Zend Framework 2 TableGateway getAdapter needs Interface

Question

Hi I am new to Zend Framework 2 and I am having a problem with this line of code:

$sql = new Sql($this->tableGateway->getAdapter());

If I test this using Phpunit I get the error

Argument 1 passed to Zend\Db\Sql\Sql::__construct() must implement interface 
Zend\Db\Adapter\AdapterInterface, null given, called in C:\xampp\htdocs\zend2

Answer 1

Check if adapter is set.

var_dump(get_class($this->tableGateway->getAdapter()));

Also you how do you declare $this->tableGateway ?