app/views/posts/_post.html.erb
<%= div_for post do %>
<h2><%= link_to post.title, post_path(post) %></h2>
<p><%= time_ago_in_words(post.published_at) %> ago</p>
<p><%= post.body %></p>
<p>Comments(<%= post.comments_count %>)</p>
<ul>
<% post.tags.each do |tag| %>
<li><%= tag.name %></li>
<% end %>
</ul>
<% end %>