FIX: We missed some references to `/category/xyz` in the ruby code base.

app/models/category.rb

@@ -369,7 +369,7 @@ SQL
   def url
     url = @@url_cache[self.id]
     unless url
-      url = "/category"
+      url = "/c"
       url << "/#{parent_category.slug}" if parent_category_id
       url << "/#{slug}"
       url.freeze

app/views/topics/show.html.erb

@@ -2,7 +2,7 @@
    <%= render_topic_title(@topic_view.topic) %>
 </h2>
 <% if c = @topic_view.topic.category %>
-  <a href="/c/<%= c.slug.blank? ? c.id : c.slug %>"><%= c.name %></a>
+  <%= link_to c.name, c.url %>
 <% end %>
 <hr/>
 

spec/components/topic_query_spec.rb

@@ -84,7 +84,7 @@ describe TopicQuery do
 
       list = TopicQuery.new(moderator, category: diff_category.slug).list_latest
       list.topics.size.should == 1
-      list.preload_key.should == "topic_list_category/different-category/l/latest"
+      list.preload_key.should == "topic_list_c/different-category/l/latest"
 
       # Defaults to no category filter when slug does not exist
       TopicQuery.new(moderator, category: 'made up slug').list_latest.topics.size.should == 2

spec/models/category_spec.rb

@@ -441,7 +441,7 @@ describe Category do
   describe "#url" do
     it "builds a url for normal categories" do
       category = Fabricate(:category, name: "cats")
-      expect(category.url).to eq "/category/cats"
+      expect(category.url).to eq "/c/cats"
     end
 
     describe "for subcategories" do
@@ -449,7 +449,7 @@ describe Category do
         parent_category = Fabricate(:category, name: "parent")
         subcategory = Fabricate(:category, name: "child",
                                 parent_category_id: parent_category.id)
-        expect(subcategory.url).to eq "/category/parent/child"
+        expect(subcategory.url).to eq "/c/parent/child"
       end
     end
   end