title: Next/link with slug and id
body: <p>I want show url <code>'/post/[slug]'</code>, but I want get id of item then call <code>api</code> with <code>id</code>.
  I can custom with query: <code>{ slug: 'next-js', id: 123}</code>, This issue, it show <code>url /next-js?id=123</code></p>