Why is the form not working?

Question

Django

There is a view:

def userpage(request, us):
    context={}
    context.update(csrf(request))
    if(us==request.user.username):
        return redirect('mypage')
    try:
        context={
            "u":User.objects.get(username__exact=us),
            "user":User,
            # "friends":True,
            # "waiting":True,
            "message":Friend.objects.friends(request.user)
                #is_friends(request.user,us),
        }
    except ObjectDoesNotExist:
        return redirect('/')

    if request.method == 'POST':
        context={}
        context.update(csrf(request))
        # if(request.POST['add_friend_user']==us):
        try:
            other_user=User.objects.get(username__exact=request.POST['add_friend_user'])
            Friend.objects.add_friend(request.user, other_user)
        except ObjectDoesNotExist:
            return redirect("/")

    return render_to_response('page.html',context)

There is a template:

{% extends "base.html"%}
{% load staticfiles %}
{% block title %}{{message}}{% endblock %}
{%block content%}
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
  <script type="text/javascript" src="{% static 'scripts/js/jquery.stellar.js' %}">
  </script>
    <div class="image" id="wall_1" data-stellar-background-ratio="0.5" background-position-x: "0px">
    </div>
    <div id="content_1" class="content">
        <div id="head">
        	<div id="avatar">
        			
        	</div>

        	<div id="name">
        		<h1>{{u.get_full_name}}</h1>
        		<div id="status">&#9679;</div>
        		<div id="username"><a href="{% url 'page' %}{{u.username}}">@{{u.username}}</a></div>
        	</div>
        	<div class="head_buttons">
        			<li><div id="b_1"><a href="#">Профиль</a></div></li>
        			<li><div id="b_2"><a href="#">Друзья</a></div></li>
        			{% if friends %}
        				<li><div id="b_6"><a href="#">Удалить из друзей</a></div></li>
        			{% elif waiting%}
            <li><div id="b_5"><a href="#">Отменить</a></div></li>
        			{%else%}
            <li>
              {# {% url 'page.views.userpage' u.username %} #}
              <form action="" method="POST">
                {% csrf_token %}
                <input type="hidden" readonly="True" name="add_friend_user" id="add_friend_user" value="{{u.username}}">
                <input id="add_friend" type="submit" value="Добавить в друзья">
              </form>	
            </li>
        			{%endif%}
        			<li><div id="b_4"><a href="#"></a></div></li>	
        	</div>
        	<div class="down_head">Дата рождения: {{u.profile.birth}}</div>
        	{% if u.profile.gender != "N" %}
        		<div class="down_head">Пол: {% if u.profile.gender == "M" %}Мужской{%else%}Женский{%endif%}</div>		
        	{%endif%}
        </div>
        <div id="empty"></div>
        <div><p></p></div>
    </div>
....................................................................
{%endblock%}

If the form is inserted somewhere in another template, then everything works, the request is sent, but in this template it gives a 403 csrf error:

Access Error (403)
CSRF validation failed. Request denied.
Help
Reason given for failure:
CSRF token missing or incorrect.
In general, this can occur when there is a genuine Cross Site Request Forgery, or when Django's CSRF mechanism has not been used correctly. For POST forms, you need to ensure:
Your browser is accepting cookies.
The view function passes a request to the template's render method.
In the template, there is a {% csrf_token %} template tag inside each POST form that targets an internal URL.
If you are not using CsrfViewMiddleware, then you must use csrf_protect on any views that use the csrf_token template tag, as well as those that accept the POST data.
You're seeing the help section of this page because you have DEBUG = True in your Django settings file. Change that to False, and only the initial error message will be displayed.
You can customize this page using the CSRF_FAILURE_VIEW setting.

and in terminal:

/home/dosya/.virtualenvs/dosvenv/lib/python3.4/site-packages/django/template/defaulttags.py:66: UserWarning: A {% csrf_token %} was used in a template, but the context did not provide the value.  This is usually caused by not using RequestContext.
  "A {% csrf_token %} was used in a template, but the context "

Add. Attachment:

Please help.

Answer 1

return render(request,'page.html',context)