def execute_aggregate(self, uow, recs):
cls_ = self.__class__
mapper = self.mapper
our_recs = [
r for r in recs if r.__class__ is cls_ and r.mapper is mapper
]
recs.difference_update(our_recs)
persistence.save_obj(mapper,
[self.state] + [r.state for r in our_recs], uow)
def execute_aggregate(self, uow, recs):
cls_ = self.__class__
mapper = self.mapper
our_recs = [
r for r in recs if r.__class__ is cls_ and r.mapper is mapper
]
recs.difference_update(our_recs)
persistence.save_obj(mapper,
[self.state] + [r.state for r in our_recs], uow)
def fast_save(obj, session):
"""fast_save().
This is a quick prototype version of the "insert/update/delete row"
helper proposed in
https://bitbucket.org/zzzeek/sqlalchemy/issue/3100/sessionflush_object.
The code below is pretty much the whole implementation - we skip everything
within the unit of work process in order to handle a single row at a time.
All the various checks that involve multiple objects being present
are bypassed, including:
* retreiving dirty/new/deleted objects for flush, registering them
with a "flush context"
* resolution of dependencies between mappings and possibly individual
instances
* resolution of relationships, including loading missing values we might
need, synchronizing priamry key values into foreign key values
* resolution of primary keys mutating into other values
* resolution of other objects that might be conflicting with
a primary key change here
* logic to detect if the instance that we're flushing has been garbage
collected already, and we are only dealing with a "ghost" state
What's nice about this system is that we retain support for:
* flushing of inheritance structures
* the before_XXX / after_XXX mapper events still fire off
* handy things like prefetching/postfetching of server side defaults
etc. still work
* the object continues along within the Session with it's full state
intact and up to date.
"""
state = inspect(obj)
isinsert = state.key is None
mapper = state.mapper
uowtransaction = FakeUOWTransaction(session)
with session.begin(subtransactions=True) as transaction:
uowtransaction.transaction = transaction
persistence.save_obj(mapper.base_mapper, [state],
uowtransaction, single=True)
if isinsert:
instance_key = mapper._identity_key_from_state(state)
state.key = instance_key
session.identity_map.replace(state)
session._new.pop(state)
state._commit_all(state.dict, instance_dict=session.identity_map)
session._register_altered([state])
def fast_save(obj, session):
using_scope = CONF.portal.using_scope
if using_scope:
state = inspect(obj)
isinsert = state.key is None
mapper = state.mapper
uowtransaction = FakeUOWTransaction(session)
with session.begin(subtransactions=True) as transaction:
uowtransaction.transaction = transaction
persistence.save_obj(mapper.base_mapper, [state],
uowtransaction,
single=True)
if isinsert:
instance_key = mapper._identity_key_from_state(state)
state.key = instance_key
session.identity_map.replace(state)
session._new.pop(state)
state._commit_all(state.dict, instance_dict=session.identity_map)
session._register_altered([state])
def execute(self, uow):
persistence.save_obj(self.mapper,
uow.states_for_mapper_hierarchy(self.mapper, False, False),
uow
)
def execute(self, uow):
persistence.save_obj(
self.mapper,
uow.states_for_mapper_hierarchy(self.mapper, False, False), uow)