Relationships .remove not working because of LazyNode

[tonjo]

Relationship .remove works ONLY when related node is just created, not when recalling a previously defined one. (That's why unit test don't fail)

I consider it a crucial issue.

Inside the remove method, the problem is rels_by_node[obj.node] returns []
because when the node "obj" is recalled through get or get_or_create,
obj.node is a neo4jrestclient.client.LazyNode, not a neo4jrestclient.client.Node.
When it is created it's a Node instead.

Creating a node:

n=Person(name='nick')
n.id
50
type(n)
<class 'neo4jrestclient.client.Node'>
n.friendTo.add(someone)
n.save()
Trying manually, rels_by_node[n] gives something:
[<Neo4j Relationship: http://localhost:7474/db/data/relationship/89>]

But when I search for the very same Node:

b=Person.objects.get(id=50)
type(b.node)
<class 'neo4django.db.models.script_utils.LazyNode'>
and
rels_by_node[n.node]
[]

Printing out rels_by_node:

key: < Neo4j Node: http://localhost:7474/db/data/node/50 >
value: [ < Neo4j Relationship: http://localhost:7474/db/data/relationship/89 > ]
key: < Neo4j Node: http://localhost:7474/db/data/node/44 >
value: [ < Neo4j Relationship: http://localhost:7474/db/data/relationship/79 > ]
key: < Neo4j LazyNode: http://localhost:7474/db/data/node/50 >
value: []

The FIRST row is the one giving the relationship, but is the last one found,
because of LazyNode.

From row 730 in relationships.py:
for obj in objs:
candidate_rels = rels_by_node[obj.node] if hasattr(obj, 'node') else []
# It will be empty if obj.node is LazyNode
if candidate_rels:
# always False, and then an exception raises when trying to remove
# from self._added which is empty.

I wish I can help more, but I'm not sure what a LazyNode is ;)
I don't know exactly where to touch.

[Matt Luongo]

Good catch. neo4django.db.models.script_utils.LazyNode is a subclass of neo4jrestclient's Node that only pulls data from its initial representation, instead of every time a property is read. I'll try to look into this soon.

[Pierre Romera Zhang]

Any news about this ?

Cheers

[tonjo]

Hi, I Just came back, I hope in a few days I will have some time.
Thanks for the patience.
Il giorno 01/ago/2013 18:31, "Pierre Romera" [e-mail] ha
scritto:

Any news about this ?

Cheers

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