Question

So here is what I have:

  def index
    @profiles = Profile.all

    respond_to do |format|
      format.html # index.html.erb
      format.xml  { render :xml => @profiles }
      format.json  { render :json => @profiles }
    end
  end

I would like to add rss, atom and possibly some custom ones such as one that returns the image for the profile.

Answer 1

You can register new ones like this (place this in your config/environment.rb, one of the config/environments/*.rb files or in a file under config/initializers):

Mime::Type.register 'application/pdf', :pdf
Mime::Type.register 'application/vnd.ms-excel', :xls

As for the default ones:

>> Mime::SET.map(&:to_sym)
=> [:all, :text, :html, :js, :css, :ics, :csv, :xml, :rss, :atom, :yaml, :multipart_form, :url_encoded_form, :json, :pdf, :xls]