How To Access to Global Confin within Model Class in ZF2

Question

I want to have access to database config set in global config file within my model. In ZF2 controllers we can load configs using getServiceLocator method, but how can i do this in my Model class ? here is my Model class:

class BaseModel extends AbstractTableGateway
{
    public function __construct()
    {
        $this->adapter = new Adapter(array(
            'driver' => 'Pdo_Mysql',
            'database' => 'mydbname',
            'username' => 'root',
            'password' => 'root'
        ));
    }
}

I just want to load 'db' array config ( located in global config file) and replace with this input array as a Adapter class input parameters.

Here is my global config file:

return array(

    "db" => array(
        "driver" => "Pdo_Mysql",
        "dsn" => "mysql:dbname=mydbname;host=localhost",
        "username" => "root",
        "password" => "root"
    ),

    "service_manager" => array(
        "factories" => array(
            "dbFactory" => "Zend\Db\Adapter\AdapterServiceFactory",
        )
    )

);

Answer 1

If you need to modify the DbAdapter config (the database you are connecting to) you'll need to create a different instance of the adapter and then inject the adapter that into your 'model'

class FooModel extends AbstractTableGateway
{
    public function __construct($dbAdapter)
    {
        $this->adapter = $adapter;
    }
}

Then create the adapter service factories

public function getServiceConfig()
{
   return array(
       'factories' => array(

           // Standard database adapter
           'dbAdapter1' => function($sm) {
              $config = $sm->get('config');
              return new \Zend\Db\Adapter\Adapter($config['db']);
           }, 
           // Another db adapter using different config
           'dbAdapter2' => function($sm) {
              $config = $sm->get('config');
              return new \Zend\Db\Adapter\Adapter($config['db2']);
           }, 

           // The model that requires a different database
           // adapter to be injected
           'FooModel' => function($sm) {
              $adapter = $sm->get('dbAdapter2');
              return new Model\FooModel($adapter);
           }, 

       ),
   );
}

You can then add all the config to the db2 key in either global or module.config.php .