Using multiple submit buttons

items_controller.rb

class ItemsController < ApplicationController
  def create
    @item = Item.create!(item_params)    
  end

private

  def item_params
    params.require(:item).permit(:name, :public)
  end
end

new.html.erb

<%= form_for @item do |f| %>
  <%= f.label :name %>
  <%= f.text_field :name %>

  <%= f.button "Create Private Item", name: "item[public]", value: false %>
  <%= f.button "Create Public Item",  name: "item[public]", value: true  %>
<% end %>