Check if EntryComment is defined and not null

[melroy89]

EntryComment can be null after all during the __invoke. So comment can still be null. Let's update Twig to check for defined and not null, to avoid template errors..

---

100% repeatable now. Eg. https://kbin.melroy.org/m/[email protected]/t/457088/The-entire-staff-of-beloved-game-publisher-Annapurna-Interactive-has/comment (so without any comment ID at the end provided in the URL)

Will give:

{"message":"Uncaught PHP Exception Twig\\Error\\RuntimeError: \"Error rendering \"entry_comment\" component: Expected argument of type \"App\\Entity\\EntryComment\", \"null\" given at property path \"comment\".\" at view.html.twig line 49","context":{"exception":{"class":"Twig\\Error\\RuntimeError","message":"Error rendering \"entry_comment\" component: Expected argument of type \"App\\Entity\\EntryComment\", \"null\" given at property path \"comment\".","code":0,"file":"/var/www/kbin.melroy.org/html/templates/entry/comment/view.html.twig:49","previous": ... }

With error:

---

However, with this patch. You will no longer get this 500 error ⛱️ . And show an error instead:

[melroy89]

Also added an error with a back button in case of an empty/null entry comment...

[melroy89]

Tested and works as expected now.