def get_nodes_and_edges(name='my_graph'):
graph = Graph(cleanup(name))
edges = []
for orm_node in Node.objects.select_related():
graph.add_node(get_node(orm_node.name))
for parent in orm_node.parent.iterator():
edges.append((cleanup(parent.parent.name),cleanup(parent.child.name)))
for child in orm_node.child.iterator():
edges.append((cleanup(child.parent.name),cleanup(child.child.name)))
edges = list(set(edges)) # remove duplicates
for edge in edges:
e = Edge(edge[0],edge[1])
e.set_target('_parent')
e.set_arrowhead('vee')
graph.add_edge(e)
return graph
