Seeder example

seed.rb

class Seeder
  def create_data
    100.times do
      create_user
      create_event
    end
  end

  private

  def create_user
    first_name = Faker::Name.first_name
    last_name  = Faker::Name.last_name

    user = User.create(name: "#{first_name} #{last_name}")
    puts "Created user #{user.name}"
  end

  def create_event
    event = Event.create(
      type:       events[Random.rand(0..3)],
      created_at: Time.parse("2013-07-20 #{Random.rand(0..23)}:#{Random.rand(0..59)}:#{Random.rand(0..59)} UTC")
      )

    event.users << User.last

    case event.type
    when "high-five-another-user"
      event.users << User.skip(1).last
    when "comment"
      comment       = create_comment
      event.comment = comment
      puts "Created comment #{comment.message}"
    end

    puts "Created event #{event.id}"
  end

  def create_comment
    Comment.create(message: Faker::Lorem.sentence)
  end

  def events
    [
      "enter-the-room",
      "leave-the-room",
      "comment",
      "high-five-another-user"
    ]
  end
end

Seeder.new.create_data

For this to work, you need to have installed the faker gem (https://github.com/stympy/faker).