= simple_form_for [dorsale, Dorsale::Alexandrie::Attachment.new], as: :attachment, multipart: true do |f|
  = f.hidden_field :attachable_id,   value: attachable.id.to_s
  = f.hidden_field :attachable_type, value: attachable.class.to_s

  .form-group.upload
    .input-group
      .form-control
        = f.file_field :file
        label = t("actions.browse")

      span.input-group-btn
        button.btn.btn-success type="submit"
          = t("actions.upload")