doc/3.18.rst
author David Douard <david.douard@logilab.fr>
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What's new in CubicWeb 3.18?
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============================
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The migration script does not handle sqlite nor mysql instances.
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New functionalities
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--------------------
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* add a security debugging tool
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  (see `#2920304 <http://www.cubicweb.org/2920304>`_)
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* introduce an `add` permission on attributes, to be interpreted at
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  entity creation time only and allow the implementation of complex
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  `update` rules that don't block entity creation (before that the
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  `update` attribute permission was interpreted at entity creation and
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  update time)
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* the primary view display controller (uicfg) now has a
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  `set_fields_order` method similar to the one available for forms
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* new method `ResultSet.one(col=0)` to retrive a single entity and enforce the
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  result has only one row (see `#3352314 https://www.cubicweb.org/ticket/3352314`_)
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* new method `RequestSessionBase.find` to look for entities
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  (see `#3361290 https://www.cubicweb.org/ticket/3361290`_)
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* the embedded jQuery copy has been updated to version 1.10.2, and jQuery UI to
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  version 1.10.3.
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* initial support for wsgi for the debug mode, available through the new
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  ``wsgi`` cubicweb-ctl command, which can use either python's builtin
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  wsgi server or the werkzeug module if present.
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* a ``rql-table`` directive is now available in ReST fields
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* cubicweb-ctl upgrade can now generate the static data resource directory
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  directly, without a manual call to gen-static-datadir.
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API changes
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-----------
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* not really an API change, but the entity permission checks are now
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  systematically deferred to an operation, instead of a) trying in a
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  hook and b) if it failed, retrying later in an operation
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* The default value storage for attributes is no longer String, but
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  Bytes.  This opens the road to storing arbitrary python objects, e.g.
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  numpy arrays, and fixes a bug where default values whose truth value
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  was False were not properly migrated.
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* `symmetric` relations are no more handled by an rql rewrite but are
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  now handled with hooks (from the `activeintegrity` category); this
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  may have some consequences for applications that do low-level database
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  manipulations or at times disable (some) hooks.
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* `unique together` constraints (multi-columns unicity constraints)
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  get a `name` attribute that maps the CubicWeb contraint entities to
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  corresponding backend index.
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* BreadCrumbEntityVComponent's open_breadcrumbs method now includes
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  the first breadcrumbs separator
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* entities can be compared for equality and hashed
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* the ``on_fire_transition`` predicate accepts a sequence of possible
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  transition names
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* the GROUP_CONCAT rql aggregate function no longer repeats duplicate
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  values, on the sqlite and postgresql backends
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Deprecation
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---------------------
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* ``pyrorql`` sources have been deprecated. Multisource will be fully dropped
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  in the next version. If you are still using pyrorql, switch to ``datafeed``
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  **NOW**!
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* the old multi-source system
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* `find_one_entity` and `find_entities` in favor of `find`
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  (see `#3361290 https://www.cubicweb.org/ticket/3361290`_)
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* the `TmpFileViewMixin` and `TmpPngView` classes (see `#3400448
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  https://www.cubicweb.org/ticket/3400448`_)
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Deprecated Code Drops
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----------------------
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* ``ldapuser`` have been dropped; use ``ldapfeed`` now
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  (see `#2936496 <http://www.cubicweb.org/2936496>`_)
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* action ``GotRhythm`` was removed, make sure you do not
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  import it in your cubes (even to unregister it)
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  (see `#3093362 <http://www.cubicweb.org/3093362>`_)
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* all 3.8 backward compat is gone
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* all 3.9 backward compat (including the javascript side) is gone
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* the ``twisted`` (web-only) instance type has been removed