How to bulk upload in appengine with reference field ?

Question

Hi,

I want to bulk upload data for following entity:

class Person(db.Model):
    name  = db.StringProperty(required=True)
    type  = db.StringProperty(required=True)
    refer = db.SelfReferenceProperty()

What is best way to load this data into appspot ?

Thanks,

Answer 1

As I assume you are creating object for each entity and the put it in some king of queue that proceed them one by one(or by groups of X). Can`t you just create key object from the reference key(if you have it like string)?

Answer 2

Presumably your data already has some sort of natural key - or it couldn't include a self reference property. Use generate_key to specify a key name for each loaded entity, and a lambda function for the 'refer' field to generate a key that references the appropriate entity.