Neo4j

About Python Environment

I have created a python environment neo4j where all the required modules are installed. So before running any python file you need to activate this environment

# To activate the environment
source neo4j/bin/activate

# To deactivate the environment
deactivate

About The Files

myQueryExample.cypher

It contain some example of cypher queries

load_database.cypher

It contain cypher queries for loading the database

<!-- copy and paste queries and then run to execute them -->

load_database.py

It contain a class which handle all the loading part of database using neo4j module It provide following features:

• It connect to Neo4j Database
• We can run time change database folder
• Load Database
• Delete Whole Database
• Count the number of nodes
• Can generate statements for any type of data, we just need to provide data with header

main.py

It uses load_database.py file for doing many things. It just like an application.

# <database folder> = Path to database in which all the .csv file exists

python main.py <database folder>

other load_*.py

They also uses load_database.py file for loading database but in distributed way. Like just upload particular number of elements from a particular numbers

# For following files only
# load_nodes.py
# load_fields.py
# load_taxonomy_terms.py
# load_field_collection_items.py

# <filename> = any above file
# <database folder> = Path to database in which all the .csv file exists
# <start with> = integer which tell from where to start the loading
# <max count> = Which tell how many items/rows/nodes/etc are to be loaded

python <filename> <Database Folder> <start with> <max count>

About Neo4j

If you want to import data from csv file then do following changes in neo4j.config file dbms.security.allow_csv_import_from_file_urls=true => UNCOMMENT IT dbms.directories.import=import => COMMENT IT

Installing APOC

1. create a folder <NEO4J_HOME>/plugins
2. Download .jar file with the same version as your neo4j in <NEO4J_HOME>/plugins folder
3. change the following in the file

Backup your database backup: Copy <NEO4J_HOME>/data/databases/graph.db folder restore: replace <NEO4J_HOME>/data/databases/graph.db with your back *.db folder