rails

ruby
json.array! @posts do |post|
  json.cache! ['v1', post], expires_in: 1.hour do
    json.id post.id
    json.title post.title
    json.excerpt post.excerpt
    json.published_at post.published_at

Fragment caching for expensive JSON serialization

rails caching performance
by Alex Kumar 1 tab
ruby
module ApplicationCable
  class Connection < ActionCable::Connection::Base
    identified_by :current_member

    def connect
      self.current_member = env['warden']&.user || reject_unauthorized_connection

Presence indicator with ActionCable + Turbo Streams

rails hotwire turbo
by Henry Kim 3 tabs
ruby
class AddSettingsToAccounts < ActiveRecord::Migration[7.1]
  disable_ddl_transaction!

  def change
    add_column :accounts, :settings, :jsonb, null: false, default: {}

Postgres JSONB Partial Index for Feature Flags

rails postgres jsonb
by codesnips 3 tabs
ruby
module EmailNormalization
  extend ActiveSupport::Concern

  included do
    attr_accessor :soft_warnings

Soft Validation: Normalize + Validate Email

rails activerecord validations
by codesnips 4 tabs
ruby
class Comment < ApplicationRecord
  belongs_to :post, touch: true
  belongs_to :author, class_name: "User"

  validates :body, presence: true, length: { maximum: 10_000 }

Granular Cache Invalidation with touch: true

rails caching activerecord
by codesnips 4 tabs
javascript
import { Application } from "@hotwired/stimulus"
import FormSubmitController from "./controllers/form_submit_controller"

const application = Application.start()
application.debug = false

Disable submit button while Turbo form is submitting

rails hotwire stimulus
by codesnips 3 tabs
javascript
import { Controller } from "@hotwired/stimulus"

export default class extends Controller {
  static values = {
    url: String,
    delay: { type: Number, default: 800 },

Stimulus: autosave draft with Turbo-friendly requests

rails stimulus hotwire
by codesnips 3 tabs
ruby
class Comment < ApplicationRecord
  belongs_to :article
  belongs_to :author, class_name: "User"

  validates :body, presence: true, length: { maximum: 2_000 }

Live comments with model broadcasts + turbo_stream_from

rails hotwire turbo
by codesnips 4 tabs
ruby
# Installation
# rails active_storage:install
# rails db:migrate

# config/storage.yml
local:

ActiveStorage for file uploads and attachments

ruby rails active-storage
by Sarah Mitchell 2 tabs
erb
<%# private stream: turbo signs the serialized record name %>
<%= turbo_stream_from current_user %>

<section class="notifications">
  <h1>Notifications</h1>

Turbo Streams + authorization: signed per-user stream name

rails turbo hotwire
by codesnips 3 tabs
erb
<h1>Products</h1>

<%= form_with url: products_path, method: :get,
              data: { turbo_frame: "products_list", turbo_action: "advance" } do |f| %>
  <div class="filters">
    <%= f.text_field :q, value: params[:q], placeholder: "Search products" %>

Frame navigation that targets a specific frame via form_with

rails hotwire turbo
by codesnips 3 tabs
erb
<div data-controller="disclosure">
  <button type="button" data-action="disclosure#toggle" aria-expanded="false" class="font-medium">
    Advanced
  </button>
  <div data-disclosure-target="panel" class="mt-2 hidden">
    <%= render 'advanced_filters' %>

Collapse/expand UI with Stimulus that survives Turbo swaps

rails hotwire stimulus
by Henry Kim 2 tabs