in /project_path/vendor/doctrine/common/lib/Doctrine/Common/Persistence/AbstractManagerRegistry.php at line 199
at ReflectionClass ->__construct ('')
in /project_path/vendor/doctrine/common/lib/Doctrine/Common/Persistence/AbstractManagerRegistry.php at line 199
at AbstractManagerRegistry ->getManagerForClass (null)
in /project_path/vendor/doctrine/doctrine-bundle/Doctrine/Bundle/DoctrineBundle/Registry.php at line 162
at Registry ->getEntityManagerForClass (null)
in /project_path/vendor/sonata-project/doctrine-orm-admin-bundle/Sonata/DoctrineORMAdminBundle/Model/ModelManager.php at line 200
at ModelManager ->getEntityManager (null)
in /project_path/vendor/sonata-project/doctrine-orm-admin-bundle/Sonata/DoctrineORMAdminBundle/Model/ModelManager.php at line 49
at ModelManager ->getMetadata (null)
in /project_path/vendor/sonata-project/doctrine-orm-admin-bundle/Sonata/DoctrineORMAdminBundle/Model/ModelManager.php at line 276
at ModelManager ->getIdentifierFieldNames (null)
in /project_path/vendor/sonata-project/admin-bundle/Sonata/AdminBundle/Form/ChoiceList/ModelChoiceList.php at line 87
at ModelChoiceList ->__construct (object(ModelManager), null, null, null, null)
in /project_path/vendor/sonata-project/admin-bundle/Sonata/AdminBundle/Form/Type/ModelType.php at line 82
at Sonata\AdminBundle\Form\Type\{closure} (object(Options), object(SimpleChoiceList))
in /project_path/vendor/symfony/symfony/src/Symfony/Component/OptionsResolver/Options.php at line 466
at Options ->resolve ('choice_list')
in /project_path/vendor/symfony/symfony/src/Symfony/Component/OptionsResolver/Options.php at line 308
at Options ->all ()
in /project_path/vendor/symfony/symfony/src/Symfony/Component/OptionsResolver/OptionsResolver.php at line 231
at OptionsResolver ->resolve (array('sonata_field_description' => object(FieldDescription), 'class' => null, 'model_manager' => object(ModelManager), 'required' => false, 'expanded' => true, 'multiple' => true, 'label' => 'form.label_groups'))
in /project_path/vendor/symfony/symfony/src/Symfony/Component/Form/ResolvedFormType.php at line 115
at ResolvedFormType ->createBuilder (object(FormFactory), 'groups', array('sonata_field_description' => object(FieldDescription), 'class' => null, 'model_manager' => object(ModelManager), 'required' => false, 'expanded' => true, 'multiple' => true, 'label' => 'form.label_groups'), object(FormBuilder))
in /project_path/vendor/symfony/symfony/src/Symfony/Component/Form/FormFactory.php at line 87
at FormFactory ->createNamedBuilder ('groups', 'sonata_type_model', null, array('sonata_field_description' => object(FieldDescription), 'class' => null, 'model_manager' => object(ModelManager), 'required' => false, 'expanded' => true, 'multiple' => true, 'label' => 'form.label_groups'), object(FormBuilder))
in /project_path/vendor/symfony/symfony/src/Symfony/Component/Form/FormBuilder.php at line 128
at FormBuilder ->create ('groups', 'sonata_type_model', array('sonata_field_description' => object(FieldDescription), 'class' => null, 'model_manager' => object(ModelManager), 'required' => false, 'expanded' => true, 'multiple' => true, 'label' => 'form.label_groups'))
in /project_path/vendor/symfony/symfony/src/Symfony/Component/Form/FormBuilder.php at line 274
at FormBuilder ->resolveChildren ()
in /project_path/vendor/symfony/symfony/src/Symfony/Component/Form/FormBuilder.php at line 210
at FormBuilder ->getForm ()
in /project_path/vendor/sonata-project/admin-bundle/Sonata/AdminBundle/Admin/Admin.php at line 788
at Admin ->buildForm ()
in /project_path/vendor/sonata-project/admin-bundle/Sonata/AdminBundle/Admin/Admin.php at line 1235
at Admin ->getForm ()
in /project_path/vendor/sonata-project/admin-bundle/Sonata/AdminBundle/Controller/CRUDController.php at line 446
at CRUDController ->createAction ()
at call_user_func_array (array(object(CRUDController), 'createAction'), array())
in kernel.root_dir/bootstrap.php.cache at line 1426
at HttpKernel ->handleRaw (object(Request), '1')
in kernel.root_dir/bootstrap.php.cache at line 1390
at HttpKernel ->handle (object(Request), '1', true)
in kernel.root_dir/bootstrap.php.cache at line 1566
at HttpKernel ->handle (object(Request), '1', true)
in kernel.root_dir/bootstrap.php.cache at line 617
at Kernel ->handle (object(Request))
in /project_path/web/app.php at line 24
Secondly, I don't know if this problem is relative :
In admin users list, groups column display something like "Doctrine\Common\Collections\ArrayCollection@000000003d8cf91200000000e4d868a7" instead of user's groups.