# Patchwork - automated patch tracking system

# Copyright (C) 2016 Intel Corporation

#

# This file is part of the Patchwork package.

#

# Patchwork is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# Patchwork is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with Patchwork; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

"""Compatibility wrappers for various Django versions."""

import django

from django.conf import settings

# render_to_string

#

# The render_to_string function no longer accepts the dictionary and

# context_instance parameters in Django 1.10.

#

# https://docs.djangoproject.com/en/dev/releases/1.8/

if django.VERSION >= (1, 8):

from django.template.loader import render_to_string # noqa

else:

from django.template import loader # noqa

from django.template import RequestContext # noqa

def render_to_string(template_name, context=None, request=None):

context_instance = RequestContext(request) if request else None

return loader.render_to_string(template_name, context,

context_instance)

# DjangoFilterBackend

#

# The DjangoFilterBackend was provided in Django REST Framework from 3.0 to

# 3.4, was marked as pending deprecation in 3.5, was deprecated in 3.6 and will

# be removed in 3.7. However, the equivalent DjangoFilterBackend found in

# django-filter is only available since 1.0 of that package.

#

# http://www.django-rest-framework.org/topics/3.6-announcement/

if settings.ENABLE_REST_API:

import rest_framework # noqa

if rest_framework.VERSION >= '3.5':

from django_filters.rest_framework import DjangoFilterBackend # noqa

else:

from rest_framework.filters import DjangoFilterBackend # noqa

# LOOKUP_FIELD

#

# The django-filter library uses the 'lookup_expr' attribute to determine which

# lookup type to use, e.g. exact, gt, lt etc. However, until 0.13 this was

# called 'lookup_type', and 0.13 supported both but gave a deprecation warning.

# We need to support these versions for use with older versions of DRF.

#

# https://github.com/carltongibson/django-filter/blob/v0.13/django_filters\

# /filters.py#L35-L36

if settings.ENABLE_REST_API:

import django_filters # noqa

if django_filters.VERSION >= (1, 0):

LOOKUP_FIELD = 'lookup_expr'

else:

LOOKUP_FIELD = 'lookup_type'

# reverse

#

# The reverse function has been moved to django.urls in Django 1.10 and

# backwards compatible imports will be removed in Django 2.0

if django.VERSION >= (1, 10):

from django.urls import NoReverseMatch # noqa

from django.urls import reverse # noqa

else:

from django.core.urlresolvers import NoReverseMatch # noqa

from django.core.urlresolvers import reverse # noqa

# is_authenticated

#

# models.User.is_authenticated is now an attribute in Django 1.10 instead of a

# function

#

# https://docs.djangoproject.com/en/dev/releases/1.10/

def is_authenticated(user):

if django.VERSION >= (1, 10):

return user.is_authenticated

else:

return user.is_authenticated()