categories.rb

# spec/factories/categories.rb
require 'ffaker'

FactoryGirl.define do
  factory :category do
    name        { Category::CATEGORIES.sample }
    description FFaker::Lorem.sentences
  end
end

clients.rb

# spec/factories/clients.rb
require 'ffaker'
require 'securerandom'

FactoryGirl.define do
  factory :client do
    categories do
      tmp = Category::CATEGORIES.sample(2)
      [Category.new(name: tmp[0]), Category.new(name: tmp[1])]
    end
    locations           { (1..5).map { FactoryGirl.build(:location) } }
    username do
      "#{SecureRandom.base64(4)}#{FFaker::Internet.user_name}".downcase
    end
    email { "#{SecureRandom.base64(4)}#{FFaker::Internet.email}".downcase }
    password 'qwertyqwerty'
    name { "#{FFaker::Company.name}#{SecureRandom.base64(4)}" }
    rates []
    image_url { FFaker::Internet.http_url }
    addresses { (1..5).map { FFaker::Address.street_address } }
    token { [SecureRandom.base64] }

    factory :client_with_discounts do
      discounts { (1..5).map { FactoryGirl.build(:discount) } }
    end
    factory :client_with_plan do
      client_plans do
        plan = Plan.all.sample
        [plan.to_client_plan]
      end
    end
    factory :client_with_expired_plan do
      client_plans do
        plan = Plan.all.sample
        plan = plan.to_client_plan
        plan.expired_date = Time.zone.now - 1.minute
        [plan]
      end
    end
  end
end

discounts.rb

# spec/factories/discounts.rb
require 'ffaker'

FactoryGirl.define do
  factory :discount do
    after(:build)     { |discount| discount.categories.concat( (1..2).map { FactoryGirl.build(:category) }) }
    discount_rate     { rand(60) }
    duration_term     'minutes'
    title             { FFaker::Product.product }
    secret_key        { "#{title}_secret_key" }
    status            true
    duration          { Discount::DURATIONS.sample }
    created_at        Time.now
    hashtags          { (1..5).map { "##{FFaker::Lorem.word}" }}
  end
end

seed.rb

# rake db:seed
require 'ffaker'
require 'factory_girl_rails'

puts 'Creating 100 random clients with discounts'
threads = (1..10).map do
  Thread.new do
    client_with_discounts = (1..10).map do
      FactoryGirl.attributes_for :client_with_discounts
    end
    Client.create! client_with_discounts
  end
end
threads.map!(&:join)
puts 'End creating fixed clients'

time rake db:seed
Creating 100 random clients with discounts
Finished creating 100 random clients with discounts

real	3m24.685s
user	3m24.583s
sys	0m0.372s