Touch page if page version gets updated

Crucial for page caching

app/models/alchemy/page_version.rb

@@ -2,7 +2,7 @@
 
 module Alchemy
   class PageVersion < BaseRecord
-    belongs_to :page, class_name: "Alchemy::Page", inverse_of: :versions
+    belongs_to :page, class_name: "Alchemy::Page", inverse_of: :versions, touch: true
 
     has_many :elements, -> { order(:position) },
       class_name: "Alchemy::Element",

spec/models/alchemy/page_version_spec.rb

@@ -70,6 +70,16 @@
     end
   end
 
+  describe "when saved" do
+    let(:page_version) { build(:alchemy_page_version) }
+    let(:page) { page_version.page }
+
+    it "touches the page" do
+      expect(page).to receive(:touch)
+      page_version.save
+    end
+  end
+
   describe "#public?" do
     subject { page_version.public? }