访问请求在django自定义模板标签 [英] Access request in django custom template tags

问题描述

我的代码在myapp_extras.py中：

 从django导入模板
 
 register = template。图书馆（）
 
 @ register.inclusion_tag（'new / userinfo.html'）
 def address（）：
 address = request.session ['address'] 
 return {'address'：address} 
  

in'settings.py'：

  TEMPLATE_CONTEXT_PROCESSORS =（
django.core.context_processors.auth，
django.core.context_processors.debug 
django.core.context_processors.i18n，
django.core.context_processors.media，
'django.core.context_processors.request'
）
  

但我收到错误：

 code> / items / 
 
中的TemplateSyntaxError在呈现时捕获异常：全局名称'request'未定义
 
原始追溯（最近的最后一次调用）：
文件C：\Python25\lib\site- packages\django\tem print \\ d 
 result = node.render（context）
文件C：\Python25\lib\site-packages\django\template \__init __。py，第915行，在render 
 dict = func（* args）
文件C：\p4\projects\myproject\..\myproject\invoice \templatetags\myapp_extras.py，第9行，地址
 address = request.session ['address'] 
 NameError：全局名称'request'未定义
  

我引用了这个
可以访问当前用户会话

解决方案

请求不是此范围中的变量。你必须首先从上下文得到它。 通过 took_context 到装饰器，并将上下文添加到标签参数。

像这样： / p>

  @ register.inclusion_tag（'new / userinfo.html'，takes_context = True）
 def address（context） 
 request = context ['request'] 
 address = request.session ['address'] 
 return {'address'：address} 
  / pre> 
My code in myapp_extras.py:
from django import template

register = template.Library()

@register.inclusion_tag('new/userinfo.html')
def address():
    address = request.session['address']
    return {'address':address}
in 'settings.py':
TEMPLATE_CONTEXT_PROCESSORS =(
    "django.core.context_processors.auth",
    "django.core.context_processors.debug",
    "django.core.context_processors.i18n",
    "django.core.context_processors.media",
    'django.core.context_processors.request'
)
but I got an error:
TemplateSyntaxError at /items/

Caught an exception while rendering: global name 'request' is not defined

Original Traceback (most recent call last):
  File "C:\Python25\lib\site-packages\django\template\debug.py", line 71, in render_node
    result = node.render(context)
  File "C:\Python25\lib\site-packages\django\template\__init__.py", line 915, in render
    dict = func(*args)
  File "C:\p4\projects\myproject\..\myproject\invoice\templatetags\myapp_extras.py", line 9, in address
    address = request.session['address']
NameError: global name 'request' is not defined
I referenced this one
In Django, is it possible to access the current user session from within a custom tag?.
解决方案
request is not a variable in that scope. You will have to get it from the context first. Pass takes_context to the decorator and add context to the tag arguments.

Like this:
@register.inclusion_tag('new/userinfo.html', takes_context=True)
def address(context):
    request = context['request']
    address = request.session['address']
    return {'address':address}


                        
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