向通过 py2neo 提示连接的图形添加了一个节点，但 MATCH (n) RETURN (n) 在 Neo4j 浏览器中显示空图形

Question

I am moving the first steps with py2neo.

I have created a graph via Neo4j Desktop

DBMS Name: Neo4j

password: Neo4j

and I have started it. Then I opened it with Neo4j browser, where it shows I am connected as user neo4j to bolt://localhost:7687 .

Then, I connected to it from my prompt by typing

graph = Graph("bolt://localhost:7687", user="neo4j", password="Neo4j")

>>> graph
Graph('bolt://neo4j@localhost:7687')

I created a node

nicole = Node("person", name="Nicole", age=24)

>>> nicole
Node('person', age=24, name='Nicole')

and then I in my Neo4j browser, I expect to see my node if I type the query:

MATCH (n) RETURN (n)

But it returns nothing.

1. Why?

2. Also, if in my Chrome browser URL Bar I type http://localhost:7474/ , it returns the same view of the Neo4j browser ( MATCH (n) RETURN (n) does not work even here )

but if in my Chrome browser URL Bar I type http://localhost:7687/ , it returns a void window with just the message

not a WebSocket handshake request: missing upgrade

Why I don't get a Neo4j-browser-like view even in this second case?

Answer 1

Your code simply creates a local node. To create it in the graph, use:

graph.create(nicole)

Then it will appear in your browser query.

Answer 2

As mentioned in the comments, you need to use the graph.create() to save the object in the database.

graph = Graph("bolt://localhost:7687", user="neo4j", password="Neo4j")

>>> graph
Graph('bolt://neo4j@localhost:7687')
nicole = Node("person", name="Nicole", age=24)

>>> nicole
Node('person', age=24, name='Nicole')

>>> graph.create(nicole)

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