I'm trying to get Valums uploader to work with my rails project and having a lot of difficulty. 

I currently have a really simple upload process with Paperclip using the standard model and view...
**Model**

```
class User
  include Mongoid::Document
  include Mongoid::Paperclip

  has_mongoid_attached_file :image

```

**Controller**

```
  def avatar
    @user = current_user
    respond_to do |format|
      format.html
    end
  end
  #working on the updateimage method
    def update
      file = params[:qqfile].is_a?(ActionDispatch::Http::UploadedFile) ? params[:qqfile] : params[:file]
        @user = current_user
        if @user.update_attributes(params[:user])
            render :text => '{"success": true}', :content_type => "application/json"
       else
            render :text => @user.errors.to_json, :content_type => "application/json"
       end
     end

```

**View**

```
= form_for(@user, :as => @user, :url => '/updateimage', :html => { :method => :post, :multipart => true }) do |f|
    #file-uploader
    =@user.firstname
    %img{:src => current_user.image}
    = f.file_field :image
    = f.submit

```

*Soooooo...* this all works, but when I try to use Valums jQuery:

```
  $('#file-uploader').fineUploader({
    debug: true,
    autoSubmit: true,
    allowedExtensions: ['jpg', 'jpeg', 'png', 'gif'],
    sizeLimit: 1048576, // max size: 1MB
    minSizeLimit: 0, // min size
    multiple: false,
    request: {
        endpoint: '/updateimage',
        paramsInBody: true
        }
    });

```

I get this:

```
undefined method `update_attributes' for nil:NilClass

```

I'd love to get this working, but I'm a little new to programming in general, so it's still quite an abstract thing for me. I'm happy to provide additional log info, just tell me where to find it.

**Routes**

```
             admin_index GET    /admin(.:format)                       admin#index
                         POST   /admin(.:format)                       admin#create
               new_admin GET    /admin/new(.:format)                   admin#new
              edit_admin GET    /admin/:id/edit(.:format)              admin#edit
                   admin GET    /admin/:id(.:format)                   admin#show
                         PUT    /admin/:id(.:format)                   admin#update
                         DELETE /admin/:id(.:format)                   admin#destroy
                  orders GET    /orders(.:format)                      orders#index
                         POST   /orders(.:format)                      orders#create
               new_order GET    /orders/new(.:format)                  orders#new
              edit_order GET    /orders/:id/edit(.:format)             orders#edit
                   order GET    /orders/:id(.:format)                  orders#show
                         PUT    /orders/:id(.:format)                  orders#update
                         DELETE /orders/:id(.:format)                  orders#destroy
                 entries GET    /entries(.:format)                     entries#index
                         POST   /entries(.:format)                     entries#create
               new_entry GET    /entries/new(.:format)                 entries#new
              edit_entry GET    /entries/:id/edit(.:format)            entries#edit
                   entry GET    /entries/:id(.:format)                 entries#show
                         PUT    /entries/:id(.:format)                 entries#update
                         DELETE /entries/:id(.:format)                 entries#destroy
              home_index GET    /home(.:format)                        home#index
                         POST   /home(.:format)                        home#create
                new_home GET    /home/new(.:format)                    home#new
               edit_home GET    /home/:id/edit(.:format)               home#edit
                    home GET    /home/:id(.:format)                    home#show
                         PUT    /home/:id(.:format)                    home#update
                         DELETE /home/:id(.:format)                    home#destroy
                  avatar        /avatar(.:format)                      home#avatar
             updateimage POST   /updateimage(.:format)                 home#update
                    root        /                                      home#home
                    root        /                                      home#index
        new_user_session GET    /users/sign_in(.:format)               devise/sessions#new
            user_session POST   /users/sign_in(.:format)               devise/sessions#create
    destroy_user_session DELETE /users/sign_out(.:format)              devise/sessions#destroy
 user_omniauth_authorize        /users/auth/:provider(.:format)        users/omniauth_callbacks#passthru {:provider=>/facebook/}
  user_omniauth_callback        /users/auth/:action/callback(.:format) users/omniauth_callbacks#(?-mix:facebook)
           user_password POST   /users/password(.:format)              devise/passwords#create
       new_user_password GET    /users/password/new(.:format)          devise/passwords#new
      edit_user_password GET    /users/password/edit(.:format)         devise/passwords#edit
                         PUT    /users/password(.:format)              devise/passwords#update
cancel_user_registration GET    /users/cancel(.:format)                users/registrations#cancel
       user_registration POST   /users(.:format)                       users/registrations#create
   new_user_registration GET    /users/sign_up(.:format)               users/registrations#new
  edit_user_registration GET    /users/edit(.:format)                  users/registrations#edit
                         PUT    /users(.:format)                       users/registrations#update
                         DELETE /users(.:format)                       users/registrations#destroy
       user_confirmation POST   /users/confirmation(.:format)          devise/confirmations#create
   new_user_confirmation GET    /users/confirmation/new(.:format)      devise/confirmations#new
                         GET    /users/confirmation(.:format)          devise/confirmations#show
                    user GET    /users/:id(.:format)                   users#show

```