RemiBa

<% if orderitem.alreadyExists? %>
  <%= form_for [@order, orderitem] do |f| %>
	  <%= f.label :quantity %>
		<%= f.number_field :quantity, :min => 1, :value => alreadyexists.quantity.to_i %>
		<%= f.hidden_field :product_id, :value => orderitem.product.id %>
		<%= f.submit 'Change' %>
	<% end %>
<% else %>
	<% item = Orderitem.new(:order => @current_bom, :product => product, :quantity => 0) %>
	<%= form_for [@order, item] do |f| %>