Trying to get Joint to work with Padrino.

controller.rb

Admin.controllers :backgrounds do
  before do
    authenticated?
  end
  
  get :index do
    @backgrounds = Background.all
    
    render 'backgrounds/index'
  end
  
    post :upload do
      background = Background.create(params[:background])
      
      if background.save
        flash[:notice] = "Your background has been uploaded."
        redirect url(:backgrounds, :index)
      else
        flash[:error] = "Something went wrong and your background was not uploaded."
        redirect url(:backgrounds, :index)
      end
    end
    
    post :activate do
      Background.set({:active => true}, :active => false)
    
      background = Background.find(params[:id])
      background.active = true
      
      if background.save
        flash[:notice] = "The background has been created."
        redirect url(:backgrounds, :index)
      else
        flash[:error] = "The background has not been created."
        redirect url(:backgrounds, :index)
      end
    end
    
    delete :destroy do
      background = Background.find(params[:id])
      
      if background.destroy
        flash[:notice] = "The background hath been destroyed."
        redirect url(:backgrounds, :index)
      else
        flash[:error] = "Something went wrong and the background hath not been destroyed."
        redirect url(:backgrounds, :index)
      end
    end
  
end

index.haml

#inner.row
  = partial 'partials/navigation'
  %section#body
    %h2
      backgrounds
    =flash_tag :notice
    - if !@backgrounds.blank?
      %table
        %thead
          %tr
            %th Name
            %th Link to Media
            %th Actions
        %tbody
          - @backgrounds.each do |background|
            %tr{:class => background.active}
              %td= background.name
              %td= background.media
              %td
                %form.inline{:action => url(:backgrounds, :activate), :method => "post"}
                  %input{:name => "id", :type => "hidden", :value => background.id}/
                  - if !background.active
                    %button.inline{:type => "submit", :value => "Activate"} Activate
                    —
                %form.inline{:action => url(:backgrounds, :destroy), :method => "post"}
                  %input{:name => "id", :type => "hidden", :value => background.id}/
                  %input{:name => "_method", :type => "hidden", :value => "delete"}/
                  %button.inline{:type => "submit", :value => "Delete"} Delete
                      
    - else
      %p
        No backgrounds!
    
    %section.meta.row
      %form{:action => url(:backgrounds, :upload), :method => "post", :enctype => "multipart/form-data"}
        %p
          %input{:name => "background[name]", :placeholder => "Name", :type => "text"}/
        %p
          %input{:name => "background[file]", :type => "file"}/
        %p
          %button.green{:type => "submit"} Create

model.rb

class Background
  include MongoMapper::Document
  plugin Joint
  
  key :name, String
  key :active, Boolean
  
  attachment :file
end

params

{"name"=>"Sea Green", "file"=>{:filename=>"sea-green.jpg", :type=>"image/jpeg", :name=>"background[file]", :tempfile=>#<File:/tmp/RackMultipart20111028-27504-ly71fs>, :head=>"Content-Disposition: form-data; name=\"background[file]\"; filename=\"sea-green.jpg\"\r\nContent-Type: image/jpeg\r\n"}}

