REFACTOR: We don't cache the json for the Site model anymore, so let's

rename and remove the methods leftover from that.

app/controllers/application_controller.rb

@@ -215,7 +215,7 @@ class ApplicationController < ActionController::Base
   private
 
     def preload_anonymous_data
-      store_preloaded("site", Site.cached_json(guardian))
+      store_preloaded("site", Site.json_for(guardian))
       store_preloaded("siteSettings", SiteSetting.client_settings_json)
       store_preloaded("customHTML", custom_html_json)
     end

app/models/category.rb

@@ -28,11 +28,9 @@ class Category < ActiveRecord::Base
   validate :parent_category_validator
 
   before_validation :ensure_slug
-  after_save :invalidate_site_cache
   before_save :apply_permissions
   after_create :create_category_definition
   after_create :publish_categories_list
-  after_destroy :invalidate_site_cache
   after_destroy :publish_categories_list
 
   has_one :category_search_data
@@ -221,12 +219,6 @@ SQL
     end
   end
 
-  # Categories are cached in the site json, so the caches need to be
-  # invalidated whenever the category changes.
-  def invalidate_site_cache
-    Site.invalidate_cache
-  end
-
   def publish_categories_list
     MessageBus.publish('/categories', {categories: ActiveModel::ArraySerializer.new(Category.latest).as_json})
   end

app/models/site.rb

@@ -54,12 +54,7 @@ class Site
     Archetype.list.reject { |t| t.id == Archetype.private_message }
   end
 
-  def cache_key
-    k = "site_json_cats_"
-    k << @guardian.secure_category_ids.join("_") if @guardian
-  end
-
-  def self.cached_json(guardian)
+  def self.json_for(guardian)
 
     if guardian.anonymous? && SiteSetting.login_required
       return {
@@ -72,7 +67,4 @@ class Site
     MultiJson.dump(SiteSerializer.new(site, root: false))
   end
 
-  def self.invalidate_cache
-    Discourse.cache.delete_by_family("site")
-  end
 end

spec/models/category_spec.rb

@@ -145,25 +145,6 @@ describe Category do
     end
   end
 
-  describe 'caching' do
-    it "invalidates the site cache on creation" do
-      Site.expects(:invalidate_cache).once
-      Fabricate(:category)
-    end
-
-    it "invalidates the site cache on update" do
-      cat = Fabricate(:category)
-      Site.expects(:invalidate_cache).once
-      cat.update_attributes(name: 'new name')
-    end
-
-    it "invalidates the site cache on destroy" do
-      cat = Fabricate(:category)
-      Site.expects(:invalidate_cache).once
-      cat.destroy
-    end
-  end
-
   describe 'non-english characters' do
     let(:category) { Fabricate(:category, name: "電車男") }