sqlalchemy.ext.associationproxy._AssociationSingleItem

class documentation

class _AssociationSingleItem(_AssociationCollection[_T]): (source)

Known subclasses: sqlalchemy.ext.associationproxy._AssociationList, sqlalchemy.ext.associationproxy._AssociationSet

Undocumented

Class Variable	`creator`	A function that creates new target entities. Given one parameter: value. This assertion is assumed::
Class Variable	`setter`	A function. Given an associated object and a value, store that value on the object.
Method	`_bulk_replace`	Undocumented
Method	`_create`	Undocumented
Method	`_get`	Undocumented

Inherited from _AssociationCollection:

Method	`__bool__`	Undocumented
Method	`__getstate__`	Undocumented
Method	`__init__`	Constructs an _AssociationCollection.
Method	`__len__`	Undocumented
Method	`__setstate__`	Undocumented
Method	`clear`	Undocumented
Class Variable	`col`	Undocumented
Instance Variable	`getter`	A function. Given an associated object, return the 'value'.
Instance Variable	`lazy_collection`	A callable returning a list-based collection of entities (usually an object attribute managed by a SQLAlchemy relationship())
Instance Variable	`parent`	Undocumented

creator: _PlainCreatorProtocol[_T] = (source) ¶

overrides sqlalchemy.ext.associationproxy._AssociationCollection.creator

A function that creates new target entities. Given one parameter: value. This assertion is assumed:: obj = creator(somevalue) assert getter(obj) == somevalue

setter: _PlainSetterProtocol[_T] = (source) ¶

overrides sqlalchemy.ext.associationproxy._AssociationCollection.setter

A function. Given an associated object and a value, store that value on the object.

def _bulk_replace(self, assoc_proxy: AssociationProxyInstance[Any], values: Iterable[_IT]): (source) ¶

overridden in sqlalchemy.ext.associationproxy._AssociationSet

Undocumented

def _create(self, value: _T) -> Any: (source) ¶

Undocumented

def _get(self, object_: Any) -> _T: (source) ¶

Undocumented