Restricting which MIME types a template will render in Rails

Question

Given:

• A FooController with a bar action
• An ActionView template handler for the custom extension
• A template at app/views/foo/bar.custom

Is there a way to make Rails render that template only for HTML requests without renaming the template to bar.html.custom?

Answer 1

I figured out how to do this using a custom ActionView::Responder. See https://github.com/netzpirat/haml_coffee_assets/issues/80 for details of why this was needed and how I solved it.