I don't think that the cypher run method returns a node in the first place. It returns a result object which you have to access to get its content.
I'm not that well versed in py2neo, there might be other issues in the code example. Michael Von meinem iPhone gesendet > Am 11.09.2016 um 04:48 schrieb Jeff Bradbury <[email protected]>: > > Hello, > I'm trying to create a database with nodes (A)-(B)-(C) and later add node (D) > and connect it to (C). Unfortunately, on the second run my code creates > creates (D), a new node ( ) that I wasn't expecting, and connects them. The > first time my code is run it clears out the database and create nodes A,B, > and C, and their relationships. The second time it is run it creates the new > ( ) node and (D), and a relationship between them. I was expecting a result > of (A)-(B)-(C)-(D), but I'm getting (A)-(B)-(C) and ( )-(D). > > Any help would be greatly appreciated! Thank you! > > from py2neo import Graph, Node, Relationship > session = Graph("bolt://localhost") > neo4j = session.begin() > > # Check for Node C > existing_node = neo4j.run("MATCH (n) WHERE n.name=\"NODE_C\" RETURN n") > > if existing_node: > print('Node Exists') > # Create Node D > neo_data_d = Node("NODE_D", name="NODE_D") > neo4j.create(neo_data_d) > # Create Relationship > rel = Relationship(existing_node, "REL", neo_data_d) > neo4j.create(rel) > neo4j.commit() > else: > print('Node Does Not Exist') > # Wipe Database > session.delete_all() > # Create Nodes A,B,C > neo_data_a = Node("NODE_A", name="NODE_A") > neo4j.create(neo_data_a) > neo_data_b = Node("NODE_B", name="NODE_B") > neo4j.create(neo_data_b) > neo_data_c = Node("NODE_C", name="NODE_C") > neo4j.create(neo_data_c) > # Create Relationships A-B-C > rel = Relationship(neo_data_a, "REL", neo_data_b) > neo4j.create(rel) > rel = Relationship(neo_data_b, "REL", neo_data_c) > neo4j.create(rel) > neo4j.commit() > -- > You received this message because you are subscribed to the Google Groups > "Neo4j" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
