frame),
        class: "panel-card__body",

class ProcessUploadJob < ApplicationJob
  queue_as :default

  retry_on StandardError, wait: :exponentially_longer, attempts: 5
  discard_on ActiveJob::DeserializationError

class AddOptimisticLockingToDocuments < ActiveRecord::Migration[7.1]
  def change
    add_column :documents, :lock_version, :integer, null: false, default: 0
    add_index :documents, :updated_at
  end
end

<turbo-stream action="set_title">
  <template><%= "Inbox (#{@unread_count})" %></template>
</turbo-stream>

class CreateUserStatsView < ActiveRecord::Migration[6.1]
  def up
    execute <<-SQL
      CREATE VIEW user_stats AS
      SELECT
        users.id AS user_id,

module CollectionCacheKey
  extend ActiveSupport::Concern

  def cache_key_for(scope)
    relation = scope.respond_to?(:all) ? scope.all : scope
    model = relation.klass

class User < ApplicationRecord
  has_many :posts, foreign_key: :author_id, dependent: :destroy

  before_validation :normalize_email
  before_create :generate_auth_token
  after_create :send_welcome_email

class PostsController < ApplicationController
  def index
    @posts = Post.published
                 .order(created_at: :desc)
                 .page(params[:page])
                 .per(20)

module LayoutlessTurboFrame
  extend ActiveSupport::Concern

  included do
    layout :layout_for_turbo
  end