def delete_graph(graph):
'''delete a graph'''
dsrc = data_source.get_instance()
graph_tbl = graphs_table.GraphsTable.get_instance()
node_tbl = nodes_table.NodesTable.get_instance()
arc_tbl = arcs_table.ArcsTable.get_instance()
dsrc.begin_transaction()
graph.root_id = 'NULL'
graph = graph_tbl.update(graph)
nodes = node_tbl.get(graph_id=graph.oid)
for node in nodes:
arcs = arc_tbl.get(head_id=node.oid)
for arc in arcs:
arc_tbl.delete(oid=arc.oid)
arcs = arc_tbl.get(tail_id=node.oid)
for arc in arcs:
arc_tbl.delete(oid=arc.oid)
node_tbl.delete(oid=node.oid)
graph_tbl.delete(oid=graph.oid)
dsrc.end_transaction()
def __init__(self):
self.s_tbl = sessions_table.SessionsTable()
self.cfg = config.Config.get_instance()
self.dsrc = data_source.get_instance()
