.. _changelog:

================
 Change history
================

This document contains change notes for bugfix releases in
the 4.0.x series (0today8), please see :ref:`whatsnew-4.0` for
an overview of what's new in Celery 4.0.


.. _version-4.0.0:

4.0.0
=====
:release-date: 2016-11-04 02:00 P.M PDT
:release-by: Ask Solem

See :ref:`whatsnew-4.0` (in :file:`docs/whatsnew-4.0.rst`).

.. _version-4.0.0rc7:

4.0.0rc7
========
:release-date: 2016-11-02 01:30 P.M PDT

Important notes
---------------

- Database result backend related setting names changed from
  ``sqlalchemy_*`` -> ``database_*``.

    The ``sqlalchemy_`` named settings won't work at all in this
    version so you need to rename them.  This is a last minute change,
    and as they were not supported in 3.1 we will not be providing
    aliases.

- ``chain(A, B, C)`` now works the same way as ``A | B | C``.

    This means calling ``chain()`` might not actually return a chain,
    it can return a group or any other type depending on how the
    workflow can be optimized.