More sidebar module fixes.

There was some problems with the approach in the previous commits.

- render_collection (render @sidebar_modules in our case) requires
that all objects return the same partial path. Ours may not do that,
so we wrote our own `render_sidebar_modules`-helper.

- The way render_partial finds the correct path to the partial is
to append what's returned by to_partial_path with whatever root
the parent view is in. That would require duplication of the partials
under all the different engines namespaces. Our `render_sidebar_modules`
does it differently, and just looks up the partial according to the
root namespace. This means the sidebar_module code can move back under
the root application so we don't mess up the refinery namespaces.

- Finally found the proper way to link to a blog_post so that it
works from all namespaces. The correct way is:

    refinery.blog_post_path(post)

This works in views (and presumably helpers,) but not in controllers
which is why we struggled with it before.

6 files changed, 17 insertions, 10 deletions

diff --git a/app/helpers/sidebar_helper.rb b/app/helpers/sidebar_helper.rb
new file mode 100644
index 0000000..2ae3e95
--- /dev/null
+++ b/app/helpers/sidebar_helper.rb
@@ -0,0 +1,7 @@
+module SidebarHelper
+  def render_sidebar_modules(mods)
+    mods.map { |m|
+      render m.to_partial_path, :sidebar_module => m
+    }.join().html_safe
+  end
+end
diff --git a/app/views/common/_left_sidebar.html.erb b/app/views/common/_left_sidebar.html.erb
index 1a55f7e..3cdbe0c 100644
--- a/app/views/common/_left_sidebar.html.erb
+++ b/app/views/common/_left_sidebar.html.erb
@@ -1,3 +1,3 @@
 <div id="left_sidebar">
-  <%= render @sidebar_modules.select {|m| m.position == 1} %>
+  <%= render_sidebar_modules @sidebar_modules.select {|m| m.position == 1} %>
 </div>
diff --git a/app/views/common/_right_sidebar.html.erb b/app/views/common/_right_sidebar.html.erb
index 9a40a11..082e4f1 100644
--- a/app/views/common/_right_sidebar.html.erb
+++ b/app/views/common/_right_sidebar.html.erb
@@ -1,3 +1,3 @@
 <div id="right_sidebar">
-  <%= render @sidebar_modules.select {|m| m.position == 2} %>
+  <%= render_sidebar_modules @sidebar_modules.select {|m| m.position == 2} %>
 </div>
diff --git a/app/views/refinery/sidebar_modules/_sidebar_blog_category.html.erb b/app/views/refinery/sidebar_modules/_sidebar_blog_category.html.erb
deleted file mode 100644
index c1d80f1..0000000
--- a/app/views/refinery/sidebar_modules/_sidebar_blog_category.html.erb
+++ /dev/null
@@ -1,8 +0,0 @@
-<% content_for "sidebar_module_#{sidebar_blog_category.title}_body" do %>
-  <% sidebar_blog_category.body.each do |post| %>
-    <%= content_tag :div, :class => :sidebar_blog_headline do %>
-      <%= link_to post.title, blog_post_path(post) %>
-    <% end %>
-  <% end %>
-<% end %>
-<%= render 'common/sidebar_module', :sidebar_module => sidebar_blog_category %>
diff --git a/app/views/sidebar_modules/_sidebar_blog_category.html.erb b/app/views/sidebar_modules/_sidebar_blog_category.html.erb
new file mode 100644
index 0000000..53556e7
--- /dev/null
+++ b/app/views/sidebar_modules/_sidebar_blog_category.html.erb
@@ -0,0 +1,8 @@
+<% content_for "sidebar_module_#{sidebar_module.title}_body" do %>
+  <% sidebar_module.body.each do |post| %>
+    <%= content_tag :div, :class => :sidebar_blog_headline do %>
+      <%= link_to post.title, refinery.blog_post_path(post) %>
+    <% end %>
+  <% end %>
+<% end %>
+<%= render 'sidebar_modules/sidebar_module', :sidebar_module => sidebar_module %>
diff --git a/app/views/common/_sidebar_module.html.erb b/app/views/sidebar_modules/_sidebar_module.html.erb
index c7a24e9..c7a24e9 100644
--- a/app/views/common/_sidebar_module.html.erb
+++ b/app/views/sidebar_modules/_sidebar_module.html.erb