<%= link_to "Improve Your Ruby Skills", book_path(@book) %>### app/helpers/application_helper.rb ###
module ApplicationHelper
def my_link_to(text, href)
"<a href='#{href}'>#{text}</a>".html_safe
end
end<!-- app/views/posts/index.html.erb -->
<html>
<body>
<div class="posts">
<% @posts.each do |post| %>
<!-- use `@posts` instead of `posts` -->
<div class="post">
<h2 class="title">
<%= link_to post.title, post_path(post.id) %>
</h2>
<small class="meta">
<span class="author">by <%= post.author %> -</span>
<em class="created_at"><%= post.created_at %></em>
<%= link_to 'Edit', edit_post_path(post.id) %>
<form method="post" action="/posts/<%= post.id %>" style='display: inline'>
<input type="submit" value="Delete" />
</form>
</small>
</div>
<hr />
<% end %>
</div>
<%= link_to 'New Post', new_post_path %>
</body>
</html><!-- app/views/posts/show.html.erb -->
<!-- ... -->
<div class="post">
<!-- ... -->
</div>
<%= my_link_to 'Back to Posts', posts_path %>
<!-- generates... -->
<!-- <a href="/posts">Back to Posts</a> -->