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.. _orm_internal_toplevel:
ORM Internals
=============
Key ORM constructs, not otherwise covered in other
sections, are listed here.
.. currentmodule:: sqlalchemy.orm
.. autoclass:: AttributeState
:members:
.. autoclass:: CascadeOptions
:members:
.. autoclass:: ClassManager
:members:
.. autoclass:: ColumnProperty
:members:
.. attribute:: Comparator.expressions
The full sequence of columns referenced by this
attribute, adjusted for any aliasing in progress.
.. versionadded:: 1.3.17
.. seealso::
:ref:`maptojoin` - usage example
.. autoclass:: CompositeProperty
:members:
.. autoclass:: AttributeEvent
:members:
.. autoclass:: IdentityMap
:members:
.. autoclass:: InspectionAttr
:members:
.. autoclass:: InspectionAttrInfo
:members:
.. autoclass:: InstanceState
:members:
.. autoclass:: InstrumentedAttribute
:members: __get__, __set__, __delete__
:undoc-members:
.. autodata:: MANYTOONE
.. autodata:: MANYTOMANY
.. autoclass:: Mapped
.. autoclass:: MapperProperty
:members:
.. py:attribute:: info
Info dictionary associated with the object, allowing user-defined
data to be associated with this :class:`.InspectionAttr`.
The dictionary is generated when first accessed. Alternatively,
it can be specified as a constructor argument to the
:func:`.column_property`, :func:`_orm.relationship`, or :func:`.composite`
functions.
.. versionchanged:: 1.0.0 :attr:`.InspectionAttr.info` moved
from :class:`.MapperProperty` so that it can apply to a wider
variety of ORM and extension constructs.
.. seealso::
:attr:`.QueryableAttribute.info`
:attr:`.SchemaItem.info`
.. autodata:: NOT_EXTENSION
.. autofunction:: merge_result
.. autofunction:: merge_frozen_result
.. autodata:: ONETOMANY
.. autoclass:: PropComparator
:members:
:inherited-members:
.. autoclass:: RelationshipProperty
:members:
:inherited-members:
.. autoclass:: SynonymProperty
:members:
:inherited-members:
.. autoclass:: QueryContext
:members:
.. autoclass:: QueryableAttribute
:members:
:inherited-members:
.. autoclass:: UOWTransaction
:members:
|
