Fix atom feed for reshares of deleted posts.

Propose for fix #4638

Added Changelog line

Added Specs for testing if the reshared origin post is deleted and therefore not shown in the atom feed

Changelog.md

@@ -20,6 +20,7 @@
 * Fix active user statistics by saving a last seen timestamp for users [#4734](https://github.com/diaspora/diaspora/issues/4734)
 * Render HTML in atom user feed [#4835](https://github.com/diaspora/diaspora/pull/4835)
 * Fix plaintext mode of Mentionable [#4294](https://github.com/diaspora/diaspora/issues/4294)
+* Fixed Atom Feed Error if reshared Post is deleted [#4638] (https://github.com/diaspora/diaspora/issues/4638)
 
 ## Features
 * You can report a single post by clicking the correct icon in the controler section [#4517](https://github.com/diaspora/diaspora/pull/4517)

app/views/users/public.atom.builder

@@ -26,9 +26,8 @@ atom_feed({'xmlns:thr' => 'http://purl.org/syndication/thread/1.0',
     author.tag! 'poco:displayName', @user.name
   end
 
-
   @posts.each do |post|
-    post = post.absolute_root if post.is_a? Reshare
+    post = post.absolute_root unless post.absolute_root.nil? if post.is_a? Reshare
     feed.entry post, :url => "#{@user.url}p/#{post.id}",
       :id => "#{@user.url}p/#{post.id}" do |entry|
 

spec/controllers/users_controller_spec.rb

@@ -53,13 +53,21 @@ describe UsersController do
       get :public, :username => @user.username, :format => :atom
       response.body.should include('a href')
     end
-
+    
     it 'includes reshares in the atom feed' do
       reshare = FactoryGirl.create(:reshare, :author => @user.person)
       get :public, :username => @user.username, :format => :atom
       response.body.should include reshare.root.raw_message
     end
 
+    it 'do not show reshares in atom feed if origin post is deleted' do
+      post = FactoryGirl.create(:status_message, :public => true);
+      reshare = FactoryGirl.create(:reshare, :root => post, :author => @user.person)
+      post.delete
+      get :public, :username => @user.username, :format => :atom
+      response.code.should == '200'
+    end
+
     it 'redirects to a profile page if html is requested' do
       get :public, :username => @user.username
       response.should be_redirect