Call model.model_name.name instead of model.class.name to determine responder path.

[undergroundwebdesigns]

ActiveModel supports a #model_name method which returns a class providing information
about the model name, and removes the need to infer this from the class heirarchy.

The default model_name can also be over-ridden, which is especially useful to have
rails treat all sub-classes of an STI base model the same (using the base path) for
view and other related file lookups. This change makes that same over-ride also apply to representer lookups.

See also http://stackoverflow.com/questions/29527156/rails-sti-override-model-name-in-parent-class-for-all-subclasses

[apotonick]

This implies that you have a "Rails model" in your hands, which is a wrong assumption, as many people render and parse arbitrary domain objects!!! We can make the name computation overridable if that helps?

Just letting you know I do not support roar-rails frequently anymore as I'm not interested in Roar and Rails without Trailblazer.

In TRB:

def create
  run Comment::Create, representer: ->(options) { compute representer here, just for you }
end