sqlalchemy.orm.attributes.ScalarObjectAttributeImpl

class documentation

class ScalarObjectAttributeImpl(ScalarAttributeImpl):

represents a scalar-holding InstrumentedAttribute, where the target object is also instrumented.

Adds events to delete/set operations.

Method	`delete`	Undocumented
Method	`fire_remove_event`	Undocumented
Method	`fire_replace_event`	Undocumented
Method	`get_all_pending`	Return a list of tuples of (state, obj) for all objects in this attribute's current state + history.
Method	`get_history`	Undocumented
Method	`set`	Set a value on the given InstanceState.
Class Variable	`__slots__`	Undocumented
Class Variable	`collection`	Undocumented
Class Variable	`default_accepts_scalar_loader`	Undocumented
Class Variable	`supports_population`	Undocumented
Class Variable	`uses_objects`	Undocumented

Method	`__str__`	Undocumented
Method	`_default_value`	Produce an empty value for an uninitialized scalar attribute.
Method	`_fire_loader_callables`	Undocumented
Method	`_get_active_history`	Backwards compat for impl.active_history
Method	`_set_active_history`	Undocumented
Method	`append`	Undocumented
Method	`get`	No summary
Method	`get_committed_value`	return the unchanged value of this attribute
Method	`hasparent`	Return the boolean value of a `hasparent` flag attached to the given state.
Method	`pop`	Undocumented
Method	`remove`	Undocumented
Method	`set_committed_value`	set an attribute value on the given instance and 'commit' it.
Method	`sethasparent`	Set a boolean flag on the given item corresponding to whether or not it is attached to a parent object via the attribute represented by this `InstrumentedAttribute`.
Class Variable	`active_history`	Undocumented
Instance Variable	`_deferred_history`	Undocumented
Instance Variable	`_modified_token`	Undocumented
Instance Variable	`accepts_scalar_loader`	Undocumented
Instance Variable	`callable_`	Undocumented
Instance Variable	`class_`	Undocumented
Instance Variable	`dispatch`	Undocumented
Instance Variable	`is_equal`	Undocumented
Instance Variable	`key`	Undocumented
Instance Variable	`load_on_unexpire`	Undocumented
Instance Variable	`parent_token`	Undocumented
Instance Variable	`send_modified_events`	Undocumented
Instance Variable	`trackparent`	Undocumented

def delete(self, state, dict_):

overrides sqlalchemy.orm.attributes.ScalarAttributeImpl.delete

Undocumented

def fire_remove_event(self, state, dict_, value, initiator):

overrides sqlalchemy.orm.attributes.ScalarAttributeImpl.fire_remove_event

Undocumented

def fire_replace_event(self, state, dict_, value, previous, initiator):

overrides sqlalchemy.orm.attributes.ScalarAttributeImpl.fire_replace_event

Undocumented

def get_all_pending(self, state, dict_, passive=PASSIVE_NO_INITIALIZE):

overrides sqlalchemy.orm.attributes.AttributeImpl.get_all_pending

Return a list of tuples of (state, obj) for all objects in this attribute's current state + history.

Only applies to object-based attributes.

This is an inlining of existing functionality which roughly corresponds to:

get_state_history(

state, key, passive=PASSIVE_NO_INITIALIZE).sum()

def get_history(self, state, dict_, passive=PASSIVE_OFF):

overrides sqlalchemy.orm.attributes.ScalarAttributeImpl.get_history

Undocumented

def set(self, state, dict_, value, initiator, passive=PASSIVE_OFF, check_old=None, pop=False):

overrides sqlalchemy.orm.attributes.ScalarAttributeImpl.set

Set a value on the given InstanceState.

__slots__: tuple =

overrides sqlalchemy.orm.attributes.ScalarAttributeImpl.__slots__

Undocumented

collection: bool =

overrides sqlalchemy.orm.attributes.ScalarAttributeImpl.collection

Undocumented

default_accepts_scalar_loader: bool =

overrides sqlalchemy.orm.attributes.ScalarAttributeImpl.default_accepts_scalar_loader

Undocumented

supports_population: bool =

overrides sqlalchemy.orm.attributes.ScalarAttributeImpl.supports_population

Undocumented

uses_objects: bool =

overrides sqlalchemy.orm.attributes.ScalarAttributeImpl.uses_objects

Undocumented