codesnips

rails

erb 
<!DOCTYPE html>
<html>
  <head>
    <title>Contacts</title>
    <%= csrf_meta_tags %>
    <%= csp_meta_tag %>

Turbo Frames modal: load, submit, then close via stream

rails turbo hotwire
by codesnips 4 tabs
ruby 
module RetryableTransaction
  module_function

  RETRIABLE = [ActiveRecord::Deadlocked, ActiveRecord::LockWaitTimeout].freeze

  def run(max_retries: 3, base_delay: 0.05, &block)

Deadlock-Aware Retry Wrapper

rails postgres reliability
by codesnips 3 tabs
ruby 
class Post < ApplicationRecord
  # View counter - increments without hitting the database
  kredis_counter :view_count, expires_in: 1.day

  # Recent viewers list - stores last 10 viewer IDs
  kredis_unique_list :recent_viewers, limit: 10

Rails Kredis for higher-level Redis operations

rails redis kredis
by Maya Patel 2 tabs
ruby 
module Idempotency
  extend ActiveSupport::Concern

  included do
    before_action :check_idempotency_key, only: [:create, :update]
    after_action :store_idempotent_response, only: [:create, :update]

Request deduplication with idempotency keys

rails api reliability
by Alex Kumar 1 tab
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 Api
  module V1
    class PostsController < ApplicationController
      def create
        post = current_user.posts.build(post_params)

Rails strong parameters for nested attributes

rails security strong-parameters
by Maya Patel 1 tab
ruby 
class CreateMaintenanceTasks < ActiveRecord::Migration[7.0]
  def change
    create_table :maintenance_tasks do |t|
      t.string :name, null: false
      t.string :state, null: false, default: "pending"
      t.datetime :started_at

Database-Backed “Run Once” Migrations for Maintenance Tasks

rails migrations background-jobs
by codesnips 3 tabs
ruby 
class CreateEmailDeliveries < ActiveRecord::Migration[7.1]
  def change
    create_table :email_deliveries do |t|
      t.string :dedupe_key, null: false
      t.string :mailer, null: false
      t.string :action, null: false

Transactional Email “Send Once” with Delivered Marker

rails reliability activerecord
by codesnips 4 tabs
erb 
<div id="toasts" class="fixed right-4 top-4 z-50 space-y-2"></div>

Toast notifications delivered with Turbo Streams

rails hotwire turbo
by Henry Kim 2 tabs
erb 
<%# Append is also broadcast from the model; this response scrolls the author's view %>
<%= turbo_stream.append "messages" do %>
  <%= render partial: "messages/message", locals: { message: @message } %>
<% end %>

<turbo-stream action="scroll_to" target="<%= dom_id(@message) %>" behavior="smooth" block="end">

Scroll into view after append using a custom Turbo Stream action

rails hotwire turbo
by codesnips 4 tabs
ruby 
require "faraday"
require "faraday/retry"

module Http
  class RetryableError < StandardError; end
  class CircuitOpenError < StandardError; end

HTTP Timeouts + Retries Wrapper (Faraday)

rails http reliability
by codesnips 3 tabs
yaml 
:concurrency: 10
:queues:
  - [critical, 4]
  - [default, 2]
  - [low, 1]

Background jobs with Sidekiq and reliable queues

rails sidekiq background-jobs
by Alex Kumar 2 tabs