# File lib/paperclip.rb, line 194 def check_for_url_clash(name,url,klass) @names_url ||= {} default_url = url || Attachment.default_options[:url] if @names_url[name] && @names_url[name][:url] == default_url && @names_url[name][:class] != klass && @names_url[name][:url] !~ /:class/ log("Duplicate URL for #{name} with #{default_url}. This will clash with attachment defined in #{@names_url[name][:class]} class") end @names_url[name] = {:url => default_url, :class => klass} end