don't error out if the root of a reshare of a reshare got deleted, fixes #3546

Changelog.md

@@ -1,3 +1,7 @@
+# 0.0.1.2
+
+Fix exception when the root of a reshare of a reshare got deleted [#3546](https://github.com/diaspora/diaspora/issues/3546)
+
 # 0.0.1.1
 
 Fix syntax error in French Javascript pluralization rule.

app/presenters/post_presenter.rb

@@ -63,7 +63,7 @@ class PostPresenter
   end
 
   def root
-    PostPresenter.new(@post.absolute_root, current_user).as_json if @post.respond_to?(:root) && @post.root.present?
+    PostPresenter.new(@post.absolute_root, current_user).as_json if @post.respond_to?(:absolute_root) && @post.absolute_root.present?
   end
 
   def user_like

spec/presenters/post_presenter_spec.rb

@@ -44,6 +44,16 @@ describe PostPresenter do
   end
   
   describe '#root' do
+    it 'does not raise if the absolute_root does not exists' do
+      first_reshare = FactoryGirl.create :reshare
+      first_reshare.root = nil
+      reshare = FactoryGirl.create :reshare, :root => first_reshare
+      
+      expect {
+        PostPresenter.new(reshare).root
+      }.to_not raise_error
+    end
+    
     it 'does not raise if the root does not exists' do
       reshare = FactoryGirl.create:reshare
       reshare.root = nil