rails checkbox

通过获取的id值来设定相应的标志位为1，或者为0
view:
<% form_tag  :action => "approve",:method=> "post" do %>
<% for student in @students %>
  <tr>
    <td><%= check_box_tag('students[]',student.id,false) %> </td>
  <tr>
<% end %>
<%= submit_tag "approve"%>
<% end %>

controller:
  def approve
    Student.update_all(["status=?", 1], :id => params[:students])
  end