Rendering in a table issue: widget is rendered as a div with no structure

Hi,

I have an issue rendering a widget as a row inside a table. It is rendered inside a `div` and it doesn't respect the markup of my render function.

This reminds me of a fix we implemented some months ago. We corrected `get-html-tag` for it to consult Spinneret and return a `:tr` or a `:td` if we are inside a table, and a `:div` otherwise.

I start like this:

```
(defmethod render ((widget book-widget))
(let ((book (book widget)))
(with-html
(:td (bookshops.models:title book))
(:td (bookshops.models:authors book))
(:td (bookshops.models:price book) "€")
(:td (format nil "x ~a" (bookshops.models:quantity book)))
(:td (with-html-form (:POST (lambda (&key &allow-other-keys)
(add-book widget)))
(:input :type "submit"
:title "Add 1 copy to your stock"
:value "+ 1"))))))
```

`add-book` updates the widget:

```
(defun add-book (book-widget)
"Add one copy to the default place."
(let ((book (book book-widget)))
(bookshops.models:add-to *place*
book)
(update book-widget)))
```

I render the table inside my main widget:

```
(:table
(:tbody
(loop for elt in (books widget)
do (with-html
(:tr (render elt))))))))
```

and it displays the table correctly. When I click on the +1 button, a new widget is inserted above the widget that was clicked, inside the `tr`, it is rendered as a div and it doesn't contain any `:td`, only the plain text title + author + price + quantity concatenated.

```
<-- tr of first page load
// the thing appearing after the click:

// the widget that was clicked:
Le langage lisp
Cayrol

```


1. tracing my render function: it is called.

2. logging `get-html-tag` and thus `spinneret:get-html-path`: the path is NIL (??)

3. I tried rendering my widget with an enclosing `:tr`: it doesn't change that the path is NIL and the rendered html as no `td` but all the fields as text.

---

Do you have any pointers or best practices to share?

ps: [code](https://github.com/vindarel/cl-bookshops/blob/master/src/web/blocks.lisp)

Le problème se situe dans la logique de rendu de reblocks lorsqu’un widget est mis à jour à l’intérieur d’un tableau. Examinez la fonction get-html-tag et spinneret:get-html-path pour comprendre pourquoi le chemin vaut NIL. La méthode render de book-widget renvoie des éléments :td, mais après une mise à jour, le widget est rendu comme un div. Vérifiez comment reblocks gère les mises à jour des widgets et le contexte HTML. Le code se trouve dans src/web/blocks.lisp. Testez en ajoutant un widget à un tableau et en cliquant sur le bouton +1.

Rédigé par le modèle d'indexation à partir du texte de l'issue.