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## app/controllers/users_controller.rb # In your controller parse a "size" parameter class UsersController < ApplicationController def show @user = User.find(params[:id]) @size = params[:size] == 'original' ? 'original' : 'small' respond_to do |format| format.html # show.html.erb format.xml { render :xml => @user } end end end ## app/views/users/show.html.erb # In your view, display the appropriate size, and a link somewhere to the other size. # You need "to_sym" since Paperclip expects a symbol... :original, not 'original' <p> <b>Avatar:</b> <%= image_tag @user.avatar.url(@size.to_sym) %><br> </p> <%= link_to_other_size(@size) %> ## app/helpers/users_helper.rb # Hide your logic for getting the "other size" link in a helper method: module UsersHelper def link_to_other_size(size) case size when 'small' other_size = 'original' else other_size = 'small' end link_to link_name_for_size(other_size), :size => other_size end def link_name_for_size(size) "#{size.capitalize} Size" end end

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