Screencast: Bullet

Downloads in verschiedenen Formaten:

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Resourcen:

• Bullet

terminal

[bash] rails g migration add_products_count_to_categories products_count:integer rails g migration cache_products_count rake db:migrate [/bash]

Gemfile

[ruby]

gem ‘bullet’, group: :development [/ruby]

config/initializers/bullet.rb

[ruby]

if defined? Bullet Bullet.enable = true # Bullet.alert = true Bullet.bullet_logger = true end [/ruby]

categories_controller.rb

[ruby]

def index @categories = Category.order(:name).includes(:products) end [/ruby]

db/migrate/cache_products_count.rb

[ruby]

class CacheProductsCount < ActiveRecord::Migration def up execute “update categories set products_count=(select count(*) from products where category_id=categories.id)” end

def down end end [/ruby]