Opened 2 years ago

Closed 2 years ago

Last modified 2 years ago

#21529 closed Cleanup/optimization (fixed)

url tag urlencodes arguments irreversibly

Reported by: leo@… Owned by: nobody
Component: Documentation Version: 1.6
Severity: Normal Keywords: url tag urlencode javascript js
Cc: Triage Stage: Accepted
Has patch: yes Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no


Somewhere between 1.4 and 1.6 the url tag started urlencoding arguments before outputing the URL. This breaks code that wants to build the url inside javascript in the following way:

  var url = '{% url "some_view" "'+some_js_argument+'" %}'

On 1.4 this generates '/some/view/'+some_js_argument+'/'
On 1.6 this generates '/some/view/%27%2Bsome_js_argument%2B%27'

While I understand the rationale behind urlencoding per default, it would be nice to provide a way to avoid it. "|safe" seems to have no effect and even a custom filter to urldecode the output doesn't help, since urlencoding seems to be the last step before output.
Please consider providing a way to disable this, either by filter or by options to the url tag, so that we're not forced to use kludgy workarounds like

  var url = '{% url "some_view" "ARGUMENT_BY_JS" %}'.replace(/ARGUMENT_BY_JS/, some_js_argument)

Additionally, this might be a good thing to mention in the docs.

This is admittedly somewhere between a bug and a feature request, but since this breaks old code, I've decided to submit it as a regression bug.

Attachments (1)

21529.diff (758 bytes) - added by timo 2 years ago.

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Change History (6)

comment:1 Changed 2 years ago by apollo13

  • Component changed from Template system to Documentation
  • Needs documentation set
  • Needs tests unset
  • Patch needs improvement unset
  • Triage Stage changed from Unreviewed to Accepted
  • Type changed from Bug to Cleanup/optimization

I think the url tag should always return proper URLs, but we should document it clearly.

Changed 2 years ago by timo

comment:2 Changed 2 years ago by timo

  • Has patch set
  • Needs documentation unset

comment:3 Changed 2 years ago by timo

For the record, this was introduced in Django 1.6.

comment:4 Changed 2 years ago by Tim Graham <timograham@…>

  • Resolution set to fixed
  • Status changed from new to closed

In dfc092622e5e55081f9a76fddea752494c4505ba:

Fixed #21529 -- Noted that {% url %} encodes its output (refs #13260).

comment:5 Changed 2 years ago by Tim Graham <timograham@…>

In a4c32d70c2bcf9731b6d6ff3370d2260ab4812af:

[1.6.x] Fixed #21529 -- Noted that {% url %} encodes its output (refs #13260).

Backport of dfc092622e from master

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