static_url with a prefix does not work in a Template tag

[joesolly]

when using the Celery UI Flower, I discovered that using the Template tag inside of a template results in the static_url function no longer working as expected. Specifically, it was not prepending the static_root to the resource requested.

It looks to me like static_url might not be loading at all and it might just be returning it's arguments. I believe that might stem from a Template creating it's own namespace here https://github.com/tornadoweb/tornado/blob/master/tornado/template.py#L339-L353 vs using the same namespace function from the global app defined here https://github.com/tornadoweb/tornado/blob/master/tornado/web.py#L1095-L1116 although I'm not entirely confident in that.

Here is the matching issue in Flower that I posted as well.
mher/flower#1338

[bdarnell]

By "Template tag", I assume you mean {% module Template(...) %}? I think you're right that that would lose the functions that are normally created by RequestHandler.get_template_namespace. That would definitely be a problem, but I'd expect the result to be an error when it tries to call the non-existent static_url function. I don't see any way for it to just return its arguments unmodified. Do you have a complete example of this problem?

[joesolly]

@bdarnell thanks for the response. This issue stemmed from my debugging mher/flower#1338. However, the version of code I was reading (2.0.1), was different from the version I had installed (2.0.0), so static_url wasn't even being called in that old version. I had incorrectly assumed that static_url wasn't working, but it turns out it wasn't in the code I had installed at all. Sorry about the incorrect issue.