django - what's the proper way of passing the "request" parameter to a custom template tag

I created a custom template tag that I want to use on every page on my web site. I have a function get_ip inside the custom template tag that needs the request parameter in order to get the IP address from the user. See below:

myapp/templatetags/header_tags.py

---

from django import template
register = template.Library()
...
from django.http import HttpResponse
from django.template import RequestContext
from django.shortcuts import render_to_response
from django.http import HttpResponseRedirect

@register.inclusion_tag('template.html', takes_context = True)
def user_ip(context):
    request = context['r开发者_StackOverflow中文版equest']
    ip = get_ip(request)      
    return render_to_response('template.html',locals(), context_instance=RequestContext(request))

template.html

---

   {{ ip }}

my_main_template.html

---

{% load header_tags %}
{% user_ip %} 

For some reason my the ip is not sowing on my main template. My function get_ip works if used the regular way on views.py page a template but for some reason is not showing when is used from the custom template tag above. Any ideas?

---

You're not supposed to actually render the template in an inclusion tag - the decorator does that for you. You just return the context that should be used to render the template you've specified.

---

Try somenting like this.

@register.inclusion_tag('template.html', takes_context = True)
def user_ip(context):
    return {'ip': get_ip(context['request'])}

---

Your inclusion tag should return a context to be rendered to a template, not render_to_response. Might look like this:

def user_ip(context):
    my_context = {}
    request = context['request']
    my_context['ip'] = get_ip(request)      
    return my_context

register.inclusion_tag('template.html', takes_context = True)(user_ip)