问如何使redirect_to以远程形式工作？

EN

def action_name
  @foo = Foo.bar

  respond_to do |format|
    if @foo.errors.any?
      format.js
    else
      format.html { redirect_to :index }
    end
  end
end

Your controller action
----------------------
def action_name
  @foo = Foo.bar

  respond_to do |format|
    format.js
  end
end


action.js.erb
----------------

<% if @foo.errors.count > 0 %>
  your modal with errors in it
<% else %>
  window.location.href='<%= url_for(:action => :index) %>'
<% end %>

if @foo.save
  render 'something_new'
else
  flash.now[:error] @foo.errors.map(&:message).join(', ')
  render 'edit' // render the same view with form
end

<% if flash.any? %>
  <div class='modal'>
  ...
    <% flash.each do |key, value| %>
      <div class="flash <%= key %>"><%= value %></div>
    <% end %>
  </div>
<% end %>

$(".modal").modal('show')