[英]Neo4j Py2neo not updating node properties
Writing python program to fetch existing Neo4j
node and update properties using py2neov3 package
. 编写python程序来获取现有的
Neo4j
节点并使用py2neov3 package
更新属性。
Movie node has title & year properties. 电影节点具有标题和年份属性。 Have a python dictionary with list of movies to be added.
有一个带有要添加电影列表的python字典。
I have tried below options, movie node is getting added. 我尝试了以下选项,正在添加电影节点。 But year property is not updated.
但是年份属性未更新。
Option#1: Use Py2neo OGM. 选项1:使用Py2neo OGM。 Start transaction, create Movie object, populate title, invoke merge, populate year, invoke push, finally commit
开始交易,创建Movie对象,填充标题,调用合并,填充年份,调用push,最后提交
Option#2: Instead of OGM (Commented code below), use Node function, invoke merge and push. 选项2:使用Node函数而不是OGM(下面的注释代码),调用merge和push。
I have done with above mentioned options, but it didn't work for me. 我已经完成了上面提到的选项,但是对我来说不起作用。 Python version 3.5.2
Python版本3.5.2
Code: 码:
try:
tx = gdb.begin() ##gdb is Graph object
for x in moviedict.keys():
m1 = Movie()
m1.title = moviedict[x]['title']
tx.merge(m1)
m1.year = moviedict[x]['year']
tx.graph.push(m1)
tx.commit()
"""Option2 for x in moviedict.keys():
m1 = Node('Movie',title=moviedict[x]['title'])
gdb.merge(m1)
m1['year'] = moviedict[x]['year']
gdb.push(m1)
"""
Can anyone help me on this issue? 有人可以帮我解决这个问题吗?
Your help is much appreciated. 非常感谢您的帮助。
Best Regards. 最好的祝福。
I didn't use dictionaries, because I wanted the example to be both short and runnable 我不使用字典,因为我希望示例既简短又可运行
import py2neo
import py2neo.ogm
from py2neo import Graph
from py2neo.ogm import GraphObject, Property
class Movie(GraphObject):
__primarykey__ = "title"
title = Property()
released = Property()
def authenticateAndConnect():
py2neo.authenticate('localhost:7474', 'user', 'password')
return Graph('http://localhost:7474/default.graphdb/data/')
def foo():
graph = authenticateAndConnect()
movie = Movie.select(graph).where("_.title = 'The Matrix Reloaded'").first()
movie.released = 2017
graph.push(movie)
if __name__ == '__main__':
foo()
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