models.py 1.86 KB
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import datetime
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from django.db import DJANGO_VERSION_PICKLE_KEY, models
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from django.utils import six
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from django.utils.translation import ugettext_lazy as _

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def standalone_number():
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    return 1

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class Numbers(object):
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    @staticmethod
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    def get_static_number():
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        return 2
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class PreviousDjangoVersionQuerySet(models.QuerySet):
    def __getstate__(self):
        state = super(PreviousDjangoVersionQuerySet, self).__getstate__()
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        state[DJANGO_VERSION_PICKLE_KEY] = '1.0'
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        return state


class MissingDjangoVersionQuerySet(models.QuerySet):
    def __getstate__(self):
        state = super(MissingDjangoVersionQuerySet, self).__getstate__()
        del state[DJANGO_VERSION_PICKLE_KEY]
        return state


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class Group(models.Model):
    name = models.CharField(_('name'), max_length=100)
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    objects = models.Manager()
    previous_django_version_objects = PreviousDjangoVersionQuerySet.as_manager()
    missing_django_version_objects = MissingDjangoVersionQuerySet.as_manager()
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class Event(models.Model):
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    title = models.CharField(max_length=100)
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    group = models.ForeignKey(Group, models.CASCADE)
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class Happening(models.Model):
    when = models.DateTimeField(blank=True, default=datetime.datetime.now)
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    name = models.CharField(blank=True, max_length=100, default="test")
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    number1 = models.IntegerField(blank=True, default=standalone_number)
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    if six.PY3:
        # default serializable on Python 3 only
        number2 = models.IntegerField(blank=True, default=Numbers.get_static_number)
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class Container(object):
    # To test pickling we need a class that isn't defined on module, but
    # is still available from app-cache. So, the Container class moves
    # SomeModel outside of module level
    class SomeModel(models.Model):
        somefield = models.IntegerField()

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class M2MModel(models.Model):
    groups = models.ManyToManyField(Group)