tagging rules prevent capitals colons and underscores in tagnames

[Brian Murray]

Launchpad has tagging rules that prevent capitals colons and underscores in tagnames. Additionally violating these rules fails silently in the ajax UI and with an unexposed error over launchpadlib.

[Brad Figg (brad-figg)]

I just tried adding 'snd_seq' to a bug and that failed as well (silently). So, '_' (underscore) is not allowed either.

[Brad Figg (brad-figg)]

Colon is not accepted as well. I was trying to use a colon to tags audio codecs which are normally specified as two hex numbers separated by a colon.

[Brad Crittenden (bac)]

Attempting to set a tag via lplib with a capital letter also fails, though not silently:

>>> bug.tags = ['ePub']
>>> bug.lp_save()
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/lib/python2.6/dist-packages/lazr/restfulclient/resource.py", line 688, in lp_save
    URI(self.self_link), representation, headers)
  File "/usr/lib/python2.6/dist-packages/lazr/restfulclient/_browser.py", line 332, in patch
    'PATCH', extra_headers=extra_headers)
  File "/usr/lib/python2.6/dist-packages/lazr/restfulclient/_browser.py", line 277, in _request
    raise HTTPError(response, content)
HTTPError: HTTP Error 400: Bad Request

[...]
---
Response body:
---
tags: [ConstraintNotSatisfied(u'ePub')]

[Gabriel Petrovay (gabipetrovay)]

When you try to report a bug with a tag containing a colon (':'), you get an Timeout error page from launchpad and the bug is not created.

I wouldn't see this as a Low priority bug.

At least the tags field should validate this both when reporting a bug (causing a timeout error page) or when changing a bug (the silent ajax problem above)