def _set_iterable(self, state, iterable, adapter=None):
"""Set a collection value from an iterable of state-bearers.
``adapter`` is an optional callable invoked with a CollectionAdapter
and the iterable. Should return an iterable of state-bearing
instances suitable for appending via a CollectionAdapter. Can be used
for, e.g., adapting an incoming dictionary into an iterator of values
rather than keys.
"""
# pulling a new collection first so that an adaptation exception does
# not trigger a lazy load of the old collection.
new_collection, user_data = self._build_collection(state)
if adapter:
new_values = list(adapter(new_collection, iterable))
else:
new_values = list(iterable)
old = self.get(state)
# ignore re-assignment of the current collection, as happens
# implicitly with in-place operators (foo.collection |= other)
if old is iterable:
return
if self.key not in state.committed_state:
state.committed_state[self.key] = self.copy(old)
old_collection = self.get_collection(state, old)
state.dict[self.key] = user_data
state.modified = True
collections.bulk_replace(new_values, old_collection, new_collection)
old_collection.unlink(old)
def _set_iterable(self, state, iterable, adapter=None):
"""Set a collection value from an iterable of state-bearers.
``adapter`` is an optional callable invoked with a CollectionAdapter
and the iterable. Should return an iterable of state-bearing
instances suitable for appending via a CollectionAdapter. Can be used
for, e.g., adapting an incoming dictionary into an iterator of values
rather than keys.
"""
# pulling a new collection first so that an adaptation exception does
# not trigger a lazy load of the old collection.
new_collection, user_data = self._build_collection(state)
if adapter:
new_values = list(adapter(new_collection, iterable))
else:
new_values = list(iterable)
old = self.get(state)
# ignore re-assignment of the current collection, as happens
# implicitly with in-place operators (foo.collection |= other)
if old is iterable:
return
if self.key not in state.committed_state:
state.committed_state[self.key] = self.copy(old)
old_collection = self.get_collection(state, old)
state.dict[self.key] = user_data
state.modified = True
collections.bulk_replace(new_values, old_collection, new_collection)
old_collection.unlink(old)
def _set_iterable(self, state, dict_, iterable, adapter=None):
"""Set a collection value from an iterable of state-bearers.
``adapter`` is an optional callable invoked with a CollectionAdapter
and the iterable. Should return an iterable of state-bearing
instances suitable for appending via a CollectionAdapter. Can be used
for, e.g., adapting an incoming dictionary into an iterator of values
rather than keys.
"""
# pulling a new collection first so that an adaptation exception does
# not trigger a lazy load of the old collection.
new_collection, user_data = self._initialize_collection(state)
if adapter:
new_values = list(adapter(new_collection, iterable))
else:
new_values = list(iterable)
old = self.get(state, dict_, passive=PASSIVE_ONLY_PERSISTENT)
if old is PASSIVE_NO_RESULT:
old = self.initialize(state, dict_)
elif old is iterable:
# ignore re-assignment of the current collection, as happens
# implicitly with in-place operators (foo.collection |= other)
return
# place a copy of "old" in state.committed_state
state.modified_event(dict_, self, old, True)
old_collection = getattr(old, '_sa_adapter')
dict_[self.key] = user_data
collections.bulk_replace(new_values, old_collection, new_collection)
old_collection.unlink(old)
def _set_iterable(self, state, dict_, iterable, adapter=None):
"""Set a collection value from an iterable of state-bearers.
``adapter`` is an optional callable invoked with a CollectionAdapter
and the iterable. Should return an iterable of state-bearing
instances suitable for appending via a CollectionAdapter. Can be used
for, e.g., adapting an incoming dictionary into an iterator of values
rather than keys.
"""
# pulling a new collection first so that an adaptation exception does
# not trigger a lazy load of the old collection.
new_collection, user_data = self._initialize_collection(state)
if adapter:
new_values = list(adapter(new_collection, iterable))
else:
new_values = list(iterable)
old = self.get(state, dict_, passive=PASSIVE_ONLY_PERSISTENT)
if old is PASSIVE_NO_RESULT:
old = self.initialize(state, dict_)
elif old is iterable:
# ignore re-assignment of the current collection, as happens
# implicitly with in-place operators (foo.collection |= other)
return
# place a copy of "old" in state.committed_state
state.modified_event(dict_, self, old, True)
old_collection = getattr(old, '_sa_adapter')
dict_[self.key] = user_data
collections.bulk_replace(new_values, old_collection, new_collection)
old_collection.unlink(old)
def _set_iterable(self, state, dict_, iterable, adapter=None):
collection_history = self._modified_event(state, dict_)
new_values = list(iterable)
if state.has_identity:
old_collection = list(self.get(state, dict_))
else:
old_collection = []
collections.bulk_replace(
new_values, DynCollectionAdapter(self, state, old_collection),
DynCollectionAdapter(self, state, new_values))
def _set_iterable(self, state, dict_, iterable, adapter=None):
collection_history = self._modified_event(state, dict_)
new_values = list(iterable)
if _state_has_identity(state):
old_collection = list(self.get(state, dict_))
else:
old_collection = []
collections.bulk_replace(new_values, DynCollectionAdapter(self, state, old_collection), DynCollectionAdapter(self, state, new_values))