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path: root/lib/sqlalchemy/ext/declarative/clsregistry.py
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* Build out new declarative systems; deprecate mapper()Mike Bayer2020-09-101-389/+0
| | | | | | | | | | | | | The ORM Declarative system is now unified into the ORM itself, with new import spaces under ``sqlalchemy.orm`` and new kinds of mappings. Support for decorator-based mappings without using a base class, support for classical style-mapper() calls that have access to the declarative class registry for relationships, and full integration of Declarative with 3rd party class attribute systems like ``dataclasses`` and ``attrs`` is now supported. Fixes: #5508 Change-Id: I130b2b6edff6450bfe8a3e6baa099ff04b5471ff
* Fix a wide variety of typos and broken linksaplatkouski2020-06-251-1/+1
| | | | | | | | | | | | Note the PR has a few remaining doc linking issues listed in the comment that must be addressed separately. Signed-off-by: aplatkouski <5857672+aplatkouski@users.noreply.github.com> Closes: #5371 Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/5371 Pull-request-sha: 7e7d233cf3a0c66980c27db0fcdb3c7d93bc2510 Change-Id: I9c36e8d8804483950db4b42c38ee456e384c59e3
* Run search and replace of symbolic module namesMike Bayer2020-04-141-1/+1
| | | | | | | | Replaces a wide array of Sphinx-relative doc references with an abbreviated absolute form now supported by zzzeeksphinx. Change-Id: I94bffcc3f37885ffdde6238767224296339698a2
* Use dot-separated name resolution for relationship targetMike Bayer2020-04-071-13/+43
| | | | | | | | | | | | | | | The string argument accepted as the first positional argument by the :func:`.relationship` function when using the Declarative API is no longer interpreted using the Python ``eval()`` function; instead, the name is dot separated and the names are looked up directly in the name resolution dictionary without treating the value as a Python expression. However, passing a string argument to the other :func:`.relationship` parameters that necessarily must accept Python expressions will still use ``eval()``; the documentation has been clarified to ensure that there is no ambiguity that this is in use. Fixes: #5238 Change-Id: Id802f403190adfab0ca034afe2214ba10fd9cfbb
* Simplified module pre-loading strategy and made it linter friendlyFederico Caselli2020-03-071-3/+3
| | | | | | | | | | | | | | | | | Introduced a modules registry to register modules that should be lazily loaded in the package init. This ensures that they are in the system module cache, avoiding potential thread safety issues as when importing them directly in the function that uses them. The module registry is used to obtain these modules directly, ensuring that the all the lazily loaded modules are resolved at the proper time This replaces dependency_for decorator and the dependencies decorator logic, removing the need to pass the resolved modules as arguments of the decodated functions and removes possible errors caused by linters. Fixes: #4689 Fixes: #4656 Change-Id: I2e291eba4297867fc0ddb5d875b9f7af34751d01
* Ensure all nested exception throws have a causeMike Bayer2020-03-021-6/+9
| | | | | | | | | | | | | | | Applied an explicit "cause" to most if not all internally raised exceptions that are raised from within an internal exception catch, to avoid misleading stacktraces that suggest an error within the handling of an exception. While it would be preferable to suppress the internally caught exception in the way that the ``__suppress_context__`` attribute would, there does not as yet seem to be a way to do this without suppressing an enclosing user constructed context, so for now it exposes the internally caught exception as the cause so that full information about the context of the error is maintained. Fixes: #4849 Change-Id: I55a86b29023675d9e5e49bc7edc5a2dc0bcd4751
* happy new yearMike Bayer2020-01-011-1/+1
| | | | Change-Id: I08440dc25e40ea1ccea1778f6ee9e28a00808235
* Implement new ClauseElement role and coercion systemMike Bayer2019-05-181-1/+1
| | | | | | | | | | | | | | | | | | | | A major refactoring of all the functions handle all detection of Core argument types as well as perform coercions into a new class hierarchy based on "roles", each of which identify a syntactical location within a SQL statement. In contrast to the ClauseElement hierarchy that identifies "what" each object is syntactically, the SQLRole hierarchy identifies the "where does it go" of each object syntactically. From this we define a consistent type checking and coercion system that establishes well defined behviors. This is a breakout of the patch that is reorganizing select() constructs to no longer be in the FromClause hierarchy. Also includes a rename of as_scalar() into scalar_subquery(); deprecates automatic coercion to scalar_subquery(). Partially-fixes: #4617 Change-Id: I26f1e78898693c6b99ef7ea2f4e7dfd0e8e1a1bd
* happy new yearMike Bayer2019-01-111-1/+1
| | | | Change-Id: I6a71f4924d046cf306961c58dffccf21e9c03911
* Post black reformattingMike Bayer2019-01-061-10/+11
| | | | | | | | | | | | | Applied on top of a pure run of black -l 79 in I7eda77fed3d8e73df84b3651fd6cfcfe858d4dc9, this set of changes resolves all remaining flake8 conditions for those codes we have enabled in setup.cfg. Included are resolutions for all remaining flake8 issues including shadowed builtins, long lines, import order, unused imports, duplicate imports, and docstring issues. Change-Id: I4f72d3ba1380dd601610ff80b8fb06a2aff8b0fe
* Run black -l 79 against all source filesMike Bayer2019-01-061-49/+76
