zend framework 2 tutorial AbstractTableGateway - zend-framework2

Question

I'm very new to Zend Framework and php.
I went through the Zend Framework 2 tutorial and tried to use AbstractTableGateway for querying multiple tables.
But got the following message on the web page:
The table name of the provided select object must match that of the table
Here is part of my code:
class PublicationTable extends AbstractTableGateway
{
protected $table = 'publication';
public function fetchAll()
{
$sql = new Sql($this->adapter);
$select = $sql->select();
$select->from(array('p' => 'publication'))
->join('author','publication_fk=p.publication_pk');
$resultSet = $this->selectWith($select);
return $resultSet;
}
...
}
I'm aware that the variable "protected $table" is a String.
So how can one resolve this?
Thanks for the help!
EC

Answer 1

The from() method takes a table name, not a list of columns. Use columns() to specify the columns that you want. I've never tried from a TableGateway though as if you are doing joins, then TableGateway isn't the best pattern to follow.
If you use the DbAdapater directly, then something like this should work:
use Zend\Db\Sql\Select,
Zend\Db\ResultSet\ResultSet;
$select = new Select;
$select->from('publication')
->join('author', 'publication.publication_pk = author.publication_fk',
array('columnnamefromauthortable1', 'columnnamefromauthortable2'));
$statement = $adapter->createStatement();
$select->prepareStatement($adapter, $statement);
$resultSet = new ResultSet();
$resultSet->initialize($statement->execute());