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from __future__ import unicode_literals
from django.conf import settings
from django.contrib.admin.utils import quote
from django.contrib.contenttypes.models import ContentType
from django.core.urlresolvers import NoReverseMatch, reverse
from django.db import models
from django.utils.encoding import python_2_unicode_compatible, smart_text
from django.utils.translation import ugettext, ugettext_lazy as _
ADDITION = 1
CHANGE = 2
DELETION = 3
class LogEntryManager(models.Manager):
use_in_migrations = True
def log_action(self, user_id, content_type_id, object_id, object_repr, action_flag, change_message=''):
e = self.model(
None, None, user_id, content_type_id, smart_text(object_id),
object_repr[:200], action_flag, change_message
)
e.save()
@python_2_unicode_compatible
class LogEntry(models.Model):
action_time = models.DateTimeField(_('action time'), auto_now=True)
user = models.ForeignKey(settings.AUTH_USER_MODEL)
content_type = models.ForeignKey(ContentType, blank=True, null=True)
object_id = models.TextField(_('object id'), blank=True, null=True)
object_repr = models.CharField(_('object repr'), max_length=200)
action_flag = models.PositiveSmallIntegerField(_('action flag'))
change_message = models.TextField(_('change message'), blank=True)
objects = LogEntryManager()
class Meta:
verbose_name = _('log entry')
verbose_name_plural = _('log entries')
db_table = 'django_admin_log'
ordering = ('-action_time',)
def __repr__(self):
return smart_text(self.action_time)
def __str__(self):
if self.action_flag == ADDITION:
return ugettext('Added "%(object)s".') % {'object': self.object_repr}
elif self.action_flag == CHANGE:
return ugettext('Changed "%(object)s" - %(changes)s') % {
'object': self.object_repr,
'changes': self.change_message,
}
elif self.action_flag == DELETION:
return ugettext('Deleted "%(object)s."') % {'object': self.object_repr}
return ugettext('LogEntry Object')
def is_addition(self):
return self.action_flag == ADDITION
def is_change(self):
return self.action_flag == CHANGE
def is_deletion(self):
return self.action_flag == DELETION
def get_edited_object(self):
"Returns the edited object represented by this log entry"
return self.content_type.get_object_for_this_type(pk=self.object_id)
def get_admin_url(self):
"""
Returns the admin URL to edit the object represented by this log entry.
This is relative to the Django admin index page.
"""
if self.content_type and self.object_id:
url_name = 'admin:%s_%s_change' % (self.content_type.app_label, self.content_type.model)
try:
return reverse(url_name, args=(quote(self.object_id),))
except NoReverseMatch:
pass
return None
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