在Django中使用Neo4j

      重要的先说在前面吧，最后的选型结构是安装了最新的neo4j版本3.0.3，使用了neo4j-rest-client客户端库。主要原因是更适用于django的neomodel库目前只支持neo4j2.2.

     来自官方的文档--Using Neo4j from Python：https://neo4j.com/developer/python/   这篇官方文档为Django开发推荐NeoModel(http://neomodel.readthedocs.io/en/latest/)。另外这个文档的末尾有多篇推荐阅读，会列在最后:

     neo4j在debian系上的安装：http://debian.neo4j.org/?_ga=1.23681983.403762323.1467875632

     安装命令可能遇到以下错误：

The following packages have unmet dependencies:
 neo4j : Depends: java8-runtime but it is not installable or
                  j2re1.8 but it is not installable
E: Unable to correct problems, you have held broken packages.

采用以下命令解决以上问题：

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer

上面是安装官方JDK，也可以安装OpenJDK：

sudo add-apt-repository ppa:openjdk-r/ppa
sudo apt-get update
sudo apt-get install openjdk-8-jdk
sudo update-alternatives --config java
sudo update-alternatives --config javac

安装以后启动失败提示：

Setting up neo4j (2.2.10) ...
 System start/stop links for /etc/init.d/neo4j-service already exist.
Starting Neo4j Server...WARNING: not changing user
process [6234]... waiting for server to be ready.. Failed to start within 120 seconds.
Neo4j Server may have failed to start, please check the logs.

StackOverflow(http://stackoverflow.com/questions/28995662/what-does-warning-not-changing-user-mean-in-neo4j)提示

sudo su

切换成root用户做操作就Ok了。

安装时出现问题如下：

The following actions will resolve these dependencies:

     Keep the following packages at their current version:
1)     neo4j [Not Installed]
2)     oracle-java9-installer [Not Installed]

可以把安装指令改为

apt-get -f install neo4j

Neo4j官方文档入口：

http://neo4j.com/docs/

The Neo4j Manual v2.2.10：http://neo4j.com/docs/2.2.10/
Neo4j Cypher Refcard 2.2.10：http://neo4j.com/docs/2.2.10/cypher-refcard/
Neo4j Bolt Driver for Python：http://neo4j.com/docs/api/python-driver/current/
The Neo4j Java Developer Reference v3.0：http://neo4j.com/docs/Java-reference/current/
The Neo4j REST API documentation v3.0:http://neo4j.com/docs/rest-docs/current/
Neo4j OGM - An Object Graph Mapping Library for Neo4j:http://neo4j.com/docs/ogm-manual/current/
The Neo4j Operations Manual v3.0:http://neo4j.com/docs/operations-manual/current/
Neo4j Cypher Refcard 3.0.3:http://neo4j.com/docs/cypher-refcard/current/
Neo4jBooks:https://neo4j.com/books/

官方文档Using Neo4j from Python的推荐阅读：

Using Neo4j from Python
Using Neo4j from Kivy
A script to automatically migrate relational databases to Neo4J
Py2neo Spatial
Holger Spill: An introduction to Python and graph databases with Neo4j
Python NLTK/Neo4j: Analysing the transcripts of How I Met Your Mother
Flask and Neo4j
Using Jupyter and Neo4j with Docker
Neo4j Jupyter Visualization Notebook

一些中文参考资料：

图形数据库 Neo4j 开发实战:http://www.ibm.com/developerworks/cn/java/j-lo-neo4j/index.html
neo4j使用指南(官方文档概要):http://blog.csdn.NET/gtuu0123/article/details/6384375
图形数据库、NOSQL和Neo4j:http://www.infoq.com/cn/articles/graph-nosql-neo4j
图数据库实践系列:http://www.linuxidc.com/Linux/2013-08/88766.htm
spring Data Neo4j简介:http://www.infoq.com/cn/news/2013/11/spring-data-neo4j-intro
Neo4J High Availability 设置向导:http://www.68idc.cn/help/mobilesys/J2ME/20150730468082.html

Neo4j集群安装实践:http://blog.fens.me/nosql-neo4j-intro/

参考资料：https://github.com/neo4j/neo4j/issues/7031

http://www.webupd8.org/2012/09/install-Oracle-java-8-in-ubuntu-via-ppa.html