Use Alchemy::RelatableResource

Alchemy has a relatable resource module that we
include in Spree:Product, Spree::Taxon and Spree::Variant.
Since RelatableResource now also has cache invalidation
built in, we can use that.

Author: tvdeyen

app/patches/models/alchemy/solidus/spree_product_patch.rb

@@ -4,8 +4,6 @@ module Alchemy
   module Solidus
     module SpreeProductPatch
       def self.prepended(base)
-        # Solidus runs touch callbacks on product after_save
-        base.after_touch :touch_alchemy_ingredients
         base.has_many :alchemy_ingredients, class_name: "Alchemy::Ingredients::SpreeProduct", as: :related_object, dependent: :nullify
       end
 
@@ -24,13 +22,9 @@ def touch_taxons
         taxons.each(&:touch)
       end
 
-      # Touch all elements that have this product assigned to one of its ingredients.
-      # This cascades to all parent elements and pages as well.
-      def touch_alchemy_ingredients
-        InvalidateElementsCacheJob.perform_later("SpreeProduct", id)
-      end
-
       ::Spree::Product.prepend self
     end
   end
+
+  ::Spree::Product.include RelatableResource
 end

app/patches/models/alchemy/solidus/spree_taxon_patch.rb

@@ -4,20 +4,11 @@ module Alchemy
   module Solidus
     module SpreeTaxonPatch
       def self.prepended(base)
-        base.after_update :touch_alchemy_ingredients
-        base.after_touch :touch_alchemy_ingredients
         base.has_many :alchemy_ingredients, class_name: "Alchemy::Ingredients::SpreeTaxon", as: :related_object, dependent: :nullify
       end
 
       ::Spree::Taxon.prepend self
-
-      private
-
-      # Touch all elements that have this taxon assigned to one of its ingredients.
-      # This cascades to all parent elements and pages as well.
-      def touch_alchemy_ingredients
-        InvalidateElementsCacheJob.perform_later("SpreeTaxon", id)
-      end
     end
   end
+  ::Spree::Taxon.include RelatableResource
 end

app/patches/models/alchemy/solidus/spree_variant_patch.rb

@@ -4,20 +4,12 @@ module Alchemy
   module Solidus
     module SpreeVariantPatch
       def self.prepended(base)
-        base.after_update :touch_alchemy_ingredients
-        base.after_touch :touch_alchemy_ingredients
         base.has_many :alchemy_ingredients, class_name: "Alchemy::Ingredients::SpreeVariant", as: :related_object, dependent: :nullify
       end
 
       ::Spree::Variant.prepend self
-
-      private
-
-      # Touch all elements that have this variant assigned to one of its ingredients.
-      # This cascades to all parent elements and pages as well.
-      def touch_alchemy_ingredients
-        InvalidateElementsCacheJob.perform_later("SpreeVariant", id)
-      end
     end
   end
+
+  ::Spree::Variant.include RelatableResource
 end