Include template context in error page when relevant

[Shai Berger]

When an error is encountered while rendering a template (in Debug mode), Django helpfully displays the template source, followed by the usual stack-trace with local variable values. It could be useful to also include the template context at the point of the error, as these are often the relevant "local variables".

While the context is actually often available as a local variable in one of the function calls close to the bottom of the stack trace, it is not obvious, and requires a somewhat tedious search (there are usually a series of calls taking a context variable, most of them irrelevant).

[Zach Bresser]

Shai,

Can you elaborate on what you mean? Are you suggesting we put the local context variables in a special section instead of with the rest of the local variables?

[Min ho Kim]

Hi Shai Berger,
Could you give some more information about this feature request?
It would be nice to have some example of error page you would like to see.

If anyone else has any idea what the expected error page should look like, please comment.

[Bhupesh panwar]

Hi, I am bhupesh Panwar, i recently reproduce this issue.I have understand the issue very well. So i have a solution that can we create an middleware.py file that logs template context when error happens

[Shai Berger]

First of all, I apologize for missing the calls for more details all these years ago.
Somehow, I only saw them now.

Second,

Replying to Bhupesh panwar:

So i have a solution that can we create an middleware.py file that logs template context when error happens

I think it would be more helpful to put the context in the error page with all the other relevant info, but if you can pick the right context and put it in the log, then IMO:

• It's a good first step towards putting it on the page
• It's already helpful in and of itself

[Antoliny]

​PR

[Bhupesh panwar]

Replying to Shai Berger:
Thank you for reply, Shai, I have already raise an pr.if there might be some issue. i will keep you posted

[Bhupesh panwar]

I created a new pull request because my previous one had some issues. Here is the link: ​https://github.com/django/django/pull/19282 .

The issue is about retrieving the context (dictionary) from the user's views.py. However, I couldn't find a way to retrieve the context from views.py since the context variable name can vary depending on the user.

To illustrate this, I created a context.py file as an example. Could you suggest how we can dynamically retrieve the context variable from views.py?