private function savetags($id, $tags)
{
// transforma objeto de csv para lista
$tag_list = explode(',', $tags);
$tag_list = array_map('trim', $tag_list);
$tag_id_list = [];
// atualiza tabela de tags
foreach ($tag_list as $tag) {
$tag = ltrim($tag);
if ($tag != '') {
$tag_reg = Tag::ofName($tag)->get();
if ($tag_reg->count() == 0) {
$tag_reg = Tag::create(['name' => $tag]);
$tag_id_list[] = $tag_reg->id;
} else {
$tag_id_list[] = $tag_reg[0]->id;
}
}
}
$product = $this->productsmodel->find($id);
$product->tags()->sync($tag_id_list);
}