tr.nested-fields
	td
		= f.select :cnae_id,
			options_from_collection_for_select(@cnaes, :id, :codigo_e_descricao, f.object.try(:cnae_id)),
			{ include_blank: "Selecione" },
			class: "form-control s2 col-sm-10"
		= error_for f.object, :cnae

	td
		= f.check_box :principal, style: "margin-left: 40%; -webkit-transform: scale(2);"
		= error_for f.object, :principal

	td
		= link_to_remove_association '<span class="glyphicon glyphicon-trash"></span> Remover'.html_safe, f, class: "btn btn-danger btn-sm icone-anular", disabled: f.object.principal.present?