Question

I know this is a really simple question, but I’ve gone completely blank! I’m reading through the Rails guides and looking at the getting started section. The following code is displaying all comments that belong to the current Post:

<h2>Comments</h2>
<% @post.comments.each do |comment| %>
 <p>
  <b>Commenter:</b>
  <%= comment.commenter %>
 </p>

<p>
<b>Comment:</b>
<%= comment.body %>
</p>
<% end %>

What is the simplest way of linking to each individual comment? For reference the page I am looking at is http://guides.rubyonrails.org/getting_started.html

The models are as follows:

class Post < ActiveRecord::Base
  has_many :comments
end

class Comment < ActiveRecord::Base
  belongs_to :post
end

Answer 1

Rails will try to create route helpers to assist you in this. You can get a full list by running rake routes, but there are good odds that the one you’ll be looking for is named comment_path:

<% @post.comments.each do |comment| %>
  <%= link_to 'Click to view comment', comment_path(comment) %>
<% end %>

For reference, check out the Rails Routing Guide.