Rails多个复选框--check_box_tag

view

<% @roles.each do |role| %>
  <%= check_box_tag ‘roles[]‘, role.id%>
  <%= label_tag role.name %>
<% end %>  

生成HTML页面效果

<input type="checkbox" value="1" name="roles[]" id="roles_">
<label for="SuperAdmin">Superadmin</label>  

<input type="checkbox" value="2" name="roles[]" id="roles_">
<label for="Teacher">Teacher</label>  

<input type="checkbox" value="3" name="roles[]" id="roles_">
<label for="Student">Student</label>  

controller获得信息

"roles"=>["2", "3"]  #params[:roles]

Rails多个复选框--check_box_tag