Ruby snippets

bulk_api_example.rb

# Bulk API design
#
# resources :posts
class PostsController < ActiveController::Base
  # GET /posts/1,4,50,90
  # post_url([ @post, @post ])
  def show_many
    @posts = Post.find(params[:ids])
  end

  # PUT /posts/1,4,50,90
  def update_many
    @posts = Post.find(params[:ids])

    Post.transaction do
      @posts.each do |post|
        post.update_attributes!(params[:posts][post.id])
      end
    end
  end
  
  # POST /posts/many
  def create_many
  end

  # DELETE /posts/1,4,50,90
  def destroy_many
  end
end

class_names_port.rb

module ClassNamesHelper
  def class_names(*args)
    classes = []
    args.each do |arg|
      next unless arg

      classes << classes_factory(arg)
    end
    classes.join(" ")
  end

  private

  def classes_factory(arg)
    if arg.is_a?(String || Numeric)
      arg
    elsif arg.is_a? Array
      arg.map { |a| class_names(a) }
    elsif arg.is_a? Hash
      arg.each_key.select { |key| arg[key].present? }
    end
  end
end

inline_active_job.rb

# spec/support/inline_active_job.rb
# Source: https://gitanswer.com/rails-rails-6-inconsistently-overrides-activejob-queue-adapter-setting-with-testadapter-ruby-496901128#553927324
# useful when testing Turbo with ActiveJob and rspec capybara
RSpec.configure do |config|
  config.around(:each, type: :request) do |example|
    original_queue_adapter = ActiveJob::Base.queue_adapter
    descendants = ActiveJob::Base.descendants + [ActiveJob::Base]

    ActiveJob::Base.queue_adapter = :inline
    descendants.each(&:disable_test_adapter)
    example.run
    descendants.each { |a| a.enable_test_adapter(ActiveJob::QueueAdapters::TestAdapter.new) }
    ActiveJob::Base.queue_adapter = original_queue_adapter
  end
end

prerender_recache.rb

require 'net/http'
require 'json'
require 'uri'

class Prerender
  ENDPOINTS = "https://api.prerender.io".freeze

  def initialize(url, prerender_token)
    @url = url
    @prerender_token = prerender_token
  end

  def recache
    post_params = {
      url: url,
      prerenderToken: prerender_token
    }

    res = Net::HTTP.post(
      URI("#{ENDPOINTS}/recache"),
      post_params.to_json,
      'Content-Type' => 'application/json'
    )

    if res.code == '200'
      puts "Successfully recache URL #{url}"
    else
      puts res.body
    end
  end

  private

  attr_reader :url, :prerender_token
end

spinner.rb

class Spinner
  def initialize printer=nil
    @spinner = %w[| / - \\]
    @count   = 0
    @printer ||= $stderr
  end

  def print
    @printer.print "\r"+@spinner[@count]
    @count += 1
    @count = 0 if @count > @spinner.size - 1
  end

  def self.print
    @spinner ||= new
    @spinner.print
  end
end

# 50.times{ Spinner.print; sleep 0.1 }