symfony - Doctrine Proxy not found -

i'm trying set symfony cmf doctrine phpcr-odm. unfortunately, whenever want save data sonata admin database, following exception:

compile error: doctrine\common\proxy\abstractproxyfactory::getproxydefinition():     failed opening required      '/applications/xampp/xamppfiles/htdocs/app/cache/dev/doctrine/phpcrproxies/__cg__doctrineodmphpcrdocumentgeneric.php' 

i have initialized repository multiple times , deleted cache too, nothing helped.

does have idea, why file missing? how file being generated?

i found out problem was.

in config file of symfony2, had add following:

doctrine_phpcr:     odm:         auto_generate_proxy_classes: "%kernel.debug%" 

for production environment,you have call php app/console cache:warmup generate proxy classes documents in advance.

it should done minimize work in production environment.