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2018-01-28
- Added ``OrderingFilter``, which makes it possible to specify
mapping (ordering option -> ORM field) for making more developer
friendly ordering options in the API. An example of such could be
a ``Profile`` model with ``ForeignKey`` relation to ``User`` model. In
case if we want to order by ``email`` field in the ``ProfileViewSet``,
instead of ordering on ``user__email`` we could order just on ``email``.