Alex Kumar

class ExternalApiClient
  def fetch_user_data(user_id)
    ActiveSupport::Notifications.instrument(
      'api.external_service',
      service: 'user_service',
      operation: 'fetch_user',

class ProcessUploadJob < ApplicationJob
  queue_as :default

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

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

Rails.application.config.middleware.insert_before(
  Rack::Runtime,
  Rack::Timeout,
  service_timeout: 15  # 15 seconds
)

class CreateApiKeys < ActiveRecord::Migration[6.1]
  def change
    create_table :api_keys do |t|
      t.references :user, null: false, foreign_key: true
      t.string :name, null: false
      t.string :key_digest, null: false

# In rails console
query = Post.joins(:author)
           .where(published_at: 1.week.ago..Time.current)
           .where(users: { status: 'active' })
           .order(created_at: :desc)

amazon:
  service: S3
  access_key_id: <%= Rails.application.credentials.dig(:aws, :access_key_id) %>
  secret_access_key: <%= Rails.application.credentials.dig(:aws, :secret_access_key) %>
  region: us-east-1
  bucket: <%= Rails.application.credentials.dig(:aws, :bucket) %>

module Api
  module V1
    class UsersController < BaseController
      def show
        user = User.includes(:profile).find(params[:id])

cleanup_expired_sessions:
  cron: '0 2 * * *'  # Daily at 2 AM
  class: CleanupExpiredSessionsWorker
  queue: low
  description: Remove expired sessions from Redis

class PasswordResetsController < ApplicationController
  before_action :find_user_by_token, only: [:edit, :update]

  def create
    user = User.find_by(email: params[:email]&.downcase)

Apartment.configure do |config|
  config.excluded_models = %w[Tenant User]
  config.tenant_names = -> { Tenant.pluck(:schema_name) }
  config.use_schemas = true
end

module MyApp
  class Application < Rails::Application
    config.load_defaults 6.1

    # Enable response compression
    config.middleware.use Rack::Deflater