Using different connections with Doctrine - symfony

Question

My application pulls data from an external database and then stores in the application database after minor processing. How would I set-up the mappings for the external database since it's not tied to entities? This is what I currently have:
dbal:
default_connection: default
types:
json: Sonata\Doctrine\Types\JsonType
connections:
default:
driver: pdo_mysql
host: "%database_host%"
port: "%database_port%"
dbname: "%database_name%"
user: "%database_user%"
password: "%database_password%"
charset: UTF8
rnr:
driver: pdo_mysql
host: "%database_host2%"
port: "%database_port2%"
dbname: "%database_name2%"
user: "%database_user2%"
password: "%database_password2%"
charset: UTF8
orm:
default_entity_manager: default
auto_generate_proxy_classes: "%kernel.debug%"
entity_managers:
default:
connection: default
naming_strategy: doctrine.orm.naming_strategy.underscore
auto_mapping: true
rnr:
connection: rnr
mappings:
AppBundle: ~
With this implementation, I get the error below:
[Doctrine\ORM\ORMException]
Unknown Entity namespace alias 'AppBundle'.
Here's how I implement the function:
protected function execute(InputInterface $input, OutputInterface $output)
{
$em = $this->getContainer()->get('doctrine')->getManager();
$q = $em->createQueryBuilder();
$q->select('t')->from('AppBundle:TransactionSync', 't')->orderBy('t.id', 'DESC')->setMaxResults(1);
$sync = $q->getQuery()->getResult();
$em1 = $this->getContainer()->get('doctrine')->getManager('rnr');
$conn = $em1->getConnection();
$query = "SELECT id, merchant, client, phone, traderTransIdent AS member_id, transaction_id, transaction_type_id, value AS amount, points, DATE_FORMAT(STR_TO_DATE( transaction_date, '%d-%m-%Y' ), '%Y-%m-%d') AS transaction_date FROM merchant_transactions WHERE id > ". $sync->getId();
$stmt = $conn->prepare($query);
$stmt->execute();
$results = $stmt->fetchAll();
if(count($results) > 1)
{
$ts = new TransactionSync();
$ts->setStartTime(new \DateTime());
$id = 0;
foreach($results as $result)
{
$transaction_type = $em->getRepository('AppBundle:TransactionType')->find($result['transaction_type_id']);
$member = $em->getRepository('AppBundle:Member')->find($result['member_id']);
$transaction = new Transaction();
$transaction->setAmount($result['amount']);
$transaction->setPoints($result['points']);
$transaction->setClient($result['client']);
$transaction->setPhone($result['phone']);
$transaction->setTransactionId($result['transaction_id']);
$transaction->setTransactionDate(new \DateTime($result['transaction_date']));
$transaction->setTransactionType($transaction_type);
$transaction->setMember($member);
$em->persist($transaction);
$id = $result['id'];
}
$ts->setLastId($id);
$ts->setRecords(count($results));
$ts->setEndTime(new \DateTime());
$em->persist($ts);
$em->flush();
}
$output->writeln($text);
}

Answer 1

Unfortunately, you cannot use auto_mapping with multiple connections and you cannot map the same Bundle and/or the same alias to different connections. Doctrine is probably looking for AppBundle entities in connection default, completely ignoring rnr; to check all entities known by Doctrine run:
app/console doctrine:mapping:info
and see if your classes are listed correctly.
To workaround your problem, you need to move the TransactionSync entity out of AppBundle. For example, you can create a 'ExtEntity' directory and change your configuration to something like this:
orm:
default_entity_manager: default
auto_generate_proxy_classes: "%kernel.debug%"
entity_managers:
default:
connection: default
naming_strategy: doctrine.orm.naming_strategy.underscore
mappings:
AppBundle: ~
rnr:
connection: rnr
mappings:
ExtEntityMapping:
arbitrary_key:
type: xml # or annotation/yml
dir: %kernel.dir%/../src/AppBundle/ExtEntity
prefix: AppBundle\ExtEntity\
alias: ExtEntity
To avoid some headache, you can also use the method Registry:: getEntityManagerForClass to retrieve the proper ObjectManager for the object.
For example you can do the following in your code:
$registry = $this->getContainer()->get('doctrine');
$transSyncManager = $registry->getEntityManagerForClass('ExtEntity:TransactionSync');
$transTypeManager = $registry->getEntityManagerForClass('AppBundle:TransactionType');
Going off-track, note that you are using prepared statement in a wrong way, which is prone to SQL-injection (maybe not if IDs are always generated by DBMS); use parameters like this:
$query = "SELECT id, merchant, client, phone, traderTransIdent AS member_id, transaction_id, transaction_type_id, value AS amount, points, DATE_FORMAT(STR_TO_DATE( transaction_date, '%d-%m-%Y' ), '%Y-%m-%d') AS transaction_date FROM merchant_transactions WHERE id > :minId";
$stmt = $conn->prepare($query);
$stmt->execute(array('minId' => $sync->getId());
And even better -- if you can modify your database schema -- use DateTime for transaction_date column and avoid the string conversion madness. :)