Feature: add support to pass relationship properties to get_or_create and create_or_update batch operations

[Wenzel]

Hi,

I'm using get_or_create() class method to bulk create a set of nodes.

However, I also would like to pass additional relationship properties as well, like a date for example:

class PetsRel(StructuredRel):
    date = StringProperty()

class Dog(StructuredNode):
    name = StringProperty(required=True)
    owner = RelationshipTo('Person', 'owner')

class Person(StructuredNode):
    name = StringProperty(unique_index=True)
    pets = RelationshipFrom('Dog', 'owner', model=PetsRel)

bob = Person.get_or_create({"name": "Bob"})[0]
bobs_gizmo = Dog.get_or_create({"name": "Gizmo"}, relationship=bob.pets, rel_props=({"date": '01-01-2015"}))

What do you think ?

If we compare with py2neo, they separated the bulk operations into 2 functions:

• merge nodes
• merge relationships

Could you add support for that in the future ?

Bulb node insertion and merging is super useful, especially with a high-level OGM like Neomode.

Thanks for the support !

[Enprogames]

This would be awesome. In my project, I'll either need to use raw cypher queries or switch to py2neo.ogm, but this would have been great to have.

[holyoaks]

I would request that ALL batch actions (create and create_or_update in addition to get_or_create) support this. My use case is a batch insert/update into Postgresql, followed by a batch insert/update into Neo4j, but as soon as I need to establish relationships, I can no longer operate in batch, but must loop through each Neo4j Node instance and set the relationships. I'm relatively new to Neo4j, so I don't know if there's a performance hit (Postgres is much slower issuing individual statements than a bulk insert/update), but if nothing else, it will be cleaner and more comprehensible code, IMO. Thanks!