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Poor man unique constraints for Google Appengine NDB

Project description

Unique constraints for Google Appengine NDB

NDBUnq emulates unique constraints on Google Appengine Datastore using NDB hooks.

Example

There is full working example for Flask: https://github.com/vmihailenco/ndbunq-example/:

import ndbunq
from google.appengine.ext import ndb


class User(ndbunq.Model):
    username = ndb.StringProperty(required=True)

    class Meta:
        # username is guaranteed to be unique
        unique = (('username',),)

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