UWSGI can't import module 'mysite' with nginx and flask

Question

im updating a project from sf2.6(php5.6) to sf3.4(php7.1)... its going well but now im stuck with an error i cant figure out how to fix it

error output: PHP message: PHP Fatal error: Uncaught Symfony\\Component\\Debug\\Exception\\FatalThrowableError: Type error: Argument 2 passed to Sonata\\FormatterBundle\\Formatter\\Pool::add() must implement interface Sonata\\FormatterBundle\\Formatter\\FormatterInterface, boolean given, called in /var/www/var/cache/dev/ContainerMklcxqq/appDevDebugProjectContainer.php on line 4924 in /var/www/vendor/sonata-project/formatter-bundle/src/Formatter/Pool.php:43\nStack trace:\n#0 /var/www/var/cache/dev/ContainerMklcxqq/appDevDebugProjectContainer.php(4924): Sonata\\FormatterBundle\\Formatter\\Pool->add('twig', true, NULL)\n#1 /var/www/var/cache/dev/ContainerMklcxqq/appDevDebugProjectContainer.php(3475): ContainerMklcxqq\\appDevDebugProjectContainer->getSonata_Formatter_PoolService()\n#2 /var/www/var/cache/dev/ContainerMklcxqq/getAssetic_AssetManagerService.php(8): ContainerMklcxqq\\appDevDebugProjectContainer->getTwigService()\n#3 /var/www/var/cache/dev/ContainerMklcxqq/appDevDebugProjectContainer.php(1349): require('/var/www/var/ca...')\n#4 /v...\n'

if i check the mentioned line (4924) in the container i find:

$instance->add('twig', ${($_ = isset($this- >services['sonata.formatter.text.twigengine']) ? $this- 
>services['sonata.formatter.text.twigengine'] : $this- 
>getSonata_Formatter_Text_TwigengineService()) && false ?: '_'}, NULL);

when i check the actual service with "bin/console debug:container sonata.formatter.text.twigengine" i get the following, which is good, i guess:

Information for Service "sonata.formatter.text.twigengine"
==========================================================

 ---------------- ------------------------------------------------
  Option           Value
 ---------------- ------------------------------------------------
  Service ID       sonata.formatter.text.twigengine
  Class            Sonata\FormatterBundle\Formatter\TwigFormatter
  Tags             sonata.text.formatter
  Public           no
  Synthetic        no
  Lazy             no
  Shared           yes
  Abstract         no
  Autowired        no
  Autoconfigured   no
 ---------------- ------------------------------------------------

and finally i checked the actual TwigFormatter class, which leads to this post:

final class TwigFormatter implements FormatterInterface

how is this error possible and am i supposed to fix this or is any package update needed? im using the newest version of the sonata-project/formatter-bundle and also the newest version of twig/twig.

help and explanation is much appreciated. thanks guys.

Solution

Moving the settings from nginx to uswgi solved my problem:

mysite.ini:

[uwsgi]
vhost=true
socket=/tmp/mysite.sock
venv = /var/www/mysite/venv
chdir = /var/www/mysite
module = app
callable = app

nginx config file:

server {
        listen   80;
        server_name my_ipaddr;

        location /static {
          alias /var/www/mysite/static;
        }

        location / {
              include      uwsgi_params;
              uwsgi_pass   unix:/tmp/mysite.sock;
        }

Comments

[Deer Hunter]

Have you checked your paths? A possibly similar problem was solved here

[Mark Berger]

I'm not able to post an answer right now because I don't have enough reputation, but I solved this by moving the uwsgi settings from nginx to mysite.ini.

[Veve]

You'll have to check all changelogs and upgrade notices of Symfony, and also of sonata and twig.

[netzding]

i fixed all codebase related deprecations before updating - but well, i will take another look then

[Veve]

This bug seems to come from Sonata and Symfony themselves, see github.com/sonata-project/SonataAdminBundle/issues/5238 then github.com/symfony/symfony/issues/28658