doc/changes/3.23.rst
author Jérémy Bobbio <jeremy.bobbio@irq7.fr>
Wed, 05 Jun 2019 15:38:29 +0200
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[pkg] Switch all Debian packages to Python 3
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3.23 (24 June 2016)
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===================
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New features
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------------
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* Python 3.x support in CubicWeb itself is now complete, except for the
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  twisted package (since Twisted does not completely support Python 3.x
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  itself). The skeleton for new cube should also be Python 3 compatible, in
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  particular its `setup.py` got updated.
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* The `source-sync` command can now synchronize all sources in the database,
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  if no `<source>` argument is provided.
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* Datafeed source synchronization is now asynchronous when requested from user
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  interface.
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Database handling
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~~~~~~~~~~~~~~~~~
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* Most indexes and constraints will be rebuilt during the migration, because
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  they are now named after a md5 hash to control the name's size.
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* Index are renamed upon renaming of an entity type, so they are still
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  correctly tracked.
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* A new `db-check-index` command is added to `cubicweb-ctl`, to display the
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  differences between the indexes in the database and those expected by the
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  schema. It's recommended to run this command after the migration to 3.23 and
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  to adjust things manually for cases that are not easily handled by the
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  migration script, such as indexes of entity types that have been renamed. It
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  should be mostly about dropping extra indexes.
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Data-import
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~~~~~~~~~~~
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* Deprecated `MetaGenerator` in favor of slightly adapted API in
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  `MetadataGenerator` (more consistent, giving more control to sub-classes and
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  suitable for usage with the `MassiveObjectStore`)
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* Major cleanups of the `MassiveObjectStore` and its `PGHelper` companion
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  class:
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  - dropped a bunch of unnecessary / unused attributes
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  - refactored / renamed internal methods
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  - added support for a metadata generator, the now recommended way to control
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    metadata generation
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* Deprecated `SQLGenObjectStore`, `MassiveObjectStore` should be used instead.
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Backwards-incompatible changes
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------------------------------
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* Generative tests *à la logilab-common* are not supported anymore in
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  `CubicWebTC`. It is advised to use the subtests_ API (available on
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  `CubicWebTC` either from the standard library as of Python 3.4 or through
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  unittest2 package otherwise).
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* `CubicWebTC`'s `set_description` method (comming from
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  `logilab.common.testlib.TestCase`) is no longer available.
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Development
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-----------
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When installed within a virtualenv, CubicWeb will look for instances data as
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in ``user`` mode by default, that is in ``$HOME/etc/cubicweb.d``, as opposed
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to ``$VIRTUAL_ENV/etc/cubicweb.d`` previously. To restore this behavior,
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explicitly set ``CW_MODE`` to ``system``. Alternatively (and preferably), the
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``CW_INSTANCES_DIR`` environment variables may be used to specify instances
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data location.
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.. _subtests: https://docs.python.org/3/library/unittest.html#distinguishing-test-iterations-using-subtests