Multiple DB connections in ZF3 - database

Question

When I was using ZF1, I had an ini file with db connection information (i.e. mysql, pgsql, mssql, etc...)
modulename.adapter = PDO_MYSQL
modulename.params.host = xxx.xxx.x.xx
modulename.params.username = username
modulename.params.password = password
modulename.params.dbname = databasename
and in my model, I would extends Zend_Db_Table and do the following in my
public function _construct() {
$dbconfig = Zend_Registry::get('dbProfiles');
$this->db = Zend_Db::factory($dbconfig->modulename->adapter,
$dbconfig->modulename->params);
}
in some function, I have the following code
$sql = "SELECT * FROM Table";
$result = $this->db->query($sql);
while($row =$result->fetch()) {
//... do something
}
How can I do something similar to this in ZF3? Connecting multiple database types, querying different tables, and fetching my results?
Thank you.

Answer 1

In your configuration set as many database adapters as you have databases:
'db' => [
'adapters' => [
'Application\Db\Db1Adapter' => [
'driver' => 'Pdo_Mysql',
'Dsn' => 'mysql:dbname=Your_db_1_name;host=your_host;charset=utf8',
'password' => 'your_password',
'username' => 'your_username',
],
'Application\Db\Db2Adapter' => [
'driver' => 'Pdo_Mysql',
'Dsn' => 'mysql:dbname=Your_db_2_name;host=your_host;charset=utf8',
'password' => 'your_password',
'username' => 'your_username',
]
]
],
Then call the adapter in service manager factories to create tablegateway or just pass the adapter to the controller:
use \Application\Db\Db1Adapter;
...
$db1Adapter = $container->get(Db1Adapter::class);
...