| | | | | | | | | | | | | | This is a straight reformat run using black as is, with no edits applied at all. The black run will format code consistently, however in some cases that are prevalent in SQLAlchemy code it produces too-long lines. The too-long lines will be resolved in the following commit that will resolve all remaining flake8 issues including shadowed builtins, long lines, import order, unused imports, duplicate imports, and docstring issues. Change-Id: I7eda77fed3d8e73df84b3651fd6cfcfe858d4dc9
* happy new yearMike Bayer2018-01-121-1/+1
| | | | Change-Id: I3ef36bfd0cb0ba62b3123c8cf92370a43156cf8f
* update for 2017 copyrightMike Bayer2017-01-041-1/+1
| | | | Change-Id: I4e8c2aa8fe817bb2af8707410fa0201f938781de
* - happy new yearMike Bayer2016-01-291-1/+1
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* py2k: accept unicode literals on :func:`backref`, toopr/212Nils Philippsen2015-11-251-1/+2
| | | | | | | | Fixed bug where in Py2K a unicode literal would not be accepted as the string name of a class or other argument within declarative using :func:`.backref` on :func:`.relationship`. amends commit e6f67f48054d906856f879bc1803ea639aa4b670
* - copyright 2015Mike Bayer2015-03-101-1/+1
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* - strategies + declarativeMike Bayer2015-01-041-0/+10
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* - Fixed an unlikely race condition observed in some exotic end-userMike Bayer2014-09-181-1/+6
| | | | | | | | setups, where the attempt to check for "duplicate class name" in declarative would hit upon a not-totally-cleaned-up weak reference related to some other class being removed; the check here now ensures the weakref still references an object before calling upon it further. fixes #3208
* PEP8 style fixesBrian Jarrett2014-07-131-14/+16
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* - break up the <authors> copyright comment as part of a passMike Bayer2014-07-091-1/+2
| | | | to get all flake8 passing
* - Support is improved for supplying a :func:`.join` construct as theMike Bayer2014-01-221-0/+4
| | | | | | | | | | target of :paramref:`.relationship.secondary` for the purposes of creating very complex :func:`.relationship` join conditions. The change includes adjustments to query joining, joined eager loading to not render a SELECT subquery, changes to lazy loading such that the "secondary" target is properly included in the SELECT, and changes to declarative to better support specification of a join() object with classes as targets.
* - happy new yearMike Bayer2014-01-051-1/+1
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* - The :class:`.DeferredReflection` class has been enhanced to provideMike Bayer2013-12-031-37/+52
| | | | | | | | | | | | | | | | automatic reflection support for the "secondary" table referred to by a :func:`.relationship`. "secondary", when specified either as a string table name, or as a :class:`.Table` object with only a name and :class:`.MetaData` object will also be included in the reflection process when :meth:`.DeferredReflection.prepare` is called. [ticket:2865] - clsregistry._resolver() now uses a stateful _class_resolver() class in order to handle the work of mapping strings to objects. This is to provide for simpler extensibility, namely a ._resolvers collection of ad-hoc name resolution functions; the DeferredReflection class adds its own resolver here in order to handle relationship(secondary) names which generate new Table objects.
* Fixed bug where in Py2K a unicode literal would not be acceptedMike Bayer2013-11-291-1/+1
| | | | | as the string name of a class or other argument within declarative using :func:`.relationship`.
* ORM descriptors such as hybrid properties can now be referencedMike Bayer2013-07-021-10/+12
| | | | | | by name in a string argument used with ``order_by``, ``primaryjoin``, or similar in :func:`.relationship`, in addition to column-bound attributes. [ticket:2761]
* - the raw 2to3 runMike Bayer2013-04-271-3/+3
| | | | - went through examples/ and cleaned out excess list() calls
* happy new year (see #2645)Diana Clarke2013-01-011-1/+1
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* Allow use of synonyms in primaryjoin / secondaryjoin conditionsRichard Mitchell2012-11-271-2/+5
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* just a pep8 pass of lib/sqlalchemy/ext/declarativeDiana Clarke2012-11-191-2/+10
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* - store only MultipleClassMarkers inside of ModuleMarker, thenMike Bayer2012-10-281-23/+56
| | | | | | store ModuleMarkers for multiple roots, one for each token in a module path. this allows partial path resolution. - docs to this effect
* - reorganization of declarative such that file sizes are managable again.Mike Bayer2012-08-051-0/+244
the vast majority of file lines are spent on documentation, which moves into package __init__. The core declarative idea lives in base and is back down to its originally low size of under 500 lines. The various helpers and such move into api.py, and the full span of string lookup moves into a new module clsregistry. the rest of declarative only refers to two functions in clsregistry in three places inside of base. - [feature] Declarative now maintains a registry of classes by string name as well as by full module-qualified name. Multiple classes with the same name can now be looked up based on a module-qualified string within relationship(). Simple class name lookups where more than one class shares the same name now raises an informative error message. [ticket:2338] - lots of tests to ensure the new weak referencing memory management is maintained by the new class registry system. this ticket was served very well by waiting to do #2526 first, else this would have needed to be rewritten anyway.
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