Ruby & Rails 进阶技巧视频教程 01 用多进程来提高代码运行速度

https://github.com/grosser/parallel

https://github.com/jfelchner/ruby-progressbar

修改后：

# frozen_string_literal: true

namespace :db do
  desc "Fill database with sample data"
  task populate: :environment do
    make_user!
    make_posts!
    make_admin_users!
  end
end

PASSWORD = "qiuzhi99pro"

def make_user!
  Parallel.map(1..30, progress: "Creating users...") do
    email = Faker::Internet.email
    User.create!(email: email,
                 password: PASSWORD,
                 password_confirmation: PASSWORD)
  end
end

def make_posts!
  Parallel.map(1..30, progress: "Creating posts...") do
    Post.create! title: Faker::Name.name, body: "</h1>#{Faker::Lorem.sentence(word_count: 5)}</h1>"
  end
end

def make_admin_users!
  Parallel.map(1..30, progress: "Creating admin_users...") do
    AdminUser.create! email: Faker::Internet.email, password: PASSWORD,
                      admin_profile_attributes: { fullname: Faker::Name.name }
  end
end

修改前：

# frozen_string_literal: true

namespace :db do
  desc "Fill database with sample data"
  task populate: :environment do
    make_user!
    make_posts!
    make_admin_users!
  end
end

def make_user!
  bar = ProgressBar.create
  password = "qiuzhi99pro"
  puts "Creating users..."
  User.create!(email: "me@#{ENV['domain']}",
               password: password,
               password_confirmation: password)

  30.times do
    bar.increment
    email = Faker::Internet.email
    User.create!(email: email,
                 password: password,
                 password_confirmation: password)
  end
end

def make_posts!
  bar = ProgressBar.create
  puts "Creating posts..."
  30.times do
    bar.increment
    Post.create! title: Faker::Name.name, body: "</h1>#{Faker::Lorem.sentence(word_count: 5)}</h1>"
  end
end

def make_admin_users!
  bar = ProgressBar.create
  puts "Creating admin_users..."
  (1..30).each do |n|
    bar.increment
    AdminUser.create! email: "example-#{n + 1}@#{ENV['domain']}", password: "qiuzhi99pro",
                      admin_profile_attributes: { fullname: Faker::Name.name }
  end
end