# Django 1.8.18.dev20170123152445 documentation

# Source code for django.contrib.admin.models

    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.
            """
            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