Help getting names in view for attachments in Rails

I want to display attachments in my asset view and I have this in my view:

<% if @asset.attachments.size > 0 %开发者_如何学C>
    <% @asset.attachments.each_with_index do |attachment| %>
    <%= image_tag attachment.to_s %>  
    <%end%>
    <%end%>

and I have this in my controller (just the basic):

 def show
@asset = Asset.find(params[:id])

respond_to do |format|
  format.html # show.html.erb
  format.xml  { render :xml => @asset }
end

end

When I want it to show the name (which is in the attachment field of the attachments table). But the code only gives me

 #<attachment #<attachment

as output in the view. What am I missing?

---

Calling attachment here is just referencing the class it looks like. Is there a name field for attachment so you could call something like <%= image_tag attachment.name %>?