Cannot create index Solr

I'm usings symfony 2.5 and I'm trying to create index of solr with solarium. For this, i had created an index console command. But, i have two problems the first, the script can't recognize the Doctrine's service it's weird because I use it with no problem in my controllers. And the second, it can't create the document. This is my code :

       <?php
       namespace Ads\SolrBundle\Command;

       use Ads\ManagerBundle\Entity\Post as Post;

       use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
       use Symfony\Component\Console\Input\InputInterface;
       use Symfony\Component\Console\Input\InputOption;
       use Symfony\Component\Console\Input\InputArgument;
       use Symfony\Component\Console\Output\OutputInterface;
       use Symfony\Bundle\FrameworkBundle\Controller\Controller;
       use Solarium\QueryType\Select\Result\AbstractDocument;

       class IndexAdsCommand extends ContainerAwareCommand
       {
          /**
           * {@inheritdoc}
          */
          protected function configure()
          {
             $this
                ->setName('solr:index')
                ->setDescription('Indexes Ads in Solr')
            ;
        }

        /**
         * {@inheritdoc}
         */
        protected function execute(InputInterface $input, OutputInterface $output)
        {
            $client = $this->getContainer()->get('solarium.client');
            $doctrine = $this->getContainer()->get('doctrine');

            // get an update query instance
            $update = $client->createUpdate();

            $em = $doctrine->getManager();
            $query = $em->createQuery("SELECT COUNT(p.id) fROM AdsManagerBundle:Post p");
            $nber = $query->getResult();

            // create documents
            $id = 0;
            while($id<$nber)
            {
                $post = $doctrine->getManager()->getRepository('AdsManagerBundle:Post')->find($id);
                try
                {
                    $document = $update->createDocument();
                    $this->updateDocumentFromPost($document, $post);
                    $update->addDocument($document);
                } 
                catch (\Exception $e) {
                    $output->writeln('Exception: '.$e->getMessage().', post '.$post->getId().' non indexe');
                }
                $id++;
            }

            // add the documents and a commit command to the update query
            $update->addCommit();

            // this executes the query and returns the result
            $result = $client->update($update);
            $output->writeln('index réalisé à succes !!');
        }

        private function updateDocumentFromPost(AbstractDocument $document, Post $post)
        {
            $document->setField('id', $post->getId());
            $document->setField('nom', $post->getNom());
            $document->setField('contenu', $post->getContenu());
            $document->setField('categorie', $post->getCategorie());
            $document->setField('region', $post->getRegion());
            $document->setField('ville', $post->getVille());
            $document->setField('code_postal', $post->getCodePostal());
            $document->setField('contenu', $package->getContenu());
        }
    }

my schema.xml :

<?xml version="1.0" encoding="UTF-8" ?>
<schema name="packagist" version="1.4">
 <fields>
   <field name="id" type="string" indexed="true" stored="true" required="true" />
   <field name="nom" type="text_general_rev" indexed="true" stored="true"/>
   <field name="contenu" type="text_general_rev" indexed="true" stored="true"/>
   <field name="categorie" type="text_general_rev" indexed="true" stored="true"/>
   <field name="region" type="text_general_rev" indexed="true" stored="true"/>
   <field name="ville" type="float" indexed="true" stored="true" />
   <field name="code_postal" type="string" indexed="false" stored="true" />
 </fields>


 <uniqueKey>id</uniqueKey>
 <defaultSearchField>text</defaultSearchField>
 <solrQueryParser defaultOperator="OR"/>
   <copyField source="nom" dest="text"/>
   <copyField source="contenu" dest="text"/>
</schema>

Thank you for your answers.