Question

您好我无法连接到端口7687上的localhost - 服务器正在运行吗？我的python代码执行时出错

import os
import json
from urllib.parse import urlparse, urlunparse

from django.shortcuts import render

# Create your views here.
from py2neo import Graph, authenticate
from bottle import get,run,request,response,static_file
from py2neo.packages import neo4j

url = urlparse(os.environ.get("GRAPHENEDB_GOLD_URL"))
url_without_auth = urlunparse((url.scheme, ("{0}:{1}").format(url.hostname, url.port), '', None, None, None))
user = url.username
password = url.password
authenticate(url_without_auth,user, password)
graph = Graph(url_without_auth, bolt = False)

#graph = Graph(password='vjsj56@vb')


@get("/")
def get_index():
    return static_file("index.html", root="static")


@get("/graph")
def get_graph(self):
    print("i was here" )
    print("graph start")
    results = graph.run(
        "MATCH (m:Movie)<-[:ACTED_IN]-(a:Person) "
        "RETURN m.title as movie, collect(a.name) as cast "
        "LIMIT {limit}", {"limit": 10})
    print("graph run the run")
    nodes = []
    rels = []
    i = 0
    for movie, cast in results:
        #print("i am here")
        nodes.append({"title": movie, "label": "movie"})
        target = i
        i += 1
        for name in cast:
            print(name)
            actor = {"title": name, "label": "actor"}
            try:
                source = nodes.index(actor)
            except ValueError:
                nodes.append(actor)
                source = i
                i += 1
            rels.append({"source": source, "target": target})
    return {"nodes": nodes, "links": rels}


@get("/search")
def get_search():
    try:
        q = request.query["q"]
    except KeyError:
        return []
    else:
        results = graph.run(
            "MATCH (movie:Movie) "
            "WHERE movie.title =~ {title} "
            "RETURN movie", {"title": "(?i).*" + q + ".*"})
        response.content_type = "application/json"
        return json.dumps([{"movie": dict(row["movie"])} for row in results])


@get("/movie/<title>")
def get_movie(title):
    results = graph.run(
        "MATCH (movie:Movie {title:{title}}) "
        "OPTIONAL MATCH (movie)<-[r]-(person:Person) "
        "RETURN movie.title as title,"
        "collect([person.name, head(split(lower(type(r)),'_')), r.roles]) as cast "
        "LIMIT 1", {"title": title})
    row = results.next()
    return {"title": row["title"],
            "cast": [dict(zip(("name", "job", "role"), member)) for member in row["cast"]]}

此代码在我的本地syatem上正常运行，但在heroku和graphenedb上部署时出现连接错误

异常位置：/app/.heroku/python/lib/python3.6/site-packages/py2neo/packages/neo4j/v1/connection.py in connect，第387行

Answer 1

我来自GrapheneDB的Juanjo。

乍一看，代码看起来很好，错误代码指向错误的URL。它可能是环境变量的问题。你能检查一下你的GRAPHENEDB_GOLD_URL变量吗？

你可以这样做：

$ heroku config:get GRAPHENEDB_GOLD_URL

应该是这样的：

http://<user>:<pass>@XXX.graphenedb.com:24789/db/data

（请不要在此分享您的网址）

如果您的变量为空，请在检索GrapheneDB环境变量时阅读更多here。

如果这不是您的问题，或问题仍然存在，您能否通过我们的管理面板上的支持链接与我们联系？ Heroku团队会将支持票转发给我们，我们会将与您的数据库相关的所有信息都注入到票证中。

谢谢，

Juanjo

在heroku上托管的Graphenedb的连接错误

1 个答案: