Python django.template.Context() Examples

def render(element, markup_classes):
    element_type = element.__class__.__name__.lower()

    if element_type == 'boundfield':
        add_input_classes(element)
        template = get_template("bootstrapform/field.html")
        context = Context({'field': element, 'classes': markup_classes, 'form': element.form})
    else:
        has_management = getattr(element, 'management_form', None)
        if has_management:
            for form in element.forms:
                for field in form.visible_fields():
                    add_input_classes(field)

            template = get_template("bootstrapform/formset.html")
            context = Context({'formset': element, 'classes': markup_classes})
        else:
            for field in element.visible_fields():
                add_input_classes(field)

            template = get_template("bootstrapform/form.html")
            context = Context({'form': element, 'classes': markup_classes})

    return template.render(context) 

def view_email_preview(request, alert_type, alert_id, automation_id):
    alert_email = get_object_or_404(AlertEmailTemplate, id=automation_id)
    alert_type = get_object_or_404(AlertType, slug=alert_type, unit__in=request.units)
    alert = get_object_or_404(Alert, pk=alert_id, alerttype__unit__in=request.units)

    t = Template( alert_email.content )

    email_context = build_context( alert )    
    email_context['details'] = {}
    for k, v in alert.details.items():
        email_context['details'][k] = str(v)

    rendered_text = t.render( Context(email_context) ) 
    
    return render(request, 'alerts/view_email_preview.html', { 'alert_type':alert_type, 
                                                                'alert':alert, 
                                                                'alert_email':alert_email, 
                                                                'rendered_text':rendered_text }) 

def default_urlconf(request):
    "Create an empty URLconf 404 error response."
    t = DEBUG_ENGINE.from_string(DEFAULT_URLCONF_TEMPLATE)
    c = Context({
        "title": _("Welcome to Django"),
        "heading": _("It worked!"),
        "subheading": _("Congratulations on your first Django-powered page."),
        "instructions": _("Of course, you haven't actually done any work yet. "
            "Next, start your first app by running <code>python manage.py startapp [app_label]</code>."),
        "explanation": _("You're seeing this message because you have <code>DEBUG = True</code> in your "
            "Django settings file and you haven't configured any URLs. Get to work!"),
    })

    return HttpResponse(t.render(c), content_type='text/html')

#
# Templates are embedded in the file so that we know the error handler will
# always work even if the template loader is broken.
# 

def send_email_ticket_confirm(request, payment_info):
    """
    :param request Django request object
    :param payment_info Registration object
    """
    mail_title = u"PyCon Korea 2015 등록확인 안내(Registration confirmation)"
    product = Product()
    variables = Context({
        'request': request,
        'payment_info': payment_info,
        'amount': product.price
    })
    html = get_template('mail/ticket_registered_html.html').render(variables)
    text = get_template('mail/ticket_registered_text.html').render(variables)
    
    msg = EmailMultiAlternatives(
        mail_title,
        text,
        settings.EMAIL_SENDER,
        [payment_info.email])
    msg.attach_alternative(html, "text/html")
    msg.send(fail_silently=False) 

def search(request):
    query = request.GET['q']
    t = loader.get_template('result.html')
    results = Entry.objects.filter(Q(title__icontains=query) | Q(body__icontains=query))#.order_by('created')
    paginator = Paginator(results, 2) #show 10 articles per page
    page = request.GET.get('page')
    try:
        results = paginator.page(page)
    except PageNotAnInteger:
        results = paginator.page(1)
    except EmptyPage:
        results = paginator.page(paginator.num_pages)

    c = Context({ 'query': query, 'results':results })
    return HttpResponse(t.render(c))

#result.html 

def display_form_as_row(form, arg=None):
    """
    Convert the form to a HTML table row
    set arg to be "deleted_flag" to include the deleted field
    """
    output = ["<tr>"]
    if arg == 'hidden':
        output = ['<tr class="hidden">']
    for field in form.visible_fields():
        if field.name == "deleted" and (arg != "deleted_flag"):
            output.append("<td></td>")
            continue
        c = Context({"field":field})
        output.append( FIELD_AS_TD_TEMPLATE.render(c))
    
    for field in form.hidden_fields():
        c = Context({"field":field})
        output.append( FIELD_AS_TD_TEMPLATE_HIDDEN.render(c))
    
    output.append("</tr>")
    
    return mark_safe('\n'.join(output)) 


# from http://stackoverflow.com/questions/35948/django-templates-and-variable-attributes 

def bad_request(request, template_name='400.html'):
    """
    400 error handler.

    Templates: :template:`400.html`
    Context: None
    """
    try:
        template = loader.get_template(template_name)
    except TemplateDoesNotExist:
        return http.HttpResponseBadRequest('<h1>Bad Request (400)</h1>', content_type='text/html')
    return http.HttpResponseBadRequest(template.render())


# This can be called when CsrfViewMiddleware.process_view has not run,
# therefore need @requires_csrf_token in case the template needs
# {% csrf_token %}. 

def get(self, request, object_id):
        model_fields = [f.name for f in self.opts.fields]
        fields = [f for f in request.GET['fields'].split(',') if f in model_fields]
        defaults = {
            "form": self.form,
            "fields": fields,
            "formfield_callback": self.formfield_for_dbfield,
        }
        form_class = modelform_factory(self.model, **defaults)
        form = form_class(instance=self.org_obj)

        helper = FormHelper()
        helper.form_tag = False
        helper.include_media = False
        form.helper = helper

        s = '{% load i18n crispy_forms_tags %}<form method="post" action="{{action_url}}">{% crispy form %}' + \
            '<button type="submit" class="btn btn-success btn-block btn-sm">{% trans "Apply" %}</button></form>'
        t = template.Template(s)
        c = template.Context({'form': form, 'action_url': self.model_admin_url('patch', self.org_obj.pk)})

        return HttpResponse(t.render(c)) 

def GetStatsDataTemplatized(params, template='table'):
    """Returns the stats table run through a template.

    Args:
        params: Example:
                        params = {
                            'v': one of the keys in user_agent.BROWSER_NAV,
                            'current_user_agent': a user agent entity,
                            'user_agents': list_of user agents,
                            'tests': list of test names,
                            'stats': dict - stats[test_name][user_agent],
                            'total_runs': total_runs[test_name],
                            'request_path': request.path,
                            'params': result_parent.params, #optional
                        }

    """
    params['browser_nav'] = result_stats.BROWSER_NAV
    params['is_admin'] = users.is_current_user_admin()
    if not re.search('\?', params['request_path']):
        params['request_path'] = params['request_path'] + '?'
    t = loader.get_template('stats_%s.html' % template)
    template_rendered = t.render(Context(params))
    return template_rendered 

def page_not_found(request, template_name='404.html'):
    """
    Default 404 handler.

    Templates: :template:`404.html`
    Context:
        request_path
            The path of the requested URL (e.g., '/app/pages/bad_page/')
    """
    context = {'request_path': request.path}
    try:
        template = loader.get_template(template_name)
        body = template.render(context, request)
        content_type = None             # Django will use DEFAULT_CONTENT_TYPE
    except TemplateDoesNotExist:
        template = Engine().from_string(
            '<h1>Not Found</h1>'
            '<p>The requested URL {{ request_path }} was not found on this server.</p>')
        body = template.render(Context(context))
        content_type = 'text/html'
    return http.HttpResponseNotFound(body, content_type=content_type) 

def bad_request(request, exception, template_name=ERROR_400_TEMPLATE_NAME):
    """
    400 error handler.

    Templates: :template:`400.html`
    Context: None
    """
    try:
        template = loader.get_template(template_name)
    except TemplateDoesNotExist:
        if template_name != ERROR_400_TEMPLATE_NAME:
            # Reraise if it's a missing custom template.
            raise
        return HttpResponseBadRequest('<h1>Bad Request (400)</h1>', content_type='text/html')
    # No exception content is passed to the template, to not disclose any sensitive information.
    return HttpResponseBadRequest(template.render())


# This can be called when CsrfViewMiddleware.process_view has not run,
# therefore need @requires_csrf_token in case the template needs
# {% csrf_token %}. 

def server_error(request, template_name=ERROR_500_TEMPLATE_NAME):
    """
    500 error handler.

