This doesn't work (from the tutorial page)... any ideas where I'm going wrong?
Thanks...
import neo4j
from neo4j.util import Subreference
graphdb = neo4j.GraphDatabase( "test_neo4j_db" )
class SubCategoryProducts(neo4j.Traversal):
types = [neo4j.Outgoing.SUBCATEGORY, neo4j.Outgoing.PRODUCT]
def isReturnable(self, pos):
if pos.is_start: return False
return pos.last_relationship.type == 'PRODUCT'
def attributes(product_node):
for category in categories(product_node):
for attr in category.ATTRIBUTE:
yield attr
class categories(neo4j.Traversal):
types = [neo4j.Incoming.PRODUCT, neo4j.Incoming.SUBCATEGORY]
def isReturnable(self, pos):
return not pos.is_start
with graphdb.transaction:
attribute_subref_node = Subreference.Node.ATTRIBUTE_ROOT(graphdb)
#attribute_subref_node.ATTRIBUTE_TYPE("Price") #Fails, do I need to
pass an object?
#attribute_subref_node.ATTRIBUTE_TYPE("Length")
#attribute_subref_node.ATTRIBUTE_TYPE("Name")
category_subref_node = Subreference.Node.CATEGORY_ROOT(graphdb,
Name="Products")
computers_node = graphdb.node(Name="Computers")
#create some categories
electronics_node = graphdb.node(Name="Laptops")
electronics_node.SUBCATEGORY(computers_node)
netbooks_node = graphdb.node(Name="Netbooks")
netbooks_node.SUBCATEGORY(computers_node)
desktops_node = graphdb.node(Name="Netbooks")
desktops_node.SUBCATEGORY(computers_node)
#create some products
little_dell = graphdb.node(Name="Little Dell", Colour="red", Price=210)
little_dell.is_a( netbooks_node )
print little_dell.id
little_acer = graphdb.node(Name="Little Acer", Colour="grey")
little_acer.is_a( netbooks_node )
print little_acer.id
little_eee = graphdb.node(Name="Little EEE", Colour="white", Price=200 )
little_eee.is_a( netbooks_node )
print little_eee.id
for rel in computers_node.SUBCATEGORY.outgoing:
print rel.end['Name']
for prod in SubCategoryProducts(computers_node):
print prod['Name']
for attr in attributes(prod):
print attr['Name'], " of type ", attr.end['Name']
print
graphdb.shutdown()
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