= f.fields_for :types_de_piece_justificative, types_de_piece_justificative do |ff|
  .form-inline
    .form-group
      %h4 Libellé
      =ff.text_field :libelle, class: 'form-control libelle', placeholder: 'Libellé'

    .form-group
      %h4 Description
      =ff.text_area :description, class: 'form-control description', placeholder: 'Description'

    -if ff.object.id.nil?
      .form-group#add_type_de_piece_justificative_button
        %br  
        = f.submit('Ajouter la pièce')