ruby code snippets

ruby

namespace :cleanup do
  desc "Enqueue a job to purge expired sessions"
  task expired_sessions: :environment do
    job = ExpiredSessionCleanupJob.perform_later
    Rails.logger.info("[cleanup:expired_sessions] enqueued job #{job.job_id}")
  end

Recurring Cleanup with a Rake Task and an Idempotent Active Job in Rails

rails background-jobs active-job

by codesnips 4 tabs

ruby

Rails.application.routes.draw do
  namespace :api, defaults: { format: :json } do
    namespace :v1 do
      resources :articles, only: [:index, :show, :create, :update, :destroy]
      resources :sessions, only: [:create]
    end

Versioned JSON API Namespace in Rails With a Shared Base Controller

rails api versioning

by codesnips 3 tabs

ruby

# Map - transform elements
[1, 2, 3, 4].map { |n| n * 2 }          # => [2, 4, 6, 8]
['alice', 'bob'].map(&:upcase)          # => ['ALICE', 'BOB']
users.map(&:email)                       # => ['alice@example.com', ...]

# Select/Reject - filter elements

Enumerables and collection manipulation

ruby enumerable collections

by Sarah Mitchell 3 tabs

ruby

class AddSoftDeleteToUsers < ActiveRecord::Migration[7.1]
  def change
    add_column :users, :deleted_at, :datetime

    add_index :users, :deleted_at, where: "deleted_at IS NULL", name: "index_users_on_live"

Soft-Delete with a Default Scope, Restore Action, and Unique Index Guard in Rails

rails activerecord soft-delete

by codesnips 3 tabs

ruby

require 'sinatra'
require 'json'
require_relative 'book'
require_relative 'helpers'

set :books, {

Sinatra Content Negotiation: Serve HTML or JSON by Accept Header

sinatra rack content-negotiation

by codesnips 4 tabs

ruby

class AddSlugToArticles < ActiveRecord::Migration[7.1]
  def change
    add_column :articles, :slug, :string
    add_index :articles, :slug, unique: true

    reversible do |dir|

Auto-Generating URL Slugs in Rails with a before_validation Callback and Friendly Finder

rails activerecord slugs

by codesnips 4 tabs

javascript

import { Turbo } from "@hotwired/turbo-rails"

Turbo.StreamActions.redirect = function () {
  const url = this.getAttribute("url")
  if (!url) return

Turbo Streams: server-driven redirect (Turbo Native friendly)

rails hotwire turbo-streams

by codesnips 4 tabs

ruby

require 'activerecord-import'

class BulkImportPostsService
  BATCH_SIZE = 1000

  def initialize(csv_file_path)

Bulk operations with ActiveRecord import

rails performance activerecord

by Alex Kumar 1 tab

erb

<!DOCTYPE html>
<html>
  <head>
    <title><%= content_for(:title) || "App" %></title>
    <%= csrf_meta_tags %>
    <%= csp_meta_tag %>

Importmap setup for Stimulus controllers (Rails 7 style)

rails hotwire stimulus

by codesnips 4 tabs

erb

<div class="bookmarks">
  <h1>Saved Bookmarks</h1>

  <table>
    <tbody id="bookmarks">
      <%= render partial: "bookmark", collection: @bookmarks %>

Link that submits DELETE with Turbo (data-turbo-method)

rails hotwire turbo

by codesnips 4 tabs

ruby

require "securerandom"

class RedisMutex
  class LockError < StandardError; end

  UNLOCK_SCRIPT = <<~LUA.freeze

Redis-Based Distributed Mutex (with TTL)

rails redis concurrency

by codesnips 2 tabs

ruby

require 'uri'
require 'rack/utils'

module PaginationLinks
  module_function

Cursor-Style Pagination With RFC 5988 Link Headers in Sinatra

sinatra pagination rest-api

by codesnips 3 tabs