ruby

ruby
class CspReportsController < ActionController::API
  def create
    Rails.logger.warn({
      event: 'csp_report',
      report: params.to_unsafe_h,
      ip: request.remote_ip,

CSP report endpoint for monitoring attempted browser policy violations

csp reporting browser-security
by Kai Nakamura 1 tab
ruby
class ProcessUploadJob < ApplicationJob
  queue_as :default

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

ActiveJob for queue adapter abstraction

rails activejob background-jobs
by Alex Kumar 2 tabs
ruby
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

Optimistic Locking for Collaborative Edits

rails activerecord concurrency
by codesnips 3 tabs
ruby
class CreateUserStatsView < ActiveRecord::Migration[6.1]
  def up
    execute <<-SQL
      CREATE VIEW user_stats AS
      SELECT
        users.id AS user_id,

Database view-backed models for complex queries

rails postgresql database
by Alex Kumar 3 tabs
ruby
module CollectionCacheKey
  extend ActiveSupport::Concern

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

Deterministic Cache Keys for Collections

rails caching activerecord
by codesnips 3 tabs
ruby
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

ActiveRecord callbacks for lifecycle hooks

rails activerecord patterns
by Alex Kumar 1 tab
ruby
class PostsController < ApplicationController
  def index
    @posts = Post.published
                 .order(created_at: :desc)
                 .page(params[:page])
                 .per(20)

Infinite scrolling list using lazy Turbo Frames

rails hotwire turbo
by codesnips 4 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
class AddUniqueIndexToTags < ActiveRecord::Migration[7.1]
  disable_ddl_transaction!

  def up
    execute <<~SQL
      UPDATE tags SET name = LOWER(TRIM(name)) WHERE name IS NOT NULL;

Safer “find or create” with Unique Constraint + Retry

rails activerecord concurrency
by codesnips 3 tabs
ruby
class TurboFailureApp < Devise::FailureApp
  def respond
    if turbo_request?
      redirect_for_turbo
    else
      super

Handle 401 responses in Turbo by forcing a full redirect

rails hotwire turbo
by codesnips 4 tabs
ruby
class ExplainAnalyzer
  def initialize(relation, watched_tables:)
    @relation = relation
    @watched_tables = Array(watched_tables).map(&:to_s)
  end

Fast Fail for Missing Indexes (EXPLAIN sanity check)

rails postgres performance
by codesnips 3 tabs
ruby
class NotificationsController < ApplicationController
  def mark_all_read
    current_member.notifications.unread.update_all(read_at: Time.current)

    streams = Turbo::Streams::TagBuilder.new(view_context)

Build Turbo Stream responses in the controller (TagBuilder)

rails hotwire turbo
by Henry Kim 2 tabs