- pj = champ.piece_justificative_file

- if !pj.attached?
  = file_field_tag "champs['#{champ.id}']",
    id: "champs_#{champ.id}",
    direct_upload: true,
    mandatory: champ.mandatory?
- else
  %a{ href: url_for(pj), target: '_blank' }
    = pj.filename.to_s
  %br
  Modifier :
  = file_field_tag "champs['#{champ.id}']",
    id: "champs_#{champ.id}",
    direct_upload: true