Add show action in getting started guide

guides/code/getting_started/app/controllers/posts_controller.rb

@@ -1,12 +1,17 @@
 class PostsController < ApplicationController
 
+
+  def show
+    @post = Post.find(params[:id])
+  end
+
   def new
   end
 
   def create
     @post = Post.new(params[:post])
 
     @post.save
-    redirect_to :action => :index
+    redirect_to :action => :show, :id => @post.id
   end
 end

guides/code/getting_started/app/models/post.rb

@@ -3,7 +3,4 @@ class Post < ActiveRecord::Base
                     :length => { :minimum => 5 }
 
   has_many :comments, :dependent => :destroy
-
-  accepts_nested_attributes_for :tags, :allow_destroy => :true,
-    :reject_if => proc { |attrs| attrs.all? { |k, v| v.blank? } }
 end

guides/code/getting_started/app/views/posts/show.html.erb

@@ -1,26 +1,9 @@
-<p class="notice"><%= notice %></p>
-
 <p>
-  <b>Name:</b>
-  <%= @post.name %>
-</p>
-
-<p>
-  <b>Title:</b>
+  <strong>Title:</strong>
   <%= @post.title %>
 </p>
- 
+
 <p>
-  <b>Content:</b>
-  <%= @post.content %>
+  <strong>Text:</strong>
+  <%= @post.text %>
 </p>
-
-<h2>Comments</h2>
-<%= render @post.comments %>
-
-<h2>Add a comment:</h2>
-<%= render "comments/form" %>
- 
- 
-<%= link_to 'Edit Post', edit_post_path(@post) %> |
-<%= link_to 'Back to Posts', posts_path %> |

guides/code/getting_started/config/routes.rb

@@ -5,6 +5,7 @@
 
   get "posts/new"
   post "posts/create"
+  get "posts/:id" => "posts#show"
 
   # The priority is based upon order of creation:
   # first created -> highest priority.

guides/source/getting_started.textile

@@ -474,7 +474,7 @@ def create
   @post = Post.new(params[:post])
 
   @post.save
-  redirect_to :action => :index
+  redirect_to :action => :show, :id => @post.id
 end
 </ruby>
 
@@ -483,13 +483,63 @@ respective attributes, which are automatically mapped to its
 database columns. In the first line we do just that (remember that
 +params[:post]+ contains the attributes we're interested in). Then,
 +@post.save+ is responsible for saving the model in the database.
-Finally, on the last line we redirect the user to the +index+ action,
+Finally, on the last line we redirect the user to the +show+ action,
 wich we have not defined yet.
 
 TIP: As we'll see later, +@post.save+ returns a boolean indicating
 wherever the model was saved or not, and you can (and usually do) take
 different actions depending on the result of calling +@post.save+.
 
+h4. Showing posts
+
+Before trying to create a new post, let's add the +show+ action, which
+will be responsible for showing our posts. Open +config/routes.rb+
+and add the following route:
+
+<ruby>
+get "posts/:id" => "posts#show"
+</ruby>
+
+The special syntax +:id+ tells rails that this route expects an +:id+
+parameter, which in our case will be the id of the post. Note that this
+time we had to specify the actual mapping, +posts#show+ because
+otherwise Rails would not know which action to render.
+
+As we did before, we need to add the +show+ action in the
++posts_controller+ and its respective view.
+
+<ruby>
+def show
+  @post = Post.find(params[:id])
+end
+</ruby>
+
+A couple of things to note. We use +Post.find+ to find the post we're
+interested in. We also use an instance variable (prefixed by +@+) to
+hold our reference to the post object. We do this because Rails will pass all instance
+variables to the view.
+
+Now, create a new file +app/view/posts/show.html.erb+ with the following
+content:
+
+<erb>
+<p>
+  <strong>Title:</strong>
+  <%= @post.title %>
+</p>
+
+<p>
+  <strong>Text:</strong>
+  <%= @post.text %>
+</p>
+</erb>
+
+Finally, if you now go to
+"http://localhost:3000/posts/new":http://localhost:3000/posts/new you'll
+be able to create a post. Try it!
+
+!images/getting_started/show_action_for_posts.png(Show action for posts)!
+
 h4. Adding a Link
 
 To hook the posts up to the home page you've already created, you can add a link