sqlalchemy.orm.unitofwork.UOWTransaction

class documentation

class UOWTransaction(object):

Undocumented

Method	`__init__`	Undocumented
Method	`_generate_actions`	Generate the full, unsorted collection of PostSortRecs as well as dependency pairs for this UOWTransaction.
Method	`_per_mapper_flush_actions`	Undocumented
Method	`execute`	Undocumented
Method	`filter_states_for_dep`	Filter the given list of InstanceStates to those relevant to the given DependencyProcessor.
Method	`finalize_flush_changes`	Mark processed objects as clean / deleted after a successful flush().
Method	`get_attribute_history`	Facade to attributes.get_state_history(), including caching of results.
Method	`has_dep`	Undocumented
Method	`is_deleted`	Return `True` if the given state is marked as deleted within this uowtransaction.
Method	`memo`	Undocumented
Method	`register_object`	Undocumented
Method	`register_post_update`	Undocumented
Method	`register_preprocessor`	Undocumented
Method	`remove_state_actions`	Remove pending actions for a state from the uowtransaction.
Method	`states_for_mapper_hierarchy`	Undocumented
Method	`was_already_deleted`	Return `True` if the given state is expired and was deleted previously.
Instance Variable	`attributes`	Undocumented
Instance Variable	`cycles`	Undocumented
Instance Variable	`dependencies`	Undocumented
Instance Variable	`deps`	Undocumented
Instance Variable	`mappers`	Undocumented
Instance Variable	`post_update_states`	Undocumented
Instance Variable	`postsort_actions`	Undocumented
Instance Variable	`presort_actions`	Undocumented
Instance Variable	`session`	Undocumented
Instance Variable	`states`	Undocumented
Property	`_mapper_for_dep`	return a dynamic mapping of (Mapper, DependencyProcessor) to True or False, indicating if the DependencyProcessor operates on objects of that Mapper.
Property	`has_work`	Undocumented

def __init__(self, session):

Undocumented

def _generate_actions(self):

Generate the full, unsorted collection of PostSortRecs as well as dependency pairs for this UOWTransaction.

def _per_mapper_flush_actions(self, mapper):

Undocumented

def execute(self):

Undocumented

def filter_states_for_dep(self, dep, states):

Filter the given list of InstanceStates to those relevant to the given DependencyProcessor.

def finalize_flush_changes(self):

Mark processed objects as clean / deleted after a successful flush().

This method is called within the flush() method after the execute() method has succeeded and the transaction has been committed.

def get_attribute_history(self, state, key, passive=attributes.PASSIVE_NO_INITIALIZE):

Facade to attributes.get_state_history(), including caching of results.

def has_dep(self, processor):

Undocumented

def is_deleted(self, state):

Return True if the given state is marked as deleted within this uowtransaction.

def memo(self, key, callable_):

Undocumented

def register_object(self, state, isdelete=False, listonly=False, cancel_delete=False, operation=None, prop=None):

Undocumented

def register_post_update(self, state, post_update_cols):

Undocumented

def register_preprocessor(self, processor, fromparent):

Undocumented

def remove_state_actions(self, state):

Remove pending actions for a state from the uowtransaction.

def states_for_mapper_hierarchy(self, mapper, isdelete, listonly):

Undocumented

def was_already_deleted(self, state):

Return True if the given state is expired and was deleted previously.

attributes: dict =

Undocumented

cycles =

Undocumented

dependencies: set =

Undocumented

deps =

Undocumented

mappers =

Undocumented

post_update_states =

Undocumented

postsort_actions: dict =

Undocumented

presort_actions: dict =

Undocumented

session =

Undocumented

states: dict =

Undocumented

@util.memoized_property
_mapper_for_dep =

return a dynamic mapping of (Mapper, DependencyProcessor) to True or False, indicating if the DependencyProcessor operates on objects of that Mapper.

The result is stored in the dictionary persistently once calculated.

@property
has_work =

Undocumented