silverstripe/sapphire — pull request #692 by forsdahl (2012-08-02 13:11:48+00:00)
Title: BUG: augmentSQL always extended on base data class on query finalization

The augmentSQL DataExtension method is always extended on the base data
class of data objects in DataQuery::getFinilisedQuery(). This results
in augmentSQL not being called for extensions that are applied to non-
base data classes when finalizing the query.

For example, if Versioned was applied to class B which extends class A,
which in turn extends DataObject, then augmentSQL would be extended for
class A in DataQuery::getFinilisedQuery(). Since class A doesn't have
the Versioned extension in this example, it would not work for class B.

Fixed this by extending augmentSQL on the actual data class and not
on the base class.