Add 'Did you mean...' when TemplateDoesNotExist occurs

[Min ho Kim]

When 'TemplateDoesNotExist' occurs from using {% extends %} or {% include %} with wrong file names,
technical_500.html only tells you that source does not exist.

For example, use of below code...

base.html
{% block content %}
{% endblock %}

home.html
{% extends 'baseX.html' %}
{% block content %}
This is home
{% endblock %}

will give you...

TemplateDoesNotExist at /
baseX.html

I propose we add some informative message to help find the source of error by adding

Did you mean...
/Users/minhokim/Code/Django/djangodev/empty/templates/base.html
/Users/minhokim/Code/Django/djangodev/empty/templates2/baseXX.html

[Min ho Kim]

Proposed outcome

[Carlton Gibson]

You've assigned to yourself so I presume there's a patch incoming? (Super 🙂)

Assuming it's not too complicated, this sounds like a nice addition... — very happy to have a look and see.

Thanks for the input!

[Mariusz Felisiak]

I'm not sure to be honest. List of templates can be really big and in a consequence difflib.get_close_matches() would be time-consuming. I would prefer to get 500 page quick instead of waiting longer for a hint that may not be really helpful.

[Min ho Kim]

Thanks felixxm for your input.
If this feature request is not accepted/agreed by two of you, I'm happy to have it closed.

[Carlton Gibson]

OK, let's close it.

• Not sure how often folks misspell templates, and...
• If we have hundreds/thousands of templates, it could be slow, so...
• We'd need a way of turning it off, which probably isn't worth the complexity.

(If someone wants to show that it's not slow, even with large numbers of templates, then, well, we could think about it then...)

Thanks both.