Nullsafe attribute in twig component

[ThibaultJlvt]

Hi,

I've just migrated from v2.32.0 to v2.36.0.
Since then, I have some issues with my twig component and more precisely the nullsafe operator :

Before migration :

<twig:Page
    title="Commandes - Affaire : {{ affaire.numero }}"
    breadcrumb="Accueil > <a href='{{ pathIndex }}'>Affaires</a> > {{ lienParent }} {{ lienAffaire }} > Commandes"
    pageTitle="Affaire : {{ affaire.numero ~ ' - ' ~ affaire.commune?.organisation?.raisonSociale ~ ' - ' ~ affaire.libelle }}"
    :menuTabs="menu_tabs"
    :menu="menu"
>

In Page.html.twig :

<h2 class="page-title">
   {{ this.pageTitle }}
</h2>

Was working fine.

But now, if organisation is null, I get : "Impossible to access an attribute ("raisonSociale") on a null variable".

I have to set the variable before :
{% set pageTitle = "Affaire : " ~ affaire.numero ~ ' - ' ~ affaire.commune?.organisation?.raisonSociale ~ ' - ' ~ affaire.libelle %} And then :
:pageTitle="pageTitle"

I've migrated to v3.2.0 to see if there was a little regression that was corrected but no.

Am I missing something ?

Thank you !

Ps : I'm using twig/twig version v3.28.0
and <twig:Page :pageTitle="affaire.commune?.organisation?.raisonSociale" /> not working neither

[Kocal]

Hi, and sorry for the inconvenience.

I don't know why it would fails after your upgrade, but maybe a git bisect between first and last commit of v2.32.0...v2.36.2 could gives you more information.

When you upgraded, only symfony/ux-twig-component was updated?

Thanks!

[Amoifr]

Hi @Kocal! I picked up the bisect question, and plot twist: it is not an ux regression. ComponentNode is byte-identical between v2.32.0 and v2.36.2. The trigger is the Twig upgrade that comes along: ?. landed in Twig 3.23, and its compilation became stateful in 3.24 (twigphp/Twig#4748). The {% component %} tag compiles its props twice, and the second pass loses the null guard. Details and a fix in #3738. Thanks for the pointer, the bisect idea led straight to the right place (just one repo over 😄).