Django tag on template

240 Views Asked by xSavgs At 24 December 2020 at 14:00

My code:

{% if request.user.is_staff %}
  {% extends "base.html" %}
    {% load crispy_forms_tags %}
    {% block content %}
      <div class="content-section">
          <form method="POST">
              {% csrf_token %}
              <fieldset class="form-group">
                  <legend class="border-bottom mb-4">
                      Create A Post
                  </legend>
                  {{ form|crispy }}
              </fieldset>
              <div class="form-group">
                  <button class="btn btn-outline-info" type="submit">
                      Post
                  </button>
              </div>
          </form>
      </div>
    {% endblock content %}
{% else %}
  <head>
    <meta http-equiv="refresh" content="5; url=/" />
  </head>
  <body>
    <h1>Restricted Access To Staff!</h1>
    <p>You will be redirected to the home page in 5 seconds</p>
  </body>
{% endif %}

The Error:

I can't figure out why it is not working, could it be something to do with the {% if request.user.is_staff %} bit?

Original Q&A

There are 1 best solutions below

willeM_ Van Onsem On 24 December 2020 at 14:04

As the documentation on template inheritance says:

If you use {% extends %} in a template, it must be the first template tag in that template. Template inheritance won’t work, otherwise.

You thus can not work with a {% if … %} … {% else %} … {% endif %} template tag [Django-doc] to determine whether or not to inherit.

You can move this logic to the view, so:

def some_view(request):
    # …
    if request.user.is_staff:
        return render(request, 'my_template.html', context)
    else:
        return render(request, 'my_other_template.html', context)

It might be better to develop a decorator that will automatically check if the user is a staff member, and render content properly, something like:

from functools import wraps

def requires_staff_redirect(f):
    @wraps(f)
    def g(request, *args, **kwargs):
        if not request.user.is_staff:
            return render(request, 'my_other_template.html')
        else:
            return f(*args, **kwargs)
    return g

Then we can decorate a view like:

@requires_staff_redirect
def my_view(request):
    # …

and then it will only trigger the view if the user is a staff member, otherwise it will render the my_other_template.html page.

Django tag on template

There are 1 best solutions below

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