protected getConstraintForColumn ( Zend\Db\Metadata\Metadata $metadata, $tableName, $columnName ) : null | Zend\Db\Metadata\Object\ConstraintObject | ||
$metadata | Zend\Db\Metadata\Metadata | |
$tableName | ||
$columnName | ||
return | null | Zend\Db\Metadata\Object\ConstraintObject |