Redirecting to /core/install.php is a great feature for people playing with Drupal as they can quickly understand what's going on.
But on the contrary, it's very bad in production with a (big) database problem ! (Even worse when it falls in the varnish cache hush!)
I was thinking of a configuration key in backoffice, section "Error pages", but since we have no database, it should be a variable in settings.php.
I would like to have the community opinion first ?
=============================
In Drupal\Core\EventSubscriber\ExceptionDetectNeedsInstallSubscriber :
/**
* Handles errors for this subscriber.
*
* @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event
* The event to process.
*/
public function onException(GetResponseForExceptionEvent $event) {
$exception = $event->getException();
if ($this->shouldRedirectToInstaller($exception, $this->connection)) {
// Only redirect if this is an HTML response (i.e., a user trying to view
// the site in a web browser before installing it).
$request = $event->getRequest();
$format = $request->query->get(MainContentViewSubscriber::WRAPPER_FORMAT, $request->getRequestFormat());
if ($format == 'html') {
$event->setResponse(new RedirectResponse($request->getBasePath() . '/core/install.php', 302, ['Cache-Control' => 'no-cache']));
}
}
}
