问如何在Django1.8中使用jinja2作为模板引擎

EN

from __future__ import absolute_import  # Python 2 only
from jinja2 import Environment
from django.contrib.staticfiles.storage import staticfiles_storage
from django.core.urlresolvers import reverse

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

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.jinja2.Jinja2',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'environment': "main.jinja2.environment",
        },
    },
    ...
]

from django.shortcuts import render

def index(request, **kwargs):
    return render(request, "index.html.j2", {'title': 'MyTitle', 'text': "MyText"})

TEMPLATES = [
{
    "BACKEND": "django.template.backends.jinja2.Jinja2",
    "DIRS": [os.path.join(BASE_DIR, "ui", "templates")], # You can add a subdirectory like /jinja2 if you don't want Jinja2 to be default. But for consistency I do not recommand
    "APP_DIRS": True,
    "OPTIONS": {
        'environment': ".".join([os.path.basename(BASE_DIR), 'jinja2.environment']),
        "context_processors": [
            "django.contrib.auth.context_processors.auth",
            "django.template.context_processors.debug",
            "django.template.context_processors.i18n",
            "django.template.context_processors.media",
            "django.template.context_processors.static",
            "django.template.context_processors.tz",
            "django.contrib.messages.context_processors.messages",
        ],
    }
},
{
    "BACKEND": "django.template.backends.django.DjangoTemplates",
    "DIRS": [],
    "APP_DIRS": True,
    "OPTIONS": {
        "context_processors": [
            "django.template.context_processors.debug",
            "django.template.context_processors.request",
            "django.contrib.auth.context_processors.auth",
            "django.contrib.messages.context_processors.messages",
        ],
    },
},]

import inspect
import logging

from django.contrib import messages
from jinja2 import Environment, pass_context
from django.contrib.staticfiles.storage import staticfiles_storage
from django.urls import reverse

import ui.templatetags.extras as extras_filters
from crispy_forms.utils import render_crispy_form

logger = logging.getLogger(__name__)

# /!\ This this how you make csrf token generated by crispy properly injected
@pass_context 
def crispy(context, form):
    return render_crispy_form(form, context=context)

def environment(**options):
    logger.debug("Jinja2 environment loading")
    env = Environment(**options)
    env.globals.update({
       "get_messages": messages.get_messages,
       "static": staticfiles_storage.url,
       "crispy": crispy,  # this line is different
       "url": reverse,
   })
   # Bonus, get your django custom templatetag, backward compatible with Django Template
   env.filters.update(dict(inspect.getmembers(extras_filters, inspect.isfunction)))
   return env

import logging

from django import forms
from crispy_forms.helper import FormHelper
from crispy_forms.layout import Layout, Submit


logger = logging.getLogger(__name__)

class AddRemoteServerForm(forms.Form):
    name = forms.CharField(max_length=20, min_length=3)
    url = forms.CharField(max_length=200)

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.helper = FormHelper()
        self.helper.layout = Layout(
        'name',
        'url',
        Submit('submit', 'Associate Server')
    )

def add_remote_server(request):
if request.method == 'POST':
    form = AddRemoteServerForm(request.POST)
    logger.debug(form.data.dict())
    logger.debug("Form valid ? %s " % form.is_valid())
    if form.is_valid():
        d = form.data.dict()
        # TODO: Implmenent your business logic
        return redirect('/remote_servers/')
else:
    form = AddRemoteServerForm()
context = {'form': form}
return render(request, 'form.html', context)

{% extends "base.html" %}
{% block extraappendjavascript %}
{% endblock %}
{% block content %}
<div class="container">
    <div class="card">
        <div class="card-body">
            {{ crispy(form) }}
        </div>

    </div>
</div>
{% endblock %}

import logging
import os
from datetime import datetime, timedelta

from django.utils.safestring import mark_safe
from django.template import Library

import json


register = Library()

logger = logging.getLogger(__name__)
@register.filter(is_safe=True)
def js(obj):
    try:
        return mark_safe(json.dumps(obj))
    except Exception:
        return "{}"