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| author | Mike Bayer <mike_mp@zzzcomputing.com> | 2022-02-18 10:05:12 -0500 |
|---|---|---|
| committer | Mike Bayer <mike_mp@zzzcomputing.com> | 2022-05-20 14:19:02 -0400 |
| commit | a463b1109abb60fc85f8356f30c0351a4e2ed71e (patch) | |
| tree | de8f96b7bce319fc0f19f56b302202ea3e4e91db /lib/sqlalchemy/orm/__init__.py | |
| parent | 9e7bed9df601ead02fd96bf2fc787b23b536d2d6 (diff) | |
| download | sqlalchemy-a463b1109abb60fc85f8356f30c0351a4e2ed71e.tar.gz | |
implement dataclass_transforms
Implement a new means of creating a mapped dataclass where
instead of applying the `@dataclass` decorator distinctly,
the declarative process itself can create the dataclass.
MapperProperty and MappedColumn objects themselves take
the place of the dataclasses.Field object when constructing
the class.
The overall approach is made possible at the typing level
using pep-681 dataclass transforms [1].
This new approach should be able to completely supersede the
previous "dataclasses" approach of embedding metadata into
Field() objects, which remains a mutually exclusive declarative
setup style (mixing them introduces new issues that are not worth
solving).
[1] https://peps.python.org/pep-0681/#transform-descriptor-types-example
Fixes: #7642
Change-Id: I6ba88a87c5df38270317b4faf085904d91c8a63c
Diffstat (limited to 'lib/sqlalchemy/orm/__init__.py')
| -rw-r--r-- | lib/sqlalchemy/orm/__init__.py | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/sqlalchemy/orm/__init__.py b/lib/sqlalchemy/orm/__init__.py index b7d1df532..4f19ba946 100644 --- a/lib/sqlalchemy/orm/__init__.py +++ b/lib/sqlalchemy/orm/__init__.py @@ -60,6 +60,7 @@ from .decl_api import DeclarativeBaseNoMeta as DeclarativeBaseNoMeta from .decl_api import DeclarativeMeta as DeclarativeMeta from .decl_api import declared_attr as declared_attr from .decl_api import has_inherited_table as has_inherited_table +from .decl_api import MappedAsDataclass as MappedAsDataclass from .decl_api import registry as registry from .decl_api import synonym_for as synonym_for from .descriptor_props import Composite as Composite |