Extract serializer helper method to service so the method isn't globally available

app/helpers/serializer_helper.rb

@@ -13,11 +13,4 @@ module SerializerHelper
 
     (serializer_attributes & model_attributes).map { |attr| "#{model.table_name}.#{attr}" }
   end
-
-  # Since Rails 4 has adjusted the way assets paths are handled, we have to access certain
-  # asset-based helpers like this, when outside of a view or controller context.
-  # See: https://stackoverflow.com/a/16609815
-  def image_path(path)
-    ActionController::Base.helpers.image_path(path)
-  end
 end

app/serializers/api/enterprise_shopfront_list_serializer.rb

@@ -1,8 +1,6 @@
 # Represents the minimum details of an Enterprise when all shopfronts are being listed
 module Api
   class EnterpriseShopfrontListSerializer < ActiveModel::Serializer
-    include SerializerHelper
-
     attributes :name, :id, :latitude, :longitude, :is_primary_producer, :is_distributor,
                :path, :icon, :icon_font, :producer_icon_font, :address_id, :sells,
                :permalink
@@ -21,7 +19,7 @@ module Api
         producer_shop: "map_003-producer-shop.svg",
         producer: "map_001-producer-only.svg",
       }
-      image_path icons[enterprise.category]
+      ImagePathService.image_path(icons[enterprise.category])
     end
 
     def icon_font

app/services/image_path_service.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+class ImagePathService
+  # Since Rails 4 has adjusted the way assets paths are handled, we have to access certain
+  # asset-based helpers like this when outside of a view or controller context.
+  # See: https://stackoverflow.com/a/16609815
+  def self.image_path(path)
+    ActionController::Base.helpers.image_path(path)
+  end
+end