Railsで1つのformで複数のインスタンスを処理する時

new.html.erb

<%= form_for :users, :url => {:action => :create_multi}, :html => {:method => :post}  do |f| %>
  <% 0.upto(3) do |i| %>
    <%= f.text_field :name, :index => i + 1 %>
  <% end %>
  <%= f.submit 'upload' %>
<% end %>

users_controller.rb

def create_multi
  0.upto(3) do |i|
    User.create!(params[:users][i.to_s])
  end
end