パフォーマンス計測用ダミーデータ作成スクリプト

seeds.rb

BULK_UNIT = 100_000
AMOUNT_OF_USERS = 1_000_000
AMOUNT_OF_BOOKS = 3_000_000

USER_ITERATION = AMOUNT_OF_USERS / BULK_UNIT # 10
BOOKS_ITERATION = AMOUNT_OF_BOOKS / BULK_UNIT # 30

(1..USER_ITERATION).each do |n|
  users = []
  BULK_UNIT.times do
    time = Time.current
    users <<
      {
        last_name: Faker::Name.last_name,
        first_name: Faker::Name.first_name,
        age: rand(18..100),
        created_at: time,
        updated_at: time
      }
  end
  User.insert_all users
  p "inserted #{ BULK_UNIT * n } users"
end

(1..BOOKS_ITERATION).each do |n|
   books = []
   BULK_UNIT.times do
    time = Time.current
    books <<
      {
        title: Faker::Book.title,
        price: rand(50..100) * 10,
        user_id: "#{ rand(1..AMOUNT_OF_USERS) }",
        created_at: time,
        updated_at: time
      }
  end
  Book.insert_all books
   p "inserted #{ BULK_UNIT * n } books"
end