    Templates: :template:`500.html`
    Context: None
    """
    try:
        template = loader.get_template(template_name)
    except TemplateDoesNotExist:
        if template_name != ERROR_500_TEMPLATE_NAME:
            # Reraise if it's a missing custom template.
            raise
        return HttpResponseServerError('<h1>Server Error (500)</h1>', content_type='text/html')
    return HttpResponseServerError(template.render()) 

def render_javascript_catalog(catalog=None, plural=None):
    template = Engine().from_string(js_catalog_template)

    def indent(s):
        return s.replace('\n', '\n  ')

    context = Context({
        'catalog_str': indent(json.dumps(
            catalog, sort_keys=True, indent=2)) if catalog else None,
        'formats_str': indent(json.dumps(
            get_formats(), sort_keys=True, indent=2)),
        'plural': plural,
    })

    return HttpResponse(template.render(context), 'text/javascript') 

def get_doc(self, request=None, context=None):
        content = self.content

        if request:
            template = Template(content)
            context = Context(Tag.create_context(request, context))
            content = template.render(context)

        return BeautifulSoup(content, "html.parser") 

def package_title_style(context):
    ctx = Context(context)
    if 'c_package__exact' in context.request.GET:
        ctx.update({
            "filtered_by_package": context.request.GET['c_package__exact']
        })
    return ctx 

def package_title_script(context):
    ctx = Context(context)
    if 'c_package__exact' in context.request.GET:
        ctx.update({
            "filtered_by_package": context.request.GET['c_package__exact']
        })
    return ctx 

def page_not_found(request, exception, template_name=ERROR_404_TEMPLATE_NAME):
    """
    Default 404 handler.

    Templates: :template:`404.html`
    Context:
        request_path
            The path of the requested URL (e.g., '/app/pages/bad_page/')
        exception
            The message from the exception which triggered the 404 (if one was
            supplied), or the exception class name
    """
    exception_repr = exception.__class__.__name__
    # Try to get an "interesting" exception message, if any (and not the ugly
    # Resolver404 dictionary)
    try:
        message = exception.args[0]
    except (AttributeError, IndexError):
        pass
    else:
        if isinstance(message, str):
            exception_repr = message
    context = {
        'request_path': request.path,
        'exception': exception_repr,
    }
    try:
        template = loader.get_template(template_name)
        body = template.render(context, request)
        content_type = None             # Django will use DEFAULT_CONTENT_TYPE
    except TemplateDoesNotExist:
        if template_name != ERROR_404_TEMPLATE_NAME:
            # Reraise if it's a missing custom template.
            raise
        template = Engine().from_string(
            '<h1>Not Found</h1>'
            '<p>The requested URL {{ request_path }} was not found on this server.</p>')
        body = template.render(Context(context))
        content_type = 'text/html'
    return HttpResponseNotFound(body, content_type=content_type) 

def templates(request, template_id=None):
    if template_id:
        tpl = get_object_or_404(Template, pk=template_id)
        content = tpl.content
        if request.session.get('current_order_id'):
            tpl = template.Template(content)
            order = Order.objects.get(pk=request.session['current_order_id'])
            content = tpl.render(template.Context({'order': order}))

        return HttpResponse(content)

    templates = Template.objects.all()
    return render(request, 'notes/templates.html', {'templates': templates}) 

def get_traceback_text(self):
        "Return plain text version of debug 500 HTTP error page."
        t = DEBUG_ENGINE.from_string(TECHNICAL_500_TEXT_TEMPLATE)
        c = Context(self.get_traceback_data(), autoescape=False, use_l10n=False)
        return t.render(c) 

def get_traceback_html(self):
        "Return HTML version of debug 500 HTTP error page."
        t = DEBUG_ENGINE.from_string(TECHNICAL_500_TEMPLATE)
        c = Context(self.get_traceback_data(), use_l10n=False)
        return t.render(c) 

def csrf_failure(request, reason=""):
    """
    Default view used when request fails CSRF protection
    """
    from django.middleware.csrf import REASON_NO_REFERER, REASON_NO_CSRF_COOKIE
    t = Engine().from_string(CSRF_FAILURE_TEMPLATE)
    c = Context({
        'title': _("Forbidden"),
        'main': _("CSRF verification failed. Request aborted."),
        'reason': reason,
        'no_referer': reason == REASON_NO_REFERER,
        'no_referer1': _(
            "You are seeing this message because this HTTPS site requires a "
            "'Referer header' to be sent by your Web browser, but none was "
            "sent. This header is required for security reasons, to ensure "
            "that your browser is not being hijacked by third parties."),
        'no_referer2': _(
            "If you have configured your browser to disable 'Referer' headers, "
            "please re-enable them, at least for this site, or for HTTPS "
            "connections, or for 'same-origin' requests."),
        'no_cookie': reason == REASON_NO_CSRF_COOKIE,
        'no_cookie1': _(
            "You are seeing this message because this site requires a CSRF "
            "cookie when submitting forms. This cookie is required for "
            "security reasons, to ensure that your browser is not being "
            "hijacked by third parties."),
        'no_cookie2': _(
            "If you have configured your browser to disable cookies, please "
            "re-enable them, at least for this site, or for 'same-origin' "
            "requests."),
        'DEBUG': settings.DEBUG,
        'docs_version': get_docs_version(),
        'more': _("More information is available with DEBUG=True."),
    })
    return HttpResponseForbidden(t.render(c), content_type='text/html') 

