Rails,在单击时更改HTML元素的class属性

时间:2013-10-19 10:40:37

标签: jquery html css ruby-on-rails ruby

我正在实现邮箱系统的视图。我想要收件箱已发送邮箱。因此,我在我的视图中放置了两个链接,例如:

<%= link_to "Inbox", messages_user_path(current_user),:class =>"current", :which_mailbox => "received" %>
<%= link_to "Sentbox", messages_user_path(current_user),:class =>"current", :which_mailbox => "sent" %>

然后我希望我的控制器根据`params [:which_mailbox]获取适当的消息。如:

def fetch_messages
    if params[:which_mailbox] == "received"
      @messages= current_user.received_messages
    else if params[:which_mailbox] == "sent"
      @messages = current_user.sent_messages
    end

    render 'users/messages_page'
end

我希望使用粗体字体设置所选邮箱的样式(即`class =“current”),与其他选项形成对比。

a .current{
    font-weight: bold;    
}

问题是两个选项(收件箱/发件箱)都使用上面的class="current"代码link_to ..。如何激活/停用此课程?没有Javascript可以吗?那只是使用Rails + CSS?

修改 这是生成的HTML:

    <section>
  <a href="/users/1/messages" class="current" which_mailbox="received">Inbox</a>
</section>
<section>
  <a href="/users/1/messages" class="current" which_mailbox="sent">Sent</a>
</section>

我现在意识到没有params[:which_mailbox],我想我应该初始化密钥which_mailbox,建议在哪里做这个?

1 个答案:

答案 0 :(得分:3)

由于您执行完整页面重新加载,因此无需在此处使用javascript。你可以只渲染适当的类。

<%= link_to "Inbox", messages_user_path(current_user, :which_mailbox => "received"),
                    :class => params[:which_mailbox] == 'received' ? 'current' : '' %>

您可以通过将逻辑移动到帮助程序

来稍微干掉此代码
module MailboxesHelper
  def mailbox_link_class(this_mailbox, current)
    this_mailbox == current ? 'current' : ''
  end

  def mailbox_link(label, type)
    link_to label, messages_user_path(current_user, :which_mailbox => type),
                      :class =>mailbox_link_class(type, params[:which_mailbox])
  end
end

<%= mailbox_link 'Inbox', 'received' %>
<%= mailbox_link 'Sentbox', 'sent' %>