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.utils.translation import ugettext_lazy as _

     5 from django.utils.encoding import smart_unicode

     6 from django.utils.safestring import mark_safe

     7 

     8 ADDITION = 1

     9 CHANGE = 2

    10 DELETION = 3

    11 

    12 class LogEntryManager(models.Manager):

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

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

    15         e.save()

    16 

    17 class LogEntry(models.Model):

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

    19     user = models.ForeignKey(User)

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

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

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

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

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

    25     objects = LogEntryManager()

    26     class Meta:

    27         verbose_name = _('log entry')

    28         verbose_name_plural = _('log entries')

    29         db_table = 'django_admin_log'

    30         ordering = ('-action_time',)

    31 

    32     def __repr__(self):

    33         return smart_unicode(self.action_time)

    34 

    35     def is_addition(self):

    36         return self.action_flag == ADDITION

    37 

    38     def is_change(self):

    39         return self.action_flag == CHANGE

    40 

    41     def is_deletion(self):

    42         return self.action_flag == DELETION

    43 

    44     def get_edited_object(self):

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

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

    47 

    48     def get_admin_url(self):

    49         """

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

    51         This is relative to the Django admin index page.

    52         """

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