registry_creation.rb

## View Hierarchy

Web::Views::Home::WithPartial
Web::Views::Home::AnotherSubclass < Web::Views::Home::WithPartial

## Add some debug code

# in view/rendering/registry.rb
def initialize(*args)
  puts "Creating registry #{object_id} for #{args}"
  super(*args)
end

def resolve(context)
  puts "resolving with #{object_id} (#{self.class})"
  view, template = @registry.fetch(format(context)) { @registry[DEFAULT_FORMAT] }
  view.new(template, context)
end

# in view/rendering/layout_registry.rb
def resolve(context)
  puts "resolving with #{object_id} (#{self.class})"
  @registry.fetch(format(context)) { NullTemplate.new }
end

# start the server
ruby-2.2.0 partial-test$ RACK_ENV=development puma --threads 4:4 --port 2300 --preload --quiet
Puma starting in single mode...
* Version 2.14.0 (ruby 2.2.0-p0), codename: Fuchsia Friday
* Min threads: 4, max threads: 4
* Environment: development
Creating registry 70346904596500 for [Web::Views::Home::WithPartial]
* Listening on tcp://0.0.0.0:2300
Use Ctrl-C to stop

# make the request to subclass view and observe lines added to the console where server was started
Creating registry 70346905675720 for [Web::Views::Home::AnotherSubclass]
resolving with 70346905675720 (Lotus::View::Rendering::Registry)
resolving with 70346918282200 (Lotus::View::Rendering::LayoutRegistry)