CODEWITHSUNDEEP
pythongoogle-app-enginegoogle-cloud-datastore
fread2281
fread2281

Reputation: 1136

Per-kind namespace

I have a project that will need data to be separated.

There will be multiple 'systems' that will be implemented. Each will be based on a general model. To have this in the GAE datastore, I could use a prefix: 4EClass, 3EClass and PthClass. I would rather use the namespaces for this as it seems to be cleaner.

I would like to be able to set a namespace in the kind's subclass:

class Class(db.Model):
    namespace = '4E'

Is there a way to get put, query, etc to work with these namespaces preferably without having to do Class.query(namespace=Class.namespace) or the like?

Upvotes: 0

Views: 87

Answers (2)

Nick Johnson
Nick Johnson

Reputation: 101149

Using namespaces for this does not make a great deal of sense - namespaces are orthogonal to model classes.

Instead, you can specify a kind name independently of the class name:

class MyModel(db.Model):
  @classmethod
  def kind(cls):
    return "MyModel_Foo"

Upvotes: 1

aschmid00
aschmid00

Reputation: 7158

i think what you are looking for are polymodels. here with ndb: https://developers.google.com/appengine/docs/python/ndb/polymodelclass
or db: https://developers.google.com/appengine/docs/python/datastore/polymodelclass

and i also would suggest you to use ndb instead of the db package. https://developers.google.com/appengine/docs/python/datastore/polymodelclass

Upvotes: 0

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