doc/changes/3.25.rst
author Denis Laxalde <denis.laxalde@logilab.fr>
Thu, 27 Jun 2019 12:27:37 +0200
branch3.26
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permissions -rw-r--r--
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3.25 (14 April 2017)
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====================
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New features
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------------
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* A new option `connections-pooler-enabled` (default yes) has been added. This
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  allow to switch off internal connection pooling for use with others poolers
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  such as pgbouncer_.
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.. _pgbouncer: https://pgbouncer.github.io/
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* In `deleteconf` view (confirmation before deletion), the list of first-level
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  composite objects that would be deleted along with the primary entity is
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  displayed (01eeea97e549).
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* The ``cubicweb.pyramid`` module now provides a Paste application factory
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  registered as an entry point named ``pyramid_main`` and that can be used to
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  run a Pyramid WSGI application bound to a CubicWeb repository.
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* A new configuration type ``pyramid`` has been added to create CubicWeb's
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  instances (through ``cubicweb-ctl create -c pyramid <basecube> <appid>``).
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  This configuration bootstraps a CubicWeb instance that is essentially a
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  repository plus the minimal setup to run a Pyramid WSGI application on top
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  of it. Noticeably, it does not ship all *web* configuration but rather
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  relies on configuration declared in a ``development.ini`` file for any
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  Pyramid application.
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* A new way to declare workflows as simple data structure (dict/list) has been
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  introduced. Respective utility functions live in ``cubicweb.wfutils``
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  module. This handles both the creation and migration of workflows.
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* A new IDublinCore adapter has been introduced to control the generation of
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  Dublin Core metadata that are used in several base views.
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* It is now possible to *derive* rtags using their ``derive`` method
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  (0849a5eb57b8). Derived rtags keep a reference to the original rtag and only
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  hold custom rules, allowing changes which are done in the original rtag after
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  derivation to be still considered.
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* A new ``cubicweb-ctl scheduler <appid>`` command has been introduced to run
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  background and periodic tasks of the repository (previously called *looping
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  tasks*). In a production environment, a process with this command should be
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  run alongside with a WSGI server process (possibly running multiple
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  processes itself).
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Backwards incompatible changes
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------------------------------
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* As a consequence of the replacement of the old looping tasks manager by a
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  scheduler, all cubicweb-ctl's "start" commands (i.e. ``start``, ``pyramid``,
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  ``wsgi``) do not start repository *looping tasks manager* anymore, nor do
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  they start the scheduler. Site administrators are thus expected to start
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  this scheduler as a separate process. Also, registering looping tasks (i.e.
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  calling ``repo.looping_tasks()``) is a no-op when the repository has no
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  scheduler set; a warning is issued in such cases. Application developers may
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  rely on repository's ``has_scheduler`` method to determine if they should
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  register a looping task or not.
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* In ``cubicweb.pyramid``, function ``make_cubicweb_application`` got renamed
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  into ``config_from_cwconfig`` (950ce7d9f642).
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* Several cleanups in repository's session management have been conducted
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  resulting from changes introduced in 3.19 release. Among others, the
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  ``cubicweb.server.session.Session`` class has been dropped, and request
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  ``session`` attribute is now tight to a web session whose implementation
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  depends on the front-end used (twisted or pyramid). Hence this attribute
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  should not be accessed from "repository side" code (e.g. hooks or operations)
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  and has lost some of his former attributes like ``repo`` which used to
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  reference the repository instance. Due to this, you don't have anymore access
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  to session's data through the connection, which leds to deprecation of the
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  ``data`` attribute and removal of ``get_shared_data`` and ``set_shared_data``
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  methods which are deprecated since 3.19.
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* Support for 'https-url' configuration option has been removed
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  (4516c3956d46).
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* The `next_tabindex` method of request class has been removed (011730a4af73).
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* The `cubicweb.hook.logstats.start` hook was dropped because it's looping
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  task would not be run in a web instance (see first point about repository
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  scheduler).
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* ``uicfg`` rules  to hide the opposite relation of inlined form are not anymore
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  automatically added, because this was actually done randomly and so not
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  reliable, so you'll have to add them manually:
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  ::
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    autoform_section.tag_subject_of(('CWUser', 'use_email', 'EmailAddress'),
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                                    'main', 'inlined')
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    autoform_section.tag_object_of(('CWUser', 'use_email', 'EmailAddress'),
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                                   'inlined', 'hidden')