Autoload resource classes

Implements autoloading on Active Resources classes so they don't load
early unnecessarily. This improves load times for Rails applications,
especially in instances where they are not used.

lib/active_resource/json_errors.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
-require 'active_resource/base'
+require 'active_model/errors'
 
 module ActiveResource
   class Errors < ActiveModel::Errors

lib/shopify_api.rb

@@ -5,40 +5,40 @@
 require 'digest/md5'
 require 'base64'
 require 'active_resource/detailed_log_subscriber'
-require 'shopify_api/limits'
-require 'shopify_api/api_version'
-require 'shopify_api/meta'
 require 'active_resource/json_errors'
-require 'shopify_api/paginated_collection'
-require 'shopify_api/disable_prefix_check'
 
 if Gem::Version.new(RUBY_VERSION) < Gem::Version.new("2.6")
   puts("\nshopify_api: NOTE: Support for Ruby #{RUBY_VERSION} will be dropped in the next major release. Please update to Ruby 2.6 or newer before updating this gem.\n\n")
 end
 
 module ShopifyAPI
+  extend ActiveSupport::Autoload
+
+  require 'shopify_api/limits'
+  require 'shopify_api/api_version'
+  require 'shopify_api/paginated_collection'
+  require 'shopify_api/disable_prefix_check'
+  require 'shopify_api/events'
+  require 'shopify_api/metafields'
+  require 'shopify_api/countable'
+  require 'shopify_api/resources'
+  require 'shopify_api/session'
+  require 'shopify_api/hmac_params'
+  require 'shopify_api/api_access'
+  require 'shopify_api/message_enricher'
+  require 'shopify_api/connection'
+  require 'shopify_api/pagination_link_headers'
+  require 'shopify_api/graphql'
+
+  eager_autoload do
+    autoload(:Meta)
+  end
+
   include Limits
 end
 
-require 'shopify_api/events'
-require 'shopify_api/metafields'
-require 'shopify_api/countable'
-require 'shopify_api/resources'
-require 'shopify_api/session'
-require 'shopify_api/hmac_params'
-require 'shopify_api/api_access'
-require 'shopify_api/message_enricher'
-require 'shopify_api/connection'
-require 'shopify_api/pagination_link_headers'
-require 'shopify_api/graphql'
 require 'shopify_api/graphql/railtie' if defined?(Rails)
 
-if ShopifyAPI::Base.respond_to?(:connection_class)
-  ShopifyAPI::Base.connection_class = ShopifyAPI::Connection
-else
-  require 'active_resource/connection_ext'
-end
-
 if ENV["SHOPIFY_LOG_PATH"]
   ActiveResource::Base.logger = Logger.new(ENV["SHOPIFY_LOG_PATH"])
   ActiveResource::DetailedLogSubscriber.attach_to(:active_resource_detailed)

lib/shopify_api/api_version.rb

@@ -1,4 +1,7 @@
 # frozen_string_literal: true
+
+require "active_support/core_ext/hash"
+
 module ShopifyAPI
   class ApiVersion
     class UnknownVersion < StandardError; end

lib/shopify_api/graphql/railtie.rb

@@ -4,6 +4,8 @@
 module ShopifyAPI
   module GraphQL
     class Railtie < Rails::Railtie
+      config.eager_load_namespaces << ShopifyAPI
+
       initializer 'shopify_api.initialize_graphql_clients' do |app|
         ShopifyAPI::GraphQL.schema_location = app.root.join('db', ShopifyAPI::GraphQL.schema_location)
         ShopifyAPI::GraphQL.initialize_clients

lib/shopify_api/resources.rb

@@ -1,4 +1,98 @@
 # frozen_string_literal: true
-require 'shopify_api/resources/base'
-require 'shopify_api/resources/array_base'
-Dir.glob("#{File.dirname(__FILE__)}/resources/*").each { |file| require(file) }
+
+module ShopifyAPI
+  eager_autoload do
+    autoload_under('resources') do
+      autoload(:Base)
+      autoload(:ArrayBase)
+      autoload(:AbandonedCheckout)
+      autoload(:AccessScope)
+      autoload(:AccessToken)
+      autoload(:Address)
+      autoload(:Announcement)
+      autoload(:ApiPermission)
+      autoload(:ApplicationCharge)
+      autoload(:ApplicationCredit)
+      autoload(:ArrayBase)
+      autoload(:Article)
+      autoload(:Asset)
+      autoload(:AssignedFulfillmentOrder)
+      autoload(:Base)
+      autoload(:BillingAddress)
+      autoload(:Blog)
+      autoload(:CarrierService)
+      autoload(:Cart)
+      autoload(:Checkout)
+      autoload(:Collect)
+      autoload(:Collection)
+      autoload(:CollectionListing)
+      autoload(:CollectionPublication)
+      autoload(:Comment)
+      autoload(:Country)
+      autoload(:Currency)
+      autoload(:CustomCollection)
+      autoload(:Customer)
+      autoload(:CustomerGroup)
+      autoload(:CustomerInvite)
+      autoload(:CustomerSavedSearch)
+      autoload(:DiscountCode)
+      autoload(:DiscountCodeBatch)
+      autoload(:DraftOrder)
+      autoload(:DraftOrderInvoice)
+      autoload(:Event)
+      autoload(:Fulfillment)
+      autoload(:FulfillmentEvent)
+      autoload(:FulfillmentOrder)
+      autoload(:FulfillmentOrderLocationsForMove)
+      autoload(:FulfillmentRequest)
+      autoload(:FulfillmentService)
+      autoload(:FulfillmentV2)
+      autoload(:GiftCard)
+      autoload(:Image)
+      autoload(:InventoryItem)
+      autoload(:InventoryLevel)
+      autoload(:LineItem)
+      autoload(:Location)
+      autoload(:MarketingEvent)
+      autoload(:Metafield)
+      autoload(:NoteAttribute)
+      autoload(:Option)
+      autoload(:Order)
+      autoload(:OrderRisk)
+      autoload(:Page)
+      autoload(:Payment)
+      autoload(:PaymentDetails)
+      autoload(:Policy)
+      autoload(:PriceRule)
+      autoload(:Product)
+      autoload(:ProductListing)
+      autoload(:ProductPublication)
+      autoload(:Province)
+      autoload(:Publication)
+      autoload(:Receipt)
+      autoload(:RecurringApplicationCharge)
+      autoload(:Redirect)
+      autoload(:Refund)
+      autoload(:Report)
+      autoload(:ResourceFeedback)
+      autoload(:Rule)
+      autoload(:ScriptTag)
+      autoload(:ShippingAddress)
+      autoload(:ShippingLine)
+      autoload(:ShippingRate)
+      autoload(:ShippingZone)
+      autoload(:Shop)
+      autoload(:SmartCollection)
+      autoload(:StorefrontAccessToken)
+      autoload(:TaxLine)
+      autoload(:TaxService)
+      autoload(:TenderTransaction)
+      autoload(:Theme)
+      autoload(:Transaction)
+      autoload(:UsageCharge)
+      autoload(:User)
+      autoload(:Variant)
+      autoload(:Webhook)
+    end
+  end
+end

lib/shopify_api/resources/base.rb

@@ -164,3 +164,10 @@ def only_id
     end
   end
 end
+
+
+if ShopifyAPI::Base.respond_to?(:connection_class)
+  ShopifyAPI::Base.connection_class = ShopifyAPI::Connection
+else
+  require 'active_resource/connection_ext'
+end