- dossier = Dossier.find_by(id: champ.value)
- show_text_summary = dossier.present?
- show_warning = !show_text_summary && champ.value.present?
- text_summary = dossier.try(:text_summary)

.dossier-link
  %input.form-control{ name: "champs['#{ champ.id }']",
                       placeholder: "Numéro de dossier",
                       id: "champs_#{ champ.id }",
                       value: champ.value,
                       type: 'number',
                       'autocomplete' => 'off',
                       'data-type' => 'dossier-link' }

  .help-block
    %p.text-info{ style: show_text_summary ? nil : 'display: none;' }
      %span.dossier-text-summary= text_summary

    %p.text-warning{ style: show_warning ? nil : 'display: none;' }
      Ce dossier est inconnu