stacktrace

=> Padrino/0.10.0 has taken the stage development at http://0.0.0.0:4242
>> Thin web server (v1.2.11 codename Bat-Shit Crazy)
>> Maximum connections set to 1024
>> Listening on 0.0.0.0:4242, CTRL+C to stop
  DEBUG - [29/Oct/2011 14:40:37] "Resolving layout /var/www/fhsclock/admin/views/layouts/application"
  DEBUG - [29/Oct/2011 14:40:37] "GET (0.5119ms) 127.0.0.1 - - /admin/backgrounds HTTP/1.1 - 200 3693"
NoMethodError - undefined method `path' for #<Hash:0xafb66c0>:
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/joint-0.6.0/lib/joint.rb:18:in `name'
 (eval):15:in `file='
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/mongo_mapper-0.9.2/lib/mongo_mapper/plugins/keys.rb:187:in `block in attributes='
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/mongo_mapper-0.9.2/lib/mongo_mapper/plugins/keys.rb:185:in `each_pair'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/mongo_mapper-0.9.2/lib/mongo_mapper/plugins/keys.rb:185:in `attributes='
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/mongo_mapper-0.9.2/lib/mongo_mapper/plugins/keys.rb:215:in `assign'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/mongo_mapper-0.9.2/lib/mongo_mapper/plugins/accessible.rb:19:in `assign'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/mongo_mapper-0.9.2/lib/mongo_mapper/plugins/protected.rb:28:in `assign'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/mongo_mapper-0.9.2/lib/mongo_mapper/plugins/keys.rb:168:in `initialize'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/mongo_mapper-0.9.2/lib/mongo_mapper/plugins/dirty.rb:12:in `initialize'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/mongo_mapper-0.9.2/lib/mongo_mapper/plugins/sci.rb:32:in `initialize'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/mongo_mapper-0.9.2/lib/mongo_mapper/plugins/querying.rb:112:in `new'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/mongo_mapper-0.9.2/lib/mongo_mapper/plugins/querying.rb:112:in `block in initialize_each'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/mongo_mapper-0.9.2/lib/mongo_mapper/plugins/querying.rb:111:in `each'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/mongo_mapper-0.9.2/lib/mongo_mapper/plugins/querying.rb:111:in `initialize_each'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/mongo_mapper-0.9.2/lib/mongo_mapper/plugins/querying.rb:30:in `create'
 /var/www/fhsclock/admin/controllers/backgrounds.rb:13:in `block (2 levels) in <top (required)>'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/application/routing.rb:486:in `call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/application/routing.rb:486:in `block in route'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/sinatra-1.2.7/lib/sinatra/base.rb:736:in `instance_eval'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/sinatra-1.2.7/lib/sinatra/base.rb:736:in `route_eval'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/application/routing.rb:49:in `block (2 levels) in process_destination_path'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/application/routing.rb:49:in `catch'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/application/routing.rb:49:in `block in process_destination_path'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/application/routing.rb:22:in `instance_eval'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/application/routing.rb:22:in `process_destination_path'
 (eval):16:in `block (2 levels) in inject_root_methods'
 (eval):6:in `catch'
 (eval):6:in `block in inject_root_methods'
 (eval):49:in `block in inject_root_methods'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/http_router-0.8.11/lib/http_router/node/root.rb:20:in `[]'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/http_router-0.8.11/lib/http_router.rb:110:in `block in call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/http_router-0.8.11/lib/http_router.rb:110:in `catch'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/http_router-0.8.11/lib/http_router.rb:110:in `call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/application/routing.rb:796:in `route!'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/application/routing.rb:785:in `dispatch!'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/sinatra-1.2.7/lib/sinatra/base.rb:656:in `block in call!'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/sinatra-1.2.7/lib/sinatra/base.rb:820:in `block in invoke'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/sinatra-1.2.7/lib/sinatra/base.rb:820:in `catch'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/sinatra-1.2.7/lib/sinatra/base.rb:820:in `invoke'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/sinatra-1.2.7/lib/sinatra/base.rb:656:in `call!'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/sinatra-1.2.7/lib/sinatra/base.rb:641:in `call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/rack-flash-0.1.2/lib/rack/flash.rb:147:in `call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/reloader.rb:243:in `call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/logger.rb:300:in `call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/sinatra-1.2.7/lib/sinatra/showexceptions.rb:21:in `call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/rack-1.3.5/lib/rack/session/abstract/id.rb:195:in `context'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/rack-1.3.5/lib/rack/session/abstract/id.rb:190:in `call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/rack-1.3.5/lib/rack/head.rb:9:in `call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/sinatra-1.2.7/lib/sinatra/showexceptions.rb:21:in `call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/rack-1.3.5/lib/rack/methodoverride.rb:24:in `call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/sinatra-1.2.7/lib/sinatra/base.rb:1292:in `block in call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/sinatra-1.2.7/lib/sinatra/base.rb:1323:in `synchronize'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/sinatra-1.2.7/lib/sinatra/base.rb:1292:in `call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/router.rb:71:in `block in call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/router.rb:64:in `each'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/router.rb:64:in `call'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/thin-1.2.11/lib/thin/connection.rb:84:in `block in pre_process'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/thin-1.2.11/lib/thin/connection.rb:82:in `catch'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/thin-1.2.11/lib/thin/connection.rb:82:in `pre_process'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/thin-1.2.11/lib/thin/connection.rb:57:in `process'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/thin-1.2.11/lib/thin/connection.rb:42:in `receive_data'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run_machine'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/thin-1.2.11/lib/thin/backends/base.rb:61:in `start'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/thin-1.2.11/lib/thin/server.rb:159:in `start'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/rack-1.3.5/lib/rack/handler/thin.rb:13:in `run'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/rack-1.3.5/lib/rack/server.rb:265:in `start'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/server.rb:44:in `start'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/server.rb:34:in `start'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/server.rb:13:in `run!'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/cli/adapter.rb:7:in `start'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/lib/padrino-core/cli/base.rb:24:in `start'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/thor-0.14.6/lib/thor/task.rb:22:in `run'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/thor-0.14.6/lib/thor/invocation.rb:118:in `invoke_task'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/thor-0.14.6/lib/thor.rb:263:in `dispatch'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/thor-0.14.6/lib/thor/base.rb:389:in `start'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/gems/padrino-core-0.10.0/bin/padrino:9:in `<top (required)>'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/bin/padrino:19:in `load'
 /home/ethan/.rvm/gems/ruby-1.9.2-p290@fhsclock/bin/padrino:19:in `<main>'