render_for_api_application

# File actionpack/lib/action_dispatch/middleware/debug_exceptions.rb, line 95
    def render_for_api_application(request, wrapper)
      body = {
        status: wrapper.status_code,
        error:  Rack::Utils::HTTP_STATUS_CODES.fetch(
          wrapper.status_code,
          Rack::Utils::HTTP_STATUS_CODES[500]
        ),
        exception: wrapper.exception.inspect,
        traces: wrapper.traces
      }

      content_type = request.formats.first
      to_format = "to_#{content_type.to_sym}"

      if content_type && body.respond_to?(to_format)
        formatted_body = body.public_send(to_format)
        format = content_type
      else
        formatted_body = body.to_json
        format = Mime[:json]
      end

      render(wrapper.status_code, formatted_body, format)
    end