解决Django换用jinja2模板引擎后admin提示“TemplateDoesNotExist”

jinja2模板引擎号称比Django自带的快10倍，另外还有别的强大的功能，那为什么不用呢？

配置支持jinja2

新增两个文件，把它们放在项目内：

import sys

from django.template.backends import jinja2 as jinja2backend
from django.template.backends.utils import csrf_input_lazy, csrf_token_lazy
from django.template import TemplateDoesNotExist, TemplateSyntaxError
from django.utils.module_loading import import_string
import jinja2
import six

# Original link:
# https://code.djangoproject.com/attachment/ticket/24694/24694.py __author__ = 'carljm'

class Jinja2Backend(jinja2backend.Jinja2):
def __init__(self, params):
self.context_processors = [
import_string(p)
for p in params['OPTIONS'].pop('context_processors', [])
]
super(Jinja2Backend, self).__init__(params)

def from_string(self, template_code):
return Template(
self.env.from_string(template_code), self.context_processors)

def get_template(self, template_name):
try:
return Template(
self.env.get_template(template_name), self.context_processors)
except jinja2.TemplateNotFound as exc:
six.reraise(TemplateDoesNotExist, TemplateDoesNotExist(exc.args),
sys.exc_info()[2])
except jinja2.TemplateSyntaxError as exc:
six.reraise(TemplateSyntaxError, TemplateSyntaxError(exc.args),
sys.exc_info()[2])

class Template(jinja2backend.Template):

def __init__(self, template, context_processors):
self.template = template
self.context_processors = context_processors

def render(self, context=None, request=None):
if context is None:
context = {}
if request is not None:
context['request'] = request
lazy_csrf_input = csrf_input_lazy(request)
context['csrf'] = lambda: lazy_csrf_input
context['csrf_input'] = lazy_csrf_input
context['csrf_token'] = csrf_token_lazy(request)
for cp in self.context_processors:
context.update(cp(request))
#print(context)
return self.template.render(context)

from __future__ import absolute_import

from django.contrib.staticfiles.storage import staticfiles_storage
from django.core.urlresolvers import reverse

from jinja2 import Environment

def environment(**options):
env = Environment(**options)
env.globals.update({
'static': staticfiles_storage.url,
'url': reverse,
})
return env

CONTEXT_PROCESSORS = [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
]

TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': CONTEXT_PROCESSORS,
},
},
{
'BACKEND': 'pathto.backends.Jinja2Backend',
'DIRS': ['templates'],
'APP_DIRS': True,
'OPTIONS': {
'environment': 'pathto.env.environment',
'context_processors': CONTEXT_PROCESSORS,
#'extensions': [your extensions here], #不知道干嘛的
},
},
]