mhluongo’s gists

mhluongo / gist:4645421

Last active December 11, 2015 18:58

A quick bit of Cypher demonstrating how you can change the default null-ordering in ORDER BY. Note that the trick is in the null predicate and STR cast.

	START n=node({startId})
	MATCH (n)-[?:DID]->(thing)
	WITH thing, (thing.year? = null) AS year_is_null
	WITH thing, STR(year_is_null) as null_year
	ORDER BY null_year, thing.year? DESC
	RETURN thing, thing.year? as year

mhluongo / gist:4637988

Created January 25, 2013 21:20

	import neo4django
	from neo4django.db import models

	class Preceding(models.NodeModel):
	precedes_events = model.Relationship('Condition',reltype=neo4django.Outgoing.PRECEDES_CONDITION)
	precedes_conditions = model.Relationship('Event', reltype=neo4django.Outgoing.PRECEDES_EVENT)

	class Event(Preceding):
	pass

mhluongo / gist:4524548

Created January 13, 2013 15:16

One approach to integrating neo4django and django.contrib.auth.

	from neo4django.db import models

	class BlogPost(models.NodeModel):
	def __init__(self, user, contents):
	self.by_user = user.id
	self.contents = contents

	by_user = models.IntegerProperty(indexed=True)
	contents = models.StringProperty()

mhluongo / gist:4399621

Created December 28, 2012 16:52

A pymaps extension that exposes maps globally in Javascript.

	from pymaps import PyMap

	class MyPyMap(PyMap):
	#old-style classes, unfortunately
	def _mapjs(self, map):
	super_js = PyMap._mapjs(self, map)
	return super_js + 'PyMaps.push(%s);\n' % map.id

	def _buildmaps(self):
	super_js = PyMap._buildmaps(self)

mhluongo / gist:4199327

Created December 4, 2012 00:22

A quick orcid-python example.

	>>> import orcid
	>>> cs_authors = orcid.search('computer science')
	>>> print cs_authors.next()
	<Author Olga Zhelenkova, ORCID 0000-0003-0028-2469>

mhluongo / gist:4009325

Created November 3, 2012 23:37

another neo4django relational filtering workaround

	# a hack for pete.groups.filter(created_date__gt = datetime.date(2012,1,1), type__type = "Chess Club")

	import datetime
	import neo4django
	from neo4django.db import models

	class Person(models.NodeModel):
	auto_id = models.AutoProperty(indexed=True)
	groups = models.Relationship('Group', related_name='people',
	rel_type=neo4django.Outgoing.MEMBER_OF)

mhluongo / gist:3251313

Created August 3, 2012 20:39

Attempt to replicate http://travis-ci.org/#!/mhluongo/neo4django/jobs/2013936 using the travis-php box.

	vagrant@nettuno:~$ cd ~/builds
	vagrant@nettuno:~/builds$ export TRAVIS_PULL_REQUEST=false
	vagrant@nettuno:~/builds$ export TRAVIS_SECURE_ENV_VARS=false
	vagrant@nettuno:~/builds$ export NEO4J_VERSION="1.6.3"
	vagrant@nettuno:~/builds$ git clone --depth=100 --quiet git://github.com/mhluongo/neo4django.git mhluongo/neo4django
	vagrant@nettuno:~/builds$ cd mhluongo/neo4django
	vagrant@nettuno:~/builds/mhluongo/neo4django$ git checkout -qf 155c266129d2d587b39e5d7acff86b123c94dda7
	vagrant@nettuno:~/builds/mhluongo/neo4django$ export TRAVIS_PYTHON_VERSION=2.6
	vagrant@nettuno:~/builds/mhluongo/neo4django$ source ~/virtualenv/python2.6/bin/activate
	vagrant@nettuno:~/builds/mhluongo/neo4django$ python --version

mhluongo / gist:2988938

Created June 25, 2012 14:21

	from neo4django.db import models
	import neo4django

	class Concept(models.NodeModel):
	name = models.StringProperty(indexed=True)

	class ContainerConcept(Concept):
	class Meta:
	abstract = True

mhluongo / download_neo.sh

Created May 31, 2012 14:33

A bit of bash we use to download Neo and install the cleandb extension on development machines.

	#!/bin/bash

	VERSION='1.6'
	DIR="neo4j-community-$VERSION"
	FILE="$DIR-unix.tar.gz"
	SERVER_PROPERTIES_FILE="lib/neo4j/conf/neo4j-server.properties"

	if [[ ! -d lib/$DIR ]]; then
	wget http://dist.neo4j.org/$FILE
	tar xvfz $FILE &> /dev/null

mhluongo / gist:2628389

Created May 7, 2012 15:24

QuerySet relational filtering workaround (as of 5/7/2012. neo4django 03b247d7911753)

	# a hack for `NodeA.objects.filter(nodeb__in=nodebnodes)`

	from neo4django.db import connections
	from neo4django.db.models.script_utils import LazyNode

	# ...
	b_nodes = set([...]) #your NodeB instances
	b_node_ids = [b.id for b in b_nodes]

	type_node_a = NodeA._type_node()

Matt Luongo mhluongo