neo4j django-neomodel 配置过程中的错误

问题描述

我正在尝试使用 Neo4j 数据库在 Django 中做一个简单的项目。我已经安装了一个 django-neomodel 库，设置如下：

import os
from neomodel import config

db_username = os.environ.get('NEO4J_USERNAME')
db_password = os.environ.get('NEO4J_PASSWORD')

config.DATABASE_URL = f'bolt://{db_username}:{db_password}@localhost:7687'

创建模型：

class Task(Structurednode):
    id = UniqueIdproperty()
    title = Stringproperty()

将 'django_neomodel' 添加到 INSTALLED_APPS，删除了默认数据库配置，当我尝试进入该网站时，它会引发错误：ImproperlyConfigured at / settings.DATABASES is improperly configured. Please supply the ENGINE value. Check settings documentation for more details.。

这是唯一的错误，因为在运行 python manage.py install_labels 命令后它会引发：ServiceUnavailable("Failed to establish connection to {!r} (reason {})".format(resolved_address,error)) neo4j.exceptions.ServiceUnavailable: Failed to establish connection to IPv6Address(('::1',7687,0)) (reason [Errno 99] Cannot assign requested address)。

我很确定数据库工作正常，因为如您所见，我可以访问它。 screenshot

docker-compose:

version: "3.9"

services:
  api:
    container_name: mm_backend
    build:
      context: ./
      dockerfile: Dockerfile.dev
    command: pipenv run python manage.py runserver 0.0.0.0:8000
    volumes:
      - ./:/usr/src/mm_backend
    ports:
      - 8000:8000
    env_file: .env
    depends_on: 
      - db

  db:
    container_name: mm_db
    image: neo4j:4.1
    restart: unless-stopped
    ports:
      - "7474:7474"
      - "7687:7687"
    volumes:
      - ./db/data:/data
      - ./db/logs:/logs

解决方法

好吧，经过一番研究，我找到了这篇帖子 Docker-compose: db connection from web container to neo4j container using bolt，问题已经解决。