syntax for selecting the last recordset in my model - zend-framework

Question

I tried different possibilities but nothing worked, in the tutorial I couldn't find an example either.
I have a method in my modelclass:
public function getlastImport($filename)
{
//$id = (int) $id;
$rowset = $this->tableGateway->select(['Path' => $filename]);
$row = $rowset->current();
if (! $row) {
throw new RuntimeException(sprintf(
'Could not find row with identifier %d',
$id
));
}
return $row;
}
I want to retrieve the last import of a given filename, so ist must be like in sql:
select max(ID) from table where filename = $filename;
But how would be the right syntax in this case?

Answer 1

The sql query should be
"SELECT * FROM table_name WHERE filename={$filename} ORDER BY id DESC LIMIT 1"
Use as the following in your model
public function getlastImport($filename)
{
$select = $this->tableGateway->getSql()->select();
$select->columns(array('id', 'filename', 'label'));
$select->where(array('filename' => $filename));
$select->order("id DESC");
$select->limit(1);
$result = $this->tableGateway->selectWith($select);
$row = $result->current();
if (! $row) {
throw new RuntimeException(sprintf(
'Could not find row with identifier %d',
$id
));
}
return $row;
}
Hope this would help you!