fetsite/app/views/calendars/_form.html.erb

<%= semantic_form_for @calendar do |f| %>
  <%= f.inputs do %>
    <%= f.input :name %>
    <%= f.input :public %>
    <%= f.input :picture, :as => :file %>
  <% end %>

  <%= f.actions do %>
    <%= f.action :submit, :as => :input %>
  <% end %>
<% end %>