ruby-on-rails - How do I set the ID in a link_to tag in haml?

Question

I've tried

= link_to 'foo', :action => 'bar', :id => 'foobar'

But ID only seems to modify the href, resulting in

<a href="controller/foobar/bar">foo</a>

How do I set the ID correctly? Also can someone explain to me why :id is modifying the href just so I can understand what's going on behind the scenes?

Answer 1

你必须放在:action => 'bar'一个哈希里面。

= link_to 'foo', { :action => 'bar' }, :id => 'foobar'

文档中有一个示例，该示例针对您的相同问题举了一个示例：

CSS 的类和 id 很容易生成：

link_to "Articles", articles_path, :id => "news", :class => "article"
# => <a href="/articles" class="article" id="news">Articles</a>

使用较旧的参数样式时要小心，因为需要额外的文字哈希：

link_to "Articles", { :controller => "articles" }, :id => "news", 
    :class => "article"
# => <a href="/articles" class="article" id="news">Articles</a>

离开散列会给出错误的链接：

link_to "WRONG!", :controller => "articles", :id => "news", :class => "article"
# => <a href="/articles/index/news?class=article">WRONG!</a>

这就是为什么你最好使用新的参数样式，为路由加上别名，而不是显式调用控制器和动作。

Answer 2

link_to您可以使用标签传递参数，例如

= link_to "foo", { :controller => "foo", :id => "foobar"}

或者

= link_to "foo", {:action=> "any-action, ":controller => "foo", :id => "foobar"}

在这里你不能使用链接_tag的参数

Answer 3

你可以为此使用路径助手吗？这将取决于您的路线配置是否正确。

例如：

= link_to "foo", foo_path, :id => "foobar"