def permission_denied(request, template_name='403.html'):
    """
    Permission denied (403) handler.

    Templates: :template:`403.html`
    Context: None

    If the template does not exist, an Http403 response containing the text
    "403 Forbidden" (as per RFC 2616) will be returned.
    """
    try:
        template = loader.get_template(template_name)
    except TemplateDoesNotExist:
        return http.HttpResponseForbidden('<h1>403 Forbidden</h1>', content_type='text/html')
    return http.HttpResponseForbidden(template.render(request=request)) 

def server_error(request, template_name='500.html'):
    """
    500 error handler.

    Templates: :template:`500.html`
    Context: None
    """
    try:
        template = loader.get_template(template_name)
    except TemplateDoesNotExist:
        return http.HttpResponseServerError('<h1>Server Error (500)</h1>', content_type='text/html')
    return http.HttpResponseServerError(template.render()) 

def render_javascript_catalog(catalog=None, plural=None):
    template = Engine().from_string(js_catalog_template)
    indent = lambda s: s.replace('\n', '\n  ')
    context = Context({
        'catalog_str': indent(json.dumps(
            catalog, sort_keys=True, indent=2)) if catalog else None,
        'formats_str': indent(json.dumps(
            get_formats(), sort_keys=True, indent=2)),
        'plural': plural,
    })

    return http.HttpResponse(template.render(context), 'text/javascript') 

def test_with_user(self):
        badges = badges_tag(**{'user': self.user})
        self.assertEqual(len(badges), 1)
        template = Template('''
            {% load badgify_tags %}
            {% badgify_badges user=user as badges %}
            {% for badge in badges %}{{ badge.name }} {{ badge.slug }}{% endfor %}
        ''')
        rendered = template.render(Context({'user': self.user}))
        self.assertIn(self.badge.name, rendered)
        self.assertIn(self.badge.slug, rendered) 

def test_with_username(self):
        badges = badges_tag(**{'username': 'johndoe'})
        self.assertEqual(len(badges), 1)
        template = Template('''
            {% load badgify_tags %}
            {% badgify_badges username="johndoe" as badges %}
            {% for badge in badges %}{{ badge.name }} {{ badge.slug }}{% endfor %}
        ''')
        rendered = template.render(Context({}))
        self.assertIn(self.badge.name, rendered)
        self.assertIn(self.badge.slug, rendered) 

def test_no_args(self):
        badges = badges_tag()
        self.assertEqual(len(badges), 20)
        template = Template('''
            {% load badgify_tags %}
            {% badgify_badges as badges %}
            {% for badge in badges %}{{ badge.name }} {{ badge.slug }}{% endfor %}
        ''')
        rendered = template.render(Context({}))
        for badge in self.badges:
            self.assertIn(badge.name, rendered)
            self.assertIn(badge.slug, rendered) 

def test_match_url_with_kwargs_with_multiple(self):
        template = Template("""
            {% load active_link_tags %}
            {% active_link 'simple || detailed-action' pk=12 %}
        """)
        context = Context({'request': self.client.get('/detailed/action/12/')})
        html = template.render(context)
        assert 'active' in html 

def test_settings_strict(self):
        template = Template("""
            {% load active_link_tags %}
            {% active_link 'simple-action' %}
        """)
        context = Context({'request': self.client.get('/simple/')})
        html = template.render(context)
        assert 'active' not in html 

def test_settings_css_class(self):
        template = Template("""
            {% load active_link_tags %}
            {% active_link 'simple' %}
        """)
        context = Context({'request': self.client.get('/simple/')})
        html = template.render(context)
        assert 'my-active-class' in html