def _retrieve(self, request, pk):
validate_pk(pk)
data = get_object_from_ledger(pk, self.ledger_query_call)
# do not cache if node has not process permission
if node_has_process_permission(data):
# try to get it from local db to check if description exists
try:
instance = self.get_object()
except Http404:
instance = None
finally:
# check if instance has description
if not instance or not instance.description:
instance = self.create_or_update_algo(data, pk)
# For security reason, do not give access to local file address
# Restrain data to some fields
# TODO: do we need to send creation date and/or last modified date ?
serializer = self.get_serializer(instance, fields=('owner', 'pkhash'))
data.update(serializer.data)
replace_storage_addresses(request, data)
return data
def _retrieve(self, request, key):
validate_key(key)
# get instance from remote node
data = get_object_from_ledger(get_channel_name(request), key,
'queryDataset')
# do not cache if node has not process permission
if node_has_process_permission(data):
# try to get it from local db to check if description exists
try:
instance = self.get_object()
except Http404:
instance = None
finally:
# check if instance has description or data_opener
if not instance or not instance.description or not instance.data_opener:
instance = self.create_or_update_datamanager(
get_channel_name(request), instance, data, key)
# do not give access to local files address
serializer = self.get_serializer(instance, fields=('owner'))
data.update(serializer.data)
replace_storage_addresses(request, data)
return data