1. ## lib/Jizzy/Controller/Categories.pm
2. sub edit {
3.   my $self = shift;
4.  
5.   # Fetch the category id from the parameters
6.   my $id = $self->param('id');
7.  
8.   # Get information from the database about the category
9.   my $result = $self->db->resultset('Category')->find($id);
10.   $self->param('parent_id', $result->parent_id)
11.     unless $self->param('parent_id');
12.  
13.   # Add information in the stash for the template (e.g. edit.html.ep)
14.   $self->stash(id => $result->id);
15.  
16.   # Render the template
17.   $self->render;
18. }
19.  
20. ## templates/categories/edit.html.ep
21. % layout 'admin'
22. % title => 'Jizzy.eu: Edycja Kategorii';
23.  
24. <h2>Category Edit [<%= stash 'id' %>]</h2>
25.  
26. %= form_for 'update_category' => (method => 'POST') => begin
27.   %= include '/categories/_form'
28.   <nav class="is-flex">
29.     %= link_to "Back" => "/categories", class => 'button', style => "flex:1"
30.     %= submit_button 'Update', class => 'button is-primary', style => "flex:1"
31.   </nav>
32. % end
33.  
34. ### templates/categories/_form.html.ep
35. <table class="table is-striped is-fullwidth">
36.   <tr>
37.     <th><%= label_for parent_id => 'Parent:' %></th>
38.         % my $options = category_select
39.     <td>
40.       %= select_field parent_id => $options, class => 'input'
41.     </td>
42.   </tr>
43. </table>