Temporary/demonstration caching behaviour, INCOMPLETE

app/models/enterprise.rb

@@ -7,7 +7,7 @@ class Enterprise < ActiveRecord::Base
   has_many :producer_properties, foreign_key: 'producer_id'
   has_many :supplied_products, :class_name => 'Spree::Product', :foreign_key => 'supplier_id', :dependent => :destroy
   has_many :distributed_orders, :class_name => 'Spree::Order', :foreign_key => 'distributor_id'
-  belongs_to :address, :class_name => 'Spree::Address'
+  belongs_to :address, :class_name => 'Spree::Address', touch: true
   has_many :product_distributions, :foreign_key => 'distributor_id', :dependent => :destroy
   has_many :distributed_products, :through => :product_distributions, :source => :product
   has_many :enterprise_fees

app/models/enterprise_relationship.rb

@@ -1,6 +1,6 @@
 class EnterpriseRelationship < ActiveRecord::Base
-  belongs_to :parent, class_name: 'Enterprise'
-  belongs_to :child, class_name: 'Enterprise'
+  belongs_to :parent, class_name: 'Enterprise', touch: true
+  belongs_to :child, class_name: 'Enterprise', touch: true
 
   validates_presence_of :parent_id, :child_id
   validates_uniqueness_of :child_id, scope: :parent_id, message: "^That relationship is already established."

app/models/spree/classification_decorator.rb

@@ -1,4 +1,6 @@
 Spree::Classification.class_eval do
+  belongs_to :product, :class_name => "Spree::Product", touch: true
+  belongs_to :taxon, :class_name => "Spree::Taxon", touch: true
   before_destroy :dont_destroy_if_primary_taxon
 
   def dont_destroy_if_primary_taxon

app/models/spree/product_decorator.rb

@@ -4,8 +4,8 @@ Spree::Product.class_eval do
   # https://github.com/rails/rails/issues/7618
   has_many :option_types, :through => :product_option_types, :dependent => :destroy
 
-  belongs_to :supplier, :class_name => 'Enterprise'
-  belongs_to :primary_taxon, class_name: 'Spree::Taxon'
+  belongs_to :supplier, :class_name => 'Enterprise', touch: true
+  belongs_to :primary_taxon, class_name: 'Spree::Taxon', touch: true
 
   has_many :product_distributions, :dependent => :destroy
   has_many :distributors, :through => :product_distributions

app/serializers/api/address_serializer.rb

@@ -1,4 +1,7 @@
 class Api::AddressSerializer < ActiveModel::Serializer
+  cached
+  delegate :cache_key, to: :object
+
   attributes :id, :zipcode, :city, :state 
 
   def state

app/serializers/api/enterprise_serializer.rb

@@ -1,9 +1,58 @@
 class Api::EnterpriseSerializer < ActiveModel::Serializer
+  # To improve this: http://hawkins.io/2013/06/caching_object_graphs_with_active_model_serializers/
+  #
+  # Taxons: 
+  #   classifications touch products
+  #   products touch suppliers
+  #   Taxon could change but unlikely: if becomes a problem dereference
+  #
+  # Relatives:
+  #   Enterprise_relationships touches parent, child
+  #   Otherwise dereferencing makes easy
+  #
+  # Address:
+  #   Fine
+  #
+  # Shipping Methods:
+  #   Create distributors_shipping_methods class
+  #   Set up touches
+  
+  def serializable_hash
+    cached_serializer_hash.merge uncached_serializer_hash
+  end
+
+  private
+  
+  def cached_serializer_hash
+    Api::CachedEnterpriseSerializer.new(object, @options).serializable_hash
+  end
+
+  def uncached_serializer_hash
+    Api::UncachedEnterpriseSerializer.new(object, @options).serializable_hash
+  end
+end
+
+class Api::UncachedEnterpriseSerializer < ActiveModel::Serializer
+  attributes :orders_close_at, :active
+
+  def orders_close_at
+    OrderCycle.first_closing_for(object).andand.orders_close_at
+  end
+
+  def active
+    @options[:active_distributors].andand.include?(object)
+  end
+end
+
+class Api::CachedEnterpriseSerializer < ActiveModel::Serializer
+  cached
+  delegate :cache_key, to: :object
+
   attributes :name, :id, :description, :latitude, :longitude, 
     :long_description, :website, :instagram, :linkedin, :twitter, 
     :facebook, :is_primary_producer, :is_distributor, :phone, :visible,
     :email, :hash, :logo, :promo_image, :icon, :path,
-    :pickup, :delivery, :active, :orders_close_at
+    :pickup, :delivery
 
   has_many :distributed_taxons, key: :taxons, serializer: Api::TaxonSerializer
   has_many :supplied_taxons, serializer: Api::TaxonSerializer
@@ -20,14 +69,6 @@ class Api::EnterpriseSerializer < ActiveModel::Serializer
     object.shipping_methods.where(:require_ship_address => true).present?
   end
 
-  def active
-    @options[:active_distributors].andand.include?(object)
-  end
-
-  def orders_close_at
-    OrderCycle.first_closing_for(object).andand.orders_close_at
-  end
-
   def email
     object.email.to_s.reverse
   end

app/serializers/api/taxon_serializer.rb

@@ -1,4 +1,7 @@
 class Api::TaxonSerializer < ActiveModel::Serializer
+  cached
+  delegate :cache_key, to: :object
+
   attributes :id, :name, :permalink, :icon
 
   def icon

config/environments/development.rb

@@ -5,6 +5,7 @@ Openfoodnetwork::Application.configure do
   # every request.  This slows down response time but is perfect for development
   # since you don't have to restart the web server when you make code changes.
   config.cache_classes = false
+  config.cache_store = :memory_store
 
   # Log error messages when you accidentally call methods on nil.
   config.whiny_nils = true