jumpserver/apps/common/utils/django.py

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2019-02-27 00:45:00 +00:00
# -*- coding: utf-8 -*-
#
import re
from django.shortcuts import reverse as dj_reverse
from django.db.models import Subquery, QuerySet
2019-02-27 00:45:00 +00:00
from django.conf import settings
from django.utils import timezone
UUID_PATTERN = re.compile(r'[0-9a-zA-Z\-]{36}')
def reverse(view_name, urlconf=None, args=None, kwargs=None,
current_app=None, external=False):
url = dj_reverse(view_name, urlconf=urlconf, args=args,
kwargs=kwargs, current_app=current_app)
if external:
site_url = settings.SITE_URL
url = site_url.strip('/') + url
return url
def get_object_or_none(model, **kwargs):
try:
obj = model.objects.get(**kwargs)
except model.DoesNotExist:
return None
return obj
def date_expired_default():
try:
years = int(settings.DEFAULT_EXPIRED_YEARS)
except TypeError:
years = 70
return timezone.now() + timezone.timedelta(days=365*years)
def union_queryset(*args, base_queryset=None):
if len(args) == 1:
return args[0]
elif len(args) == 0:
raise ValueError("args is empty")
args = [q.order_by() for q in args]
sub_query = args[0].union(*args[1:])
queryset_id = list(sub_query.values_list('id', flat=True))
if not base_queryset:
base_queryset = args[0].model.objects
queryset = base_queryset.filter(id__in=queryset_id)
return queryset