Rendering Extension
The Rendering extension adds render and display helper methods to controllers that reduce common boilerplate when producing rendered representations of media types and setting response “Content-Type” headers.
Controller#render(object, include_nil: false) loads object into the
  the current applicable MediaType (as from Controller#media_type) and
  renders it using the fields provided by Controller#expanded_fields (from the
    FieldExpansion extension).
Controller#display(object, include_nil: false) calls render (above) with
    object, assigns the result to the current response.body, sets the
    response’s “Content-Type” header to the appropriate MediaType identifier,
    and returns the response.
To use this extension, include it in a controller with include Praxis::Extensions::Rendering.