symfony2 - using multiple connections in a repository or class

Question

I have multiple connections and I have a repository class. I would like the repository class to have access to the multiple connections. Its for a report that requires fetching data from multiple database hosts.

config.yml

doctrine:
    dbal:
        default_connection:  default
        connections:
          default:
              driver:   "%db_default_driver%"
              host:     "%db_default_host%"
              etc..
          bookings:
              driver:   "%db_readonly_bookings_driver%"
              host:     "%db_readonly_bookings_host%"
              etc ...
          sessions:
              etc..

SalesJournalRepistory.php

namespace Portal\SalesJournalBundle\Repository;

use Doctrine\ORM\EntityRepository;

class SalesJournalRepository extends EntityRepository 
{

  public $connDefault   = null;
  public $connBookings  = null;
  public $connSessions  = null;


  function __construct()
  {
    // this is where I get the error
    $this->connDefault  = $this->getManager('default')->getConnection();
    $this->connBookings = $this->getManager('bookings')->getConnection();
    $this->connSessions = $this->getManager('sessions')->getConnection();
  }

  function testQuery(){
     $sql = "SELECT * FROM testTableBookings LIMIT 10";
     $stmt = $this->connBookings->prepare($sql);
     $results = $stmt->fetchAll();

     print_r($results);
  }

  function testQuery2(){
     $sql = "SELECT * FROM testTableSessions LIMIT 10";
     $stmt = $this->connSessions->prepare($sql);
     $results = $stmt->fetchAll();

     print_r($results);
  }


}

I can make it work from the a controller

$connDefault  = $this->getDoctrine()->getManager('default')->getConnection();
$connBookings = $this->getDoctrine()->getManager('bookings')->getConnection();

however im looking to be able to run it from the repository. Im getting the following error

PHP Fatal error:  Call to a member function getConnection() on a non-object

I thought this may give some clue? enjecting entities however I am a little confused and not sure if it is?

Answer 1

An EntityRepository should only be concerned with its owning entity (and manager)- so mixing your Entity Repositories with your Entity Managers really isn't the way to go. I suggest you create yourself a service and inject Doctrine - then you can query whatever you want. For example :

the config

[config.yml / services.yml]
services:
   sales_journal:
      class: Acme\DemoBundle\Service\SalesJournal
       arguments: ['@doctrine']

the service

[Acme\DemoBundle\Service\SalesJournal.php]

namespace Acme\DemoBundle\Service;

public class SalesJournal {

    private $connDefault;
    private $connBookings;
    private $connSessions;


    function __construct($doctrine)
    {
        $this->connDefault = $doctrine->getManager('default')->getConnection();
        $this->connBookings = $doctrine->getManager('bookings')->getConnection();
        $this->connSessions = $doctrine->getManager('sessions')->getConnection();
    }

    function testQuery()
    {
        $sql = "SELECT * FROM testTableBookings LIMIT 10";
        $stmt = $this->connBookings->prepare($sql);
        $results = $stmt->fetchAll();

        print_r($results);
    }

    function testQuery2()
    {
        $sql = "SELECT * FROM testTableSessions LIMIT 10";
        $stmt = $this->connSessions->prepare($sql);
        $results = $stmt->fetchAll();

        print_r($results);
    }
}

then from your controller or where ever you want to use the service you can do :

// get the service
$sales_journal = $this->get('sales_journal');
// call relevent function
$sales_journal->testQuery();