def get_collection(self, state, user_data=None):
if user_data is None:
user_data = self.get(state)
try:
return getattr(user_data, '_sa_adapter')
except AttributeError:
collections.CollectionAdapter(self, state, user_data)
return getattr(user_data, '_sa_adapter')
def get_collection(self, state, user_data=None, passive=False):
"""retrieve the CollectionAdapter associated with the given state.
Creates a new CollectionAdapter if one does not exist.
"""
if user_data is None:
user_data = self.get(state, passive=passive)
if user_data is PASSIVE_NORESULT:
return user_data
try:
return getattr(user_data, '_sa_adapter')
except AttributeError:
# TODO: this codepath never occurs, and this
# except/initialize should be removed
collections.CollectionAdapter(self, state, user_data)
return getattr(user_data, '_sa_adapter')
def initialize_collection(self, key, state, factory):
user_data = factory()
adapter = collections.CollectionAdapter(self.get_impl(key), state,
user_data)
return adapter, user_data
def _build_collection(self, state):
"""build a new, blank collection and return it wrapped in a CollectionAdapter."""
user_data = self.collection_factory()
collection = collections.CollectionAdapter(self, state, user_data)
return collection, user_data
def _build_collection(self, state):
user_data = self.collection_factory()
collection = collections.CollectionAdapter(self, state, user_data)
return collection, user_data
