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| author | Mike Bayer <mike_mp@zzzcomputing.com> | 2022-09-26 14:38:44 -0400 |
|---|---|---|
| committer | mike bayer <mike_mp@zzzcomputing.com> | 2022-10-06 00:36:25 +0000 |
| commit | 276349200c486eee108471b888acfc47ea19201b (patch) | |
| tree | 7441fa3219f21b18c6e532bd85b25c2bbdae86f8 /lib/sqlalchemy/orm/interfaces.py | |
| parent | 566cccc8645be99a23811c39d43481d7248628b0 (diff) | |
| download | sqlalchemy-276349200c486eee108471b888acfc47ea19201b.tar.gz | |
implement write-only colletions, typing for dynamic
For 2.0, we provide a truly "larger than memory collection"
implementation, a write-only collection that will never
under any circumstances implicitly load the entire
collection, even during flush.
This is essentially a much more "strict" version
of the "dynamic" loader, which in fact has a lot of
scenarios that it loads the full backing collection
into memory, mostly defeating its purpose.
Typing constructs are added that support
both the new feature WriteOnlyMapping as well as the
legacy feature DynamicMapping. These have been
integrated with "annotion based mapping" so that
relationship() uses these annotations to configure
the loader strategy as well.
additional changes:
* the docs triggered a conflict in hybrid's
"transformers" section, this section is hard-coded
to Query using a pattern that doesnt seem to have
any use and isn't part of the current select()
interface, so just removed this section
* As the docs for WriteOnlyMapping are very long,
collections.rst is broken up into two pages now.
Fixes: #6229
Fixes: #7123
Change-Id: I6929f3da6e441cad92285e7309030a9bac4e429d
Diffstat (limited to 'lib/sqlalchemy/orm/interfaces.py')
| -rw-r--r-- | lib/sqlalchemy/orm/interfaces.py | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/sqlalchemy/orm/interfaces.py b/lib/sqlalchemy/orm/interfaces.py index b3fbe6ba7..9903c5f4a 100644 --- a/lib/sqlalchemy/orm/interfaces.py +++ b/lib/sqlalchemy/orm/interfaces.py @@ -77,6 +77,7 @@ if typing.TYPE_CHECKING: from ._typing import _InternalEntityType from ._typing import _ORMAdapterProto from .attributes import InstrumentedAttribute + from .base import Mapped from .context import _MapperEntity from .context import ORMCompileState from .context import QueryContext @@ -157,6 +158,7 @@ class _IntrospectsAnnotations: registry: RegistryType, cls: Type[Any], key: str, + mapped_container: Optional[Type[Mapped[Any]]], annotation: Optional[_AnnotationScanType], extracted_mapped_annotation: Optional[_AnnotationScanType], is_dataclass_field: bool, |