added can_edit? helper

app/controllers/posts.rb

@@ -45,7 +45,7 @@ def update
     @post = Post.find_by_id(params[:id])
     raise NotFound unless @post
     if @post.update_attributes(params[:post])
-      redirect url(:post, @post)
+      redirect url(:forum_topic, @topic)
     else
       raise BadRequest
     end

app/helpers/global_helpers.rb

@@ -1,5 +1,8 @@
 module Merb
   module GlobalHelpers
     # helpers defined here available to all views.
+    def can_edit?
+      @post.user_id == current_user.id || is_admin?
+    end
   end
 end

app/views/posts/edit.html.erb

@@ -1,3 +1,6 @@
-<h1>Posts controller, edit action</h1>
-
-<p>Edit this file in <tt>app/views/posts/edit.html.erb</tt></p>
+<% form_for @post, :action => url(:forum_topic_post,@post) do %>
+  <% fieldset :legend => "Edit Post" do %>
+    <p><%= text_area_control :body, :label => "Body" %></p>
+    <p><%= submit_button "Submit" %></p>
+  <% end %>
+<% end %>

app/views/topics/show.html.erb

@@ -15,7 +15,7 @@
           <%= post.user.login %><br />
           <%= post.user.posts.size %> Posts</p>
         </td>
-        <td><%= post.body_html %></td>
+        <td><div><%= link_to "Edit", url(:edit_forum_topic_post,post) if can_edit? %></div><%= post.body_html %></td>
       </tr>
     <% end %>
   </tbody>