1 from django.db import models

     2 from django.contrib.contenttypes.models import ContentType

     3 from django.contrib.auth.models import User

     4 from django.contrib.admin.util import quote

     5 from django.utils.translation import ugettext_lazy as _

     6 from django.utils.encoding import smart_unicode

     7 from django.utils.safestring import mark_safe

     8 

     9 ADDITION = 1

    10 CHANGE = 2

    11 DELETION = 3

    12 

    13 class LogEntryManager(models.Manager):

    14     def log_action(self, user_id, content_type_id, object_id, object_repr, action_flag, change_message=''):

    15         e = self.model(None, None, user_id, content_type_id, smart_unicode(object_id), object_repr[:200], action_flag, change_message)

    16         e.save()

    17 

    18 class LogEntry(models.Model):

    19     action_time = models.DateTimeField(_('action time'), auto_now=True)

    20     user = models.ForeignKey(User)

    21     content_type = models.ForeignKey(ContentType, blank=True, null=True)

    22     object_id = models.TextField(_('object id'), blank=True, null=True)

    23     object_repr = models.CharField(_('object repr'), max_length=200)

    24     action_flag = models.PositiveSmallIntegerField(_('action flag'))

    25     change_message = models.TextField(_('change message'), blank=True)

    26     objects = LogEntryManager()

    27     class Meta:

    28         verbose_name = _('log entry')

    29         verbose_name_plural = _('log entries')

    30         db_table = 'django_admin_log'

    31         ordering = ('-action_time',)

    32 

    33     def __repr__(self):

    34         return smart_unicode(self.action_time)

    35 

    36     def is_addition(self):

    37         return self.action_flag == ADDITION

    38 

    39     def is_change(self):

    40         return self.action_flag == CHANGE

    41 

    42     def is_deletion(self):

    43         return self.action_flag == DELETION

    44 

    45     def get_edited_object(self):

    46         "Returns the edited object represented by this log entry"

    47         return self.content_type.get_object_for_this_type(pk=self.object_id)

    48 

    49     def get_admin_url(self):

    50         """

    51         Returns the admin URL to edit the object represented by this log entry.

    52         This is relative to the Django admin index page.

    53         """

    54         return mark_safe(u"%s/%s/%s/" % (self.content_type.app_label, self.content_type.model, quote(self.object_id)))