在模板中访问jinja2全局变量 [英] Access jinja2 globals variables inside template

问题描述

我正在构建一个Flask应用程序，并且在从模板中访问jinja2全局变量时遇到问题，对我在这里做错什么有任何想法吗?

I have a Flask app I'm building and I'm having issues accessing my jinja2 globals variables from within my templates, any idea as to what I'm doing wrong here?

__ init __.py

from config import *

...

#Initialize Flask App
app = Flask(__name__)

#Jinja2 global variables
jinja_environ = app.create_jinja_environment()
jinja_environ.globals['DANISH_LOGO_FILE'] = DANISH_LOGO_FILE
jinja_environ.globals['TEMPLATE_MEDIA_FOLDER'] = TEMPLATE_MEDIA_FOLDER

...

config.py

...

TEMPLATE_MEDIA_FOLDER = '../static/img/media_library/' #This is the location of the media_library relative to the templates directory
DANISH_LOGO_FILE = '100danish_logo.png'

...

示例模板

<p>{{ TEMPLATE_MEDIA_FOLDER }}</p>

在这种情况下，TEMPLATE_MEDIA_FOLDER不会在模板上打印任何内容.

In this instance, TEMPLATE_MEDIA_FOLDER prints out nothing to the template.

推荐答案

我假设您使用的是Flask的render_template函数，默认情况下该函数链接到应用程序的jinja_env属性.

I'm going to assume you are using Flask's render_template function here which is by default linked to the application's jinja_env attribute.

所以尝试这样的事情，

app = Flask(__name__)
app.jinja_env.globals['DANISH_LOGO_FILE'] = DANISH_LOGO_FILE
app.jinja_env.globals['TEMPLATE_MEDIA_FOLDER'] = TEMPLATE_MEDIA_FOLDER

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