def delete_download_history(cls, data):
try:
database = ArangoCore.get_database()
collections = [ArangoEdge.USER_DOWNLOAD]
with database.transaction(write=collections,
commit_on_error=False) as transaction:
ArangoCore.delete_edge_from_collection(
ArangoEdge.USER_DOWNLOAD, data.get('_key'), transaction)
transaction.commit()
return True
except Exception as exception:
raise exception
def delete_data(cls, data):
try:
database = ArangoCore.get_database()
collections = [ArangoVertex.DATA, ArangoEdge.USER_DATA]
with database.transaction(write=collections,
commit_on_error=False) as transaction:
data_id = data.get('id')
user_id = data.get('user_id')
ArangoCore.delete_vertex_from_collection(
ArangoVertex.DATA, data_id, transaction)
key = '{0}-{1}'.format(user_id, data_id)
ArangoCore.delete_edge_from_collection(ArangoEdge.USER_DATA,
key, transaction)
transaction.commit()
return True
except Exception as exception:
raise exception
def unfollow_band(cls, user_id, band_data):
try:
database = ArangoCore.get_database()
collections = ACTIVITY_COLLECTIONS
collections += [ArangoVertex.BAND, ArangoEdge.USER_FOLLOW]
with database.transaction(write=collections,
commit_on_error=False) as transaction:
# Remove relation between 2 user
_key = '{0}-{1}'.format(user_id, band_data['user_id'])
ArangoCore.delete_edge_from_collection(ArangoEdge.USER_FOLLOW,
_key)
# Update band data
cls.update_band(band_data['user_id'],
band_data['follow_count'], transaction)
transaction.commit()
except Exception as exception:
raise exception
