photomix/app/views/photos/edit.html.erb

<h1>Edit Photo</h1>

<%= image_tag @photo.file.preview.url %>
 
<%= form_for @photo do |f| %>
<%= hidden_field_tag :collection_id, params[:collection_id] %>
<%= hidden_field_tag :album_id, params[:album_id] %>
  <%= f.error_messages %>
  <%= render :partial => "form", :object => f %>
  <%= f.submit "Update" %>
<% end %>

<% content_for :action_links do %>
<%= link_to("Delete photo", { :action => "destroy", :id => @photo, :collection_id => params[:collection_id] },
  :confirm => "Are you sure you want to delete this photo?",
  :method => :delete) %>
<% end %>