我正在使用你能想象到的最基本的形式：

<%= semantic_form_for @customer do |f| %>
   <%= f.inputs %>
   <%= f.actions %>   
 <% end %>

我收到以下错误：

Completed 500 Internal Server Error in 652ms

ActionView::Template::Error (undefined method `actions' for #<Formtastic::FormBuilder:0x00000128249018>):
    2: 
    3: <%= semantic_form_for @customer do |f| %>
    4:     <%= f.inputs %>
    5:     <%= f.actions %>
    6:   <% end %>
  app/views/customers/new.html.erb:5:in `block in _app_views_customers_new_html_erb___3455593051620241935_2485943640'
  app/views/customers/new.html.erb:3:in `_app_views_customers_new_html_erb___3455593051620241935_2485943640'

当我评论f.actions时,表格有效.

尝试了我能找到的一切,但我在这一点上非常困难.