Synnefo

from django.db.models import (Model, BigIntegerField, CharField, DateTimeField,

                              ForeignKey, AutoField)

class Holding(Model):

    usage_min = intDecimalField(default=0)

    usage_max = intDecimalField(default=0)

    class Meta:

        unique_together = (('holder', 'source', 'resource'),)

    clientkey = CharField(max_length=4096, null=False)

    issue_datetime = DateTimeField()

class Provision(Model):

    quantity = intDecimalField()

    def todict(self):

        return {'holder':   self.holder,

                'source':   self.source,

    usage_max = intDecimalField()

    delta_quantity = intDecimalField()

    reason = CharField(max_length=4096)