app/views/partials/_blog_post.html.erb

_blog_post.html.erb

<%
  # _counter is defined only if we pass :collection to the partial
  if defined?(blog_post_counter)
    showing_individual_post = false
  else
    showing_individual_post = true
    blog_post_counter = 0
  end
%>
<div id="blog_post_<%= blog_post.id %>" class="blog_post">
  <div class="date"><%= blog_post.published_at.strftime("%B %d, %Y %I:%M%p") %></div>
  
  <h2><%= link_to h(blog_post.name), href = _blog_post_path(blog_post) %></h2>

  <% if blog_post.attachment %>
    <div class="image">
      <%= image_tag blog_post.attachment.file_path %>
    </div>
  <% end %>

  
  <div class="body">
    <% if showing_individual_post or blog_post.summary.blank? %>
      <%= blog_post.body %>
    <% else %>
      <%= blog_post.summary %>
      <p class="read_more">
        <%= link_to 'Read More »', href %>
      </p>
    <% end %>
  </div>
  
  <div class="meta">
    <% unless blog_post.category_id.blank? %>
      Posted in <%= link_to h(blog_post.category_name), _blog_path(blog_post.blog, 'posts_in_category', :category => blog_post.category_name) %>
      <strong>|</strong>
    <% end %>

    <% if blog_post.tags.any? %>
      Tags:
      <span class="tags">
        <%= blog_post.tags.map{|t| link_to(h(t.name), _blog_path(blog_post.blog, 'posts_with_tag', :tag => t.name)) }.join(", ") %>
      </span>
      <strong>|</strong>
    <% end %>
    
    <%#= link_to h(pluralize(blog_post.comments.published.count, "Comment")), "#{_blog_post_path(blog_post)}#comments" %>
  </div>
</div>

blog_template.rb

<% page_title @page_title || @blog.name %>
<h1><%= @page_title || @blog.name %></h1>
<%= render :partial => "partials/blog_post", :collection => @blog_posts %>