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Tags: 1.2+bzr1373+dfsg-0ubuntu1~12.04.4
https://launchpad.net/bugs/1039513
https://launchpad.net/bugs/1158425
* SECURITY UPDATE: failure to authenticate downloaded content (LP: #1039513)
  - debian/patches/CVE-2013-1058.patch: Authenticate downloaded files with
    GnuPG and MD5SUM files. Thanks to Julian Edwards.
  - CVE-2013-1058
* SECURITY UPDATE: configuration options may be loaded from current working
  directory (LP: #1158425)
  - debian/patches/CVE-2013-1057-1-2.patch: Do not load configuration
    options from the current working directory. Thanks to Julian Edwards.
  - CVE-2013-1057

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src/maasserver/models/timestampedmodel.py
 
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# Copyright 2012 Canonical Ltd.  This software is licensed under the
 
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# GNU Affero General Public License version 3 (see the file LICENSE).
 
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"""Model base class with creation/update timestamps."""
 
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from __future__ import (
 
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    absolute_import,
 
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    print_function,
 
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    unicode_literals,
 
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    )
 
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__metaclass__ = type
 
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__all__ = [
 
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    'TimestampedModel',
 
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    ]
 
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from django.db import connection
 
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from django.db.models import (
 
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    DateTimeField,
 
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    Model,
 
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    )
 
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from maasserver import DefaultMeta
 
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def now():
 
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    """Current database time (as per start of current transaction)."""
 
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    cursor = connection.cursor()
 
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    cursor.execute("select now()")
 
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    return cursor.fetchone()[0]
 
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class TimestampedModel(Model):
 
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    """Abstract base model with creation/update timestamps.
 
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    Timestamps are taken from the database transaction clock.
 
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    :ivar created: Object's creation time.
 
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    :ivar updated: Time of object's latest update.
 
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    """
 
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    class Meta(DefaultMeta):
 
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        abstract = True
 
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    created = DateTimeField(editable=False)
 
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    updated = DateTimeField(editable=False)
 
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    def save(self, *args, **kwargs):
 
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        current_time = now()
 
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        if self.id is None:
 
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            self.created = current_time
 
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        self.updated = current_time
 
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        return super(TimestampedModel, self).save(*args, **kwargs)