Deploy Symfony 4 application but composer has "cache:clear error" - symfony

Question

I try to deploy my Symfony application and when I use composer to install dependencies, I get an error.
I saw that there were people who had the same problem but I didn' t find a solution. Like change in .env APP_ENV=dev to APP_ENV=prod.
Here the logs :
Executing script cache:clear [KO]
[KO]
Script cache:clear returned with error code 255
!! PHP Fatal error: Uncaught Symfony\Component\Debug\Exception\ClassNotFoundException: Attempted to load class "DoctrineFixturesBundle" from namespace "Doctrine\Bundle\FixturesBundle".
!! Did you forget a "use" statement for another namespace? in /tmp/build.YZSXu7Ir2b/src/Kernel.php:23
I use DoctrineFixturesBundle only in dev environment :
"require-dev": {
"doctrine/doctrine-fixtures-bundle": "^3.1",
"fzaninotto/faker": "^1.8",
"symfony/profiler-pack": "^1.0"
}
Here my config/bundles.php :
...
Doctrine\Bundle\FixturesBundle\DoctrineFixturesBundle::class => ['dev' => true, 'test' => true],
...
And here Line 23 of Kernel.php :
...
public function registerBundles(): iterable
{
$contents = require $this->getProjectDir().'/config/bundles.php';
foreach ($contents as $class => $envs) {
if ($envs[$this->environment] ?? $envs['all'] ?? false) {
yield new $class(); // line 23
}
}
}
...

Answer 1

if I understand your problem, you just have Composer Install, but the best is to do that composer install --no-dev --optimize-autoloader it's explained Here. Otherwise, I do not know

Answer 2

Please check if directory "vendor/doctrine/doctrine-fixtures-bundle" exists and if there are files inside - specifically the "vendor/doctrine/doctrine-fixtures-bundle/DoctrineFixturesBundle.php"
If they are not there then it seems you didnt executed "composer update" to add the package. In such case please try:
COMPOSER_MEMORY_LIMIT=-1 composer update doctrine/doctrine-fixtures-bundle
You should see something like:
- Installing doctrine/data-fixtures (v1.3.1): Loading from cache
- Installing doctrine/doctrine-fixtures-bundle (3.2.2): Loading from cache