Bonjour,

voici mon configuration technique: ubuntu 12.04 LTS
-version de symfony2.2
J' utilise l'outil de dépendance en php composer pour installer mes librairies.
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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 "require": {
        "php": ">=5.3.3",
        "symfony/symfony": "2.2.*",
        "doctrine/orm": "~2.2,>=2.2.3",
        "doctrine/doctrine-bundle": "1.2.*",
        "twig/extensions": "1.0.*",
        "symfony/assetic-bundle": "2.1.*",
        "symfony/swiftmailer-bundle": "2.2.*",
        "symfony/monolog-bundle": "2.2.*",
        "sensio/distribution-bundle": "2.2.*",
        "sensio/framework-extra-bundle": "2.2.*",
        "sensio/generator-bundle": "2.2.*",
        "jms/security-extra-bundle": "1.4.*",
        "jms/di-extra-bundle": "1.3.*",
		"doctrine/doctrine-fixtures-bundle": "dev-master",
        "doctrine/data-fixtures": "@dev",
		"sonata-project/jquery-bundle":"1.8.*",
        "sonata-project/block-bundle":"2.2.*@dev",
        "sonata-project/admin-bundle": "2.2.*@dev",
		"knplabs/knp-menu-bundle": "1.1.x-dev",
        "simplethings/entity-audit-bundle": "dev-master",
        "sonata-project/intl-bundle": "dev-master",
        "sonata-project/cache-bundle": "dev-master",
		"sonata-project/doctrine-orm-admin-bundle": "2.2.*@dev"
J'arrive à accéder à l'interface admin, toutefois quand je veux accéder au bouton add new pour créer une nouvelle catégorie ou jobs,

An exception has been thrown during the rendering of a template ("Catchable Fatal Error: Method Ens\JobeetBundle\Entity\Category::__toString() must return a string value in /var/www/jobeett.com/ftp/app/cache/dev/classes.php line 8811") in "SonataAdminBundle:CRUD:edit.html.twig".
500 Internal Server Error - Twig_Error_Runtime
1 linked Exception:

ErrorException »

[2/2] Twig_Error_Runtime: An exception has been thrown during the rendering of a template ("Catchable Fatal Error: Method Ens\JobeetBundle\Entity\Category::__toString() must return a string value in /var/www/jobeett.com/ftp/app/cache/dev/classes.php line 8811") in "SonataAdminBundle:CRUD:edit.html.twig". -+
j'ai fait toujours toujours sur google, mais je n'ai pas trouver la solution.

Quelqu'un a t'il une idée comment resoudre ce probléme.