How to use UploadColumn


I installed the plugin, but got stuck rewriting the view, from the
homepage, it says:

If you want the actual file to be sent you need to set the encoding of
the form to multipart. There is a convenient method in UploadColumn
that makes this really easy, instead of your usual form_tag
declaration simply use upload_form_tag.

but how exactly to change it? i m a newbie for ROR.

my partial form looks like this, can someone help me to rewrite it?

<%= error_messages_for :user %>
<% form_for :user do |f| -%>
<p><label for="login">Login</label><br/>
<%= f.text_field :login %></p>

<p><label for="email">Email</label><br/>
<%= f.text_field :email %></p>

<p><label for="password">Password</label><br/>
<%= f.password_field :password %></p>

<p><label for="password_confirmation">Confirm Password</label><br/>
<%= f.password_field :password_confirmation %></p>

    <label for="avatar">Upload A Mugshot:</label>
    <%= f.file_field :avatar %>

<p><%= submit_tag 'Sign up' %></p>
<% end -%>


there is no helper for form_for in UploadColumn yet, it'll be in the
next version, till then you can replace

<% form_for :user do |f| -%>


<% form_for( :user, :html => { :multipart => true }) do |f| %>

that should do the trick, ugly though it is.