form表单的auto_complete

自动提交表单

<% form_tag "/tasks",:method => :get do %>
  <%= select_tag 'project_id', options_for_select(Project.for_select(current_user),params[:project_id].to_i), :onchange => 'this.form.submit()' %>
  <%= text_field_tag :search_content %>
  <%= submit_tag "搜索" %>
<% end %>

 重要的第二行的：onchange => 调用

顺便记录一下：options_for_select（）