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large patch to get ORM / typing efforts started.
this is to support adding new test cases to mypy,
support dropping sqlalchemy2-stubs entirely from the
test suite, validate major ORM typing reorganization
to eliminate the need for the mypy plugin.
* New declarative approach which uses annotation
introspection, fixes: #7535
* Mapped[] is now at the base of all ORM constructs
that find themselves in classes, to support direct
typing without plugins
* Mypy plugin updated for new typing structures
* Mypy test suite broken out into "plugin" tests vs.
"plain" tests, and enhanced to better support test
structures where we assert that various objects are
introspected by the type checker as we expect.
as we go forward with typing, we will
add new use cases to "plain" where we can assert that
types are introspected as we expect.
* For typing support, users will be much more exposed to the
class names of things. Add these all to "sqlalchemy" import
space.
* Column(ForeignKey()) no longer needs to be `@declared_attr`
if the FK refers to a remote table
* composite() attributes mapped to a dataclass no longer
need to implement a `__composite_values__()` method
* with_variant() accepts multiple dialect names
Change-Id: I22797c0be73a8fbbd2d6f5e0c0b7258b17fe145d
Fixes: #7535
Fixes: #7551
References: #6810
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References: #4600
Change-Id: I61e35bc93fe95610ae75b31c18a3282558cd4ffe
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Co-authored-by: Mike Bayer <mike_mp@zzzcomputing.com>
Change-Id: I92013aad471baf32df1b51b756e86d95449b5cfd
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a few changes for py2k:
* map_imperatively() includes the check that a class
is being sent, this was only working for mapper() before
* the test suite didn't place the py2k "autouse" workaround
in the correct order, seemingly, tried to adjust the
per-test ordering setup in pytestplugin.py
Change-Id: I4cc39630724e810953cfda7b2afdadc8b948e3c2
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Adjusted the declarative scan for dataclasses so that the inheritance
behavior of :func:`_orm.declared_attr` established on a mixin, when using
the new form of having it inside of a ``dataclasses.field()`` construct and
not actually a descriptor attribute on the class, correctly accommodates
the case when the target class to be mapped is a subclass of an existing
mapped class which has already mapped that :func:`_orm.declared_attr`, and
therefore should not be re-applied to this class.
Also, as changed in ed3f2c617239668d we now have an "is_dataclass"
boolean set as we iterate through attrs so we can remove this
from declared_attr.
Fixes: #6346
Change-Id: Iec75bdefd3bff7d8a9a157c8dd744ac14ff15ea8
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Added support for the :class:`_orm.declared_attr` object to work in the
context of dataclass fields.
Fixes: #6100
Change-Id: Ifaf4a6482c866d6cfee99d8bc2c6294d923460d7
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Fixed issue in new ORM dataclasses functionality where dataclass fields on
an abstract base or mixin that contained column or other mapping constructs
would not be mapped if they also included a "default" key within the
dataclasses.field() object.
Fixes: #6093
Change-Id: I628086ceb48ab1dd0702f239cd12be74074f58f1
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Fixed issue where mixin attribute rules were not taking
effect correctly for attributes pulled from dataclasses
using the approach added in #5745.
Fixes: #5876
Change-Id: I45099a42de1d9611791e72250fe0edc69bed684c
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Added an alternate resolution scheme to Declarative that will extract the
SQLAlchemy column or mapped property from the "metadata" dictionary of a
dataclasses.Field object. This allows full declarative mappings to be
combined with dataclass fields.
Fixes: #5745
Change-Id: I1165bc025246a4cb9fc099b1b7c46a6b0f799b23
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It's better, the majority of these changes look more readable to me.
also found some docstrings that had formatting / quoting issues.
Change-Id: I582a45fde3a5648b2f36bab96bad56881321899b
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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
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Added support for direct mapping of Python classes that are defined using
the Python ``dataclasses`` decorator. See the section
:ref:`mapping_dataclasses` for background. Pull request courtesy Václav
Klusák.
Fixes: #5027
Closes: #5516
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/5516
Pull-request-sha: bb48c63d1561ca48c954ad9f84a3eb2646571115
Change-Id: Ie33db2aae4adeeb5d99633fe926b9c30bab0b885
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