How to add CarrierWave uploader to Devise registration view? (rails gems) - ruby-on-rails

Question

When users register, I want them to be able to upload an avatar. The new registration .html.erb looks like this:
<h2>Sign up</h2>
<%= form_for(resource, :as => resource_name, :url => registration_path(resource_name), :html => {:multipart => true} ) do |f| %>
<%= devise_error_messages! %>
<div>
<%= f.label :username %><br />
<%= f.text_field :name %>
</div>
<div>
<%= f.label :image %><br />
<%= f.file_field :image %>
</div>
<div><%= f.label :email %><br />
<%= f.email_field :email %></div>
<div><%= f.label :password %><br />
<%= f.password_field :password %></div>
<div><%= f.label :password_confirmation %><br />
<%= f.password_field :password_confirmation %></div>
<div><%= f.submit "Sign up" %></div>
<% end %>
<%= render "links" %>
User.rb:
class User < ActiveRecord::Base
....
mount_uploader :image, ImageUploader
ImageUploader exists...
When I try to visit the view, it tells me that User::ImageUploader doesn't exist. When I try to specify the fully qualified name of the class in the user model, either as an 'include' statement or as an argument to the mount_uploader function, it can't find that either. Do I need to somehow build in a separate form_tag in that view? I'm sure this has been done before. Any help is appreciated.

Answer 1

Have you:
Added an :image column to your User model?
Defined the uploader app/uploaders/image_uploader.rb?
Restarted your server?
You shouldn't need to have this as a separate form tag, as long as the image attribute exists on the User model.
You may need to check your form markup. I notice you have :username on the label and :name on the field.
Try changing:
<%= f.label :username %><br />
<%= f.text_field :name %>
to
<%= f.label :name, "username" %><br />
<%= f.text_field :name %>