Re: "TemplateDoesNotExist at /"

On Sat, Feb 25, 2017 at 01:20:49PM -0800, Richard Belew wrote:
> "TemplateDoesNotExist at /"
>
> (full trace log at http://dpaste.com/3XZ8H3C)
>
> this must be near the top of django newby issues, but i'm stumped
> on the simplest example i can generate:
>
> i've used the `settings.TEMPLATES.DIRS` variable to specify a
> shared templates directory (also to simplify things), and
> am using an application's `views.py` file to anchor a
> named url, but the django engine still cannot find the `index.html` file
> i've put there.
>
> what am i missing? any hints appreciated, Rik

[...]

> TEMPLATES = [
> {
> 'BACKEND': 'django.template.backends.django.DjangoTemplates',
>
> 'DIRS': [ ( os.path.join(BASE_DIR, 'templates'), ) ],

This appears to be the incorrect line – here, you set 'DIRS' to a list
containing a single item, which is a tuple containing a path. The
problem is that you wrap the path twice. Django only expects a simple
list of paths, so if you just drop the tuple wrapping the path, you
should be fine::

'DIRS': [os.path.join(BASE_DIR, 'templates')],

> * djggApp/views.py
>
> def index(request):
> template = loader.get_template('index.html')
> context = Context({})
> return HttpResponse(template.render(context))

This is not strictly related to your problem, but I would strongly
advise not to render templates used as HTTP responses in this way.
Instead, you should be using either the render shortcut [1], or
TemplateResponse [2]. They are mostly equivalent, and both accomplish
the same thing as the above code, only with a single function call.
More often than not, less code is better.

Also, unlike TemplateResponse and render, the code above will not
apply context processors, unless you change that Context to a
RequestContext, which is something that's super easy to forget, and
I've actually seen people get bitten by that in the past, and spend a
lot of time trying to figure out why their templates are not behaving.

Cheers,

Michal

[1]: https://docs.djangoproject.com/en/1.10/topics/http/shortcuts/#render
[2]: https://docs.djangoproject.com/en/1.10/ref/template-response/#templateresponse-